War Thunder Wiki - User contributions [en]

Ke-Ni

2021-08-11T00:32:25Z

U106763829: /* General info */ Cleaned up grammar, edited and revised article

{{Specs-Card
|code=jp_type_98_ke_ni
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
}}

== Description ==

The '''{{Specs|name}}''' is a reserve rank {{Specs|rank}} Japanese light tank {{Battle-rating}}. It was introduced along with the initial Japanese Ground Forces tree in [[Update 1.65 "Way of the Samurai"]].

== General info ==
=== Survivability and armour ===
{{Specs-Tank-Armour}}

With around 12 mm of armour all around, this tank is barely bulletproof. .50 cals will eat you for breakfast, and even German and British machine guns can knock you down at point-blank range (13 mm of maximum penetration). Your crew is cramped and not numerous, which makes surviving a shot extremely unlikely. This is definitely not the tank to expose to any kind of shots. With its small turret and impressive gun depression, hull-down positions improve this vehicle's survivability and should be sought whenever possible.

'''Armour type:'''

* Rolled homogeneous armour

{| class="wikitable"
|-
! Armour !! Front !! Sides !! Rear !! Roof
|-
| Hull || 12 + 10 mm (20-27°) ''Front plate'' 12 mm (71°) ''Front glacis'' 12 mm (2-58°) ''Lower glacis'' || 12 mm (29-34°) ''Top'' 12 mm ''Bottom'' || 10 mm (52°) ''Top'' 10 mm (12-52°) ''Bottom'' || 10 mm
|-
| Turret || 12 mm (0-81°) ''Turret front'' 16 mm ''Gun mantlet'' || 12 mm (25°) || 12 mm (25°) 10 mm (24-25°) ''Rear door'' || 9 mm
|-
|}
'''Notes:'''

* Suspension wheels and tracks are both 15 mm thick.

=== Mobility ===
{{Specs-Tank-Mobility}}


{{tankMobility|abMinHp=141|rbMinHp=115}}

This tank is quite fast and can achieve surprising feats of mobility. Coupled with a good turret traverse speed, this tank can be reliably used in flanking maneuvers. With its narrow tracks and good HP/t ratio, this tank is fast on almost any ground but easily loses speed on rough terrain, steep hills, and sharp turns. Another good characteristic of this tank is its reverse speed of -7 km/h, which allows it to effectively use peek-a-boom tactics.

=== Modifications and economy ===
{{Specs-Economy}}

== Armaments ==
{{Specs-Tank-Armaments}}
=== Main armament ===
{{Specs-Tank-Weapon|1}}

{{main|Type 100 (37 mm)}}

Offering an improved gun and ammunition selection compared to the [[Ha-Go]], this tank offers a good learning curve from its predecessor. Though this cannon does not have the best penetration at rank I, the trademark Japanese APHE has a good amount of HE filler and ensures that each penetrating shot deals damage. This gun only has one type of ammo but this is compensated by the presence of a coaxial MG, which can deal with the unarmored targets and exposed crew members often found at this BR.

{| class="wikitable" style="text-align:center" width="100%"
|-
! colspan="5" | [[Type 100 (37 mm)|37 mm Type 100]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
|-
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
! Stock !! Upgraded !! Full !! Expert !! Aced
! Stock !! Full !! Expert !! Aced
|-
! ''Arcade''
| rowspan="2" | 110 || rowspan="2" | -15°/+18° || rowspan="2" | ±180° || rowspan="2" | Vertical || 16.18 || 22.40 || 27.20 || 30.08 || 32.00 || rowspan="2" | 4.33 || rowspan="2" | 3.83 || rowspan="2" | 3.53 || rowspan="2" | 3.33
|-
! ''Realistic''
| 10.12 || 11.90 || 14.45 || 15.98 || 17.00
|-
|}

==== Ammunition ====
{| class="wikitable" style="text-align:center" width="100%"
! colspan="8" | Penetration statistics
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! colspan="6" | '''Penetration @ 0° Angle of Attack (mm)'''
|-
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
|-
| Type 1 APHE || APHE || 47 || 44 || 32 || 22 || 15 || 10
|-
|}
{| class="wikitable" style="text-align:center" width="100%"
! colspan="10" | Shell details
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! rowspan="2" | Velocity (m/s)
! rowspan="2" | Projectile Mass (kg)
! rowspan="2" | Fuse delay (m)
! rowspan="2" | Fuse sensitivity (mm)
! rowspan="2" | Explosive Mass (TNT equivalent) (g)
! colspan="3" | Ricochet
|-
! 0% !! 50% !! 100%
|-
| Type 1 APHE || APHE || 700 || 0.72 || 1.2 || 9 || 12.8 || 47° || 60° || 65°
|-
|}

==== [[Ammo racks]] ====
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]

{| class="wikitable" style="text-align:center"
|-
! Full ammo
! 1st rack empty
! 2nd rack empty
! 3rd rack empty
! 4th rack empty
! 5th rack empty
! Visual discrepancy
|-
| '''110''' || 105 ''(+5)'' || 99 ''(+11)'' || 81 ''(+29)'' || 41 ''(+69)'' || 1 ''(+109)'' || No
|-
|}

Only left side: 81 ''(+29)''

=== Machine guns ===
{{Specs-Tank-Weapon|2}}

{{main|Type 97 (7.7 mm)}}

{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="5" | [[Type 97 (7.7 mm)|7.7 mm Type 97]]
|-
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
|-
| Coaxial || 3,000 (20) || 499 || N/A || N/A
|-
|}

== Usage in battles ==

Due to its status as a light tan, the Ke-Ni cannot engage enemies head-on. To succeed in an assault, you need to be sneaky. Using the Ke-Ni's good mobility to find an alternate route to flank the enemy and land shots on their thinner side/rear armor is where this tank shines. The 37mm gun can penetrate most Rank I tanks if you hit their weak spots, though it may take a few shots to destroy an enemy. Your first shot should be to take out the enemy's gun/gunner so they can't punish the Ke-Ni's thin armor. After that, take out their engine/driver and go from there. Never linger for too long in an open field since anything can kill you with ease. Use your good gun depression to keep a hull-down position behind hills and just pop out to shoot. Hide in bushes or behind buildings or rocks. You are quite small, so use this to your advantage.

=== Pros and cons ===


'''Pros:'''

* Low profile
* Slightly improved 37 mm cannon compared to the [[Ha-Go|Ha-Go]], able to penetrate the majority of rank 1
* Coaxial [[Type 97 tank (7.7 mm)|Type 97]] machine gun (Japanese early tanks rarely have this feature)
* Large ammo load
* Fast reload time
* Small ammo racks
* Small engine, which is hard to hit from the front
* Good turret traverse
* -15° of depression
* Has lock, which is a primitive form of the vertical stabilizer
* Decent reverse speed (-7 km/h)

'''Cons:'''

* Relatively little armour, can be penetrated by 12.7 mm machine guns
* Only one ammunition choice, can have difficulty dealing with heavily armoured tanks
* Only 3 crew members (little backup if knocked out)
* Crew is cramped
* Hard to angle due to the shape of the armour

== History ==


=== Development ===
The '''{{specs|name}}''' was a replacement program started in 1938, for the [[Ha-Go|Type 95 Ha-Go]]. The tank was supposed to have the same weight but with thicker armour. During development both Hino Motors and Mitsubishi Industries built a prototype being the Chi-Ni* Model A (Ko) and Chi-Ni* Model B (Otsu) respectively. As Hino built a suspension similar to on the [[Ha-Go]], Mitsubishi went for a similar design to the Christie suspension. During trails the Model A performed stunningly better, especially offroad and was adopted as the Type 98 Ke-Ni.

But as the battle results of the [[Ha-Go]] came in, the Army realized the poor strength and disorganization of the Chinese army was no issue for the adequate ageing Ha-Go and didn't need direct replacement.

<nowiki>*</nowiki> Not to be confused with the Chi-Ni medium tank prototype.

=== Design ===
Comparing the Type 98 to the [[Ha-Go|Type 95]], featured thicker, welded armour of improved shape, the height of the tank was 50 cm lower in profile, and slightly lighter and shorter.

With the use of a Mitsubishi Type 100 6-Cylinder air-cooled diesel engine with 130 horsepower, it allowed the vehicle to travel at 50 km/h (31 mph) even with its thicker armour.

Three pairs of bogies with six road-wheels connected to the chassis using bell cranks, this gave the tank better stability over its predecessor which only had two pairs of bogies with four road-wheels.

The driver was located in a central position of the chassis and received a standard wheel.

In contrast to the one-man turret of [[Ha-Go|Type 95]], the Type 98 had a two-man turret, which featured additional room for a loader next to the gunner/commander. The gun was a [[Type 100 (37 mm)|Type 100 37 mm tank gun]] with vertical elevations of -15 to +20 degrees in the turret, a muzzle velocity of 760 m/s, and also a coaxial [[Type 97 (7.7 mm)|Type 97 (7.7 mm) machine gun]] instead of in the back of the turret.

== Media ==
''Excellent additions to the article would be video guides, screenshots from the game, and photos.''

== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''

* ''reference to the series of the vehicles;''
* ''links to approximate analogues of other nations and research trees.''

== External links ==
''Paste links to sources and external resources, such as:''

* ''topic on the official game forum;''
* ''encyclopedia page on the tank;''
* ''other literature.''

{{Japan light tanks}}

I-Go Ko

2021-08-11T00:19:41Z

U106763829: /* Mobility */ Changed two words in the "Mobility" section that I didn't like upon reading through the article again.

{{About
| about = Japanese light tank '''{{PAGENAME}}'''
| usage = equipment of the same adoption year
| link = Type 89 (Disambiguation)
}}
{{Specs-Card
|code=jp_type_89b_i_go_otsu
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
}}

== Description ==

The '''{{Specs|name}}''' is a reserve rank {{Specs|rank}} Japanese light tank {{Battle-rating}}. It was introduced in [[Update 1.65 "Way of the Samurai"]] along with the rest of the initial Japanese Ground Forces Tree.

== General info ==
=== Survivability and armour ===
{{Specs-Tank-Armour}}

The armour on the I-Go Ko is quite lacking against contemporary enemies, which is to say that it may as well not exist. With an armour thickness of less than 20 mm (aside from the spaced areas) all over, even large-calibre machine guns can penetrate the tank frontally. Not to mention, the front armour of 17 mm is only mildly sloped and presents a large target that can knock out every crew member with a single penetration. Never rely on your armour and never advance on an enemy unless they are incapacitated (i.e. gunner or cannon knocked out).

'''Armour type:'''

* Rolled homogeneous armour

{| class="wikitable"
|-
! Armour !! Front !! Sides !! Rear !! Roof
|-
| Hull || 17 mm (32°) ''Front glacis'' || 17 mm ''Top'' 17 + 17 mm ''Bottom'' || 17 mm (61°) ''Top'' 17 mm ''Bottom'' || 10 mm
|-
| Turret || 17 mm (9°) ''Turret front'' 25 mm (10°) ''Gun mantlet'' || 15 mm (10-12°) || 15 mm (11°) || 10 mm
|-
! Armour !! Sides !! Roof
|-
| Cupola || 15 mm || 10 mm
|}

'''Notes:'''

* Suspension wheels and tracks are both 15 mm thick.

=== Mobility ===
{{Specs-Tank-Mobility}}


{{tankMobility|abMinHp=183|rbMinHp=104}}

Much like the armour, the {{PAGENAME}} leaves something to be desired in the mobility department. While the tank is reasonably mobile in close-quarters situations due to the good acceleration, the poor top speed will result in long trips across large maps and between capture points compared to other reserve tanks.

=== Modifications and economy ===
{{Specs-Economy}}

== Armaments ==
{{Specs-Tank-Armaments}}
=== Main armament ===
{{Specs-Tank-Weapon|1}}

{{main|Type 90 (57 mm)}}

{| class="wikitable" style="text-align:center" width="100%"
|-
! colspan="5" | [[Type 90 (57 mm)|57 mm Type 90]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
|-
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
! Stock !! Upgraded !! Full !! Expert !! Aced
! Stock !! Full !! Expert !! Aced
|-
! ''Arcade''
| rowspan="2" | 100 || rowspan="2" | -15°/+20° || rowspan="2" | ±180° || rowspan="2" | Vertical || 14.47 || 20.03 || 24.32 || 26.90 || 28.61 || rowspan="2" | 4.29 || rowspan="2" | 3.80 || rowspan="2" | 3.50 || rowspan="2" | 3.30
|-
! ''Realistic''
| 9.04 || 10.64 || 12.92 || 14.30 || 15.20
|-
|}

==== Ammunition ====
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="8" | Penetration statistics
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! colspan="6" | Penetration @ 0° Angle of Attack (mm)
|-
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
|-
| Type 92 APHE || APHE || 21 || 21 || 19 || 16 || 14 || 13
|-
| Type 3 HEAT || HEAT || 55 || 55 || 55 || 55 || 55 || 55
|-
|}
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="10" | Shell details
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! rowspan="2" | Velocity (m/s)
! rowspan="2" | Projectile Mass (kg)
! rowspan="2" | Fuse delay (m)
! rowspan="2" | Fuse sensitivity (mm)
! rowspan="2" | Explosive Mass (TNT equivalent) (g)
! colspan="3" | Ricochet
|-
! 0% !! 50% !! 100%
|-
| Type 92 APHE || APHE || 349 || 2.58 || 1.2 || 9 || 103 || 47° || 60° || 65°
|-
| Type 3 HEAT || HEAT || 380 || 1.8 || 0.05 || 0.1 || 303.36 || 62° || 69° || 73°
|-
|}

==== [[Ammo racks]] ====
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]

{| class="wikitable" style="text-align:center"
|-
! Full ammo
! 1st rack empty
! 2nd rack empty
! 3rd rack empty
! 4th rack empty
! 5th rack empty
! Visual discrepancy
|-
| '''100''' || 97 ''(+3)'' || 61 ''(+39)'' || 49 ''(+51)'' || 13 ''(+87)'' || 1 ''(+99)'' || No
|-
|}
'''Notes''':

* The ammo racks in the I-Go Ko are rather small due to the small ammunition. Because of the tank's thin armor encouraging center of mass shots and the tightly clustered crew, destruction by crew knockout is much, much more common than ammo rack detonation. Don't be afraid to bring more ammo than other similar tanks.
* However, to minimize racks to further avoid detonation, emptying all the way to the 3rd rack at 49(+51) total rounds will leave only two rather small racks remaining. If even more ammo is required, removing only the ammo rack in the turret at 97(+3) rounds offers plenty of rounds at your disposal.

=== Machine guns ===
{{Specs-Tank-Weapon|2}}

{{main|Type 91 (6.5 mm)}}

The Type 91 machine gun is mounted at the hull with limited traverse. With a limited magazine capacity and small caliber, this machine gun doesn't serve much use except as a possible harassing tool against open-topped SPAA or to ping enemies for teammates.

{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="5" | [[Type 91 (6.5 mm)|6.5 mm Type 91]]
|-
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
|-
| Hull || 3,000 (30) || 499 || ±22° || ±25°
|-
|}

== Usage in battles ==

The Type 89b I-Go Ko, despite its rather tractor-esque look, is a mobile tank that could use its speed to get to an enemy's flanks and cause some serious damage. The 57 mm cannon is unfortunately rather pitiful even in Rank I, with a penetration value of between 20 to 30 mm with APHE at standard combat ranges. Therefore, it is best to catch enemies unaware and go for flanking shots against their weaker side armour using the flanks. The 57 mm low-velocity shell does have an advantage of a rather prominent parabolic trajectory so it is possible to lob shells over hills to hit unsuspecting enemies behind it. The gun's poor penetration has thankfully been changed with the addition of a High Explosive Anti-Tank (HEAT) shell for the Japanese 5.7cm Type 97 cannon. This shell has 55mm of penetration at any range but still has considerable drop-off due to the low velocity of the gun. It's a good enough anti-everything that can penetrate most targets you will meet, especially those pesky French tanks, which tend to be quite well armoured. The Type 3 HEAT shell, fortunately, has just enough penetration to get through them, although you should always try to aim for weak spots and never assume that you will penetrate no matter what.

Pretty much everything is a threat to this vehicle due to its mediocre mobility and terrible armour. '''Fast vehicles''' (BTs, M2A1, Tetrarch, T-60) in particular are an uneasy encounter; the I-Go is reasonably fast at close quarters, but not that fast. The tank's sluggish turret traverse makes tracking a close target difficult and at long range the slow shells are a pain to aim precisely at a moving target. The 45mm 20-K that the all too common BTs have can easily kill you at any range with a well-aimed shot. '''Autocanons''' (72-K GAZ AAA, Pz. IIs, Flakpanzers, M13, T17E2, etc.) are the I-Go Ko's worst nightmare since their high volume of fire and good mobility coupled with the I-Go's lack of a coaxial or pintle mounted MG to pressure exposed crew places the I-Go at a tremendous disadvantage. Give SPAA vehicles your upmost attention when driving this vehicle.

'''Pros:'''

* Decent forward speed and good accelleration
* Parabolic trajectory lets you lob 57 mm rounds over hills
* APHE has a huge amount of explosive mass, especially for the calibre
* Great gun depression
* Type 3 HEAT shell can get though most tanks you meet rather easily with 55 mm of pen and ok post-pen damage

'''Cons:'''

* Very poor armor layout
** Extremely thin and flat 17 mm of armor
** Normalizing plates discourage angling (though it often still works due to most lower tier players not knowing where to shoot)
* 57 mm armament has very low muzzle velocity and APHE penetration - can struggle to hurt many of the tanks it will face, even from the sides
* Slow turret and hull traverse speed even when upgraded
* Rather tall for a Rank I tank (not as bad as [[LVT(A)(1)]] though)
* Machine gun only fires forwards in a limited arc
* The only tank that isn't a threat to you is the Light Tank mk. VI AA (rank I British SPAA)

== History ==

===Development===
Japan's early pioneering into the concept of armoured warfare began as early as October 1918 during the first World War. They were able to acquire a few tank samples from the European governments, ranging from a British Mark IV tank, Medium A Whippet tanks, and Renault FT tanks. These tanks would make up Japan's first tank units in 1925. Their experiences with these tanks led to the eventual development of their own domestic tank design. The requirement for this new tank was given to the 4th Military Laboratory under the Imperial Japanese Army's jurisdiction and was mainly in charge of land vehicle development. In the summer of 1926, the first prototype was completed with the design of three turrets, one main in the middle and two smaller ones in the front and rear. The design was deemed too heavy at 18 tons and so development restarted, the initial design carrying on in the failed Type 91 and 95 tanks. During this time, a trial with a British Vickers Model C tank had the tank's gasoline engine catch fire. This prompted the Japanese to fit their tanks with a diesel engine instead. The development led to a new design in 1929, titled '''Type 89 I-Go'''. Though it is considered to be a light tank, the designation changed to a medium tank due to its weight of 10 tons.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89's construction was assigned to Sagami Arsenal, but it was subcontracted to private firms due to Sagami's lack in industry. One of the firms was Mitsubishi Heavy Industries, which developed a tank plant specifically for the Type 89. The Type 89 production officially started in 1931, with mass-production in 1933 and continued until 1939 with 404 tanks built.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

[[File:Type_89,_early_version_front_view.jpg|300px|thumb|right|Front 3/4 view of an Imperial Japanese Army Type 89a ''I-Go Ko''.]]
===Design===
The Type 89 I-Go was Japan's first domestic tank design, yet it showed a lot of features that were revolutionary and would become a trademark of the Japanese tank designs. The Type 89 I-Go had a four-man crew in the tank with two in the turret. The turret held a 57 mm low-velocity gun meant for fighting fortifications due to the tank's role as infantry support. A peculiar feature on the Type 89 was the rear machine gun on the back of the turret. This machine gun was meant to enable the Type 89 to engage forward targets with a machine gun or it's 57 mm gun and would be a design trend in future tank development.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 design changed gradually over time due to troop experience and advances in technology. For example, a small change that occurred for the Type 89 was the change of the commander's cupola from a "top hat" or "lid" design to a split hatch design. A noticeable change was in the engine when the first models produced off the lines were powered by a 118hp gasoline engine, these tanks were labelled as ''Type 89A I-Go Ko''. It wasn't until 1934 when a change to 120hp Mitsubishi diesel engine was made that the Type 89 was redesignated the ''Type 89B I-Go Otsu''. This diesel engine made the Type 89 the first mass-produced tank that uses diesel as its fuel.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 does carry its few flaws, however. The tank was quite slow at about 25 km/h (16 mph), a hindrance to mobile operations using motorized infantry that must wait for the tanks to reach the combat zone. The armour was quite thin at 17 mm and the 57 mm's anti-tank power was quite abyssal. However, against the Chinese troops from 1932 onwards, the armour and firepower flaws were small worries due to the lack of available tanks and anti-tank defences on the Chinese side.

===Combat usage===
The Type 89 was first used in 1932 in the 1st Special Tank Company after the Manchurian Incident. The company, armed with Type 89 along with Renault FT and NC tanks, took part in the conflict between China and Japan in the Shanghai Incident. The experience showed that the Type 89 performed well in comparison to the Renaults and soon the entire company was fitted with Type 89s, retiring the Renaults.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The mass production of the Type 89 from 1933 onwards allowed the formation of large tank groups in Japan, leading to the 1st and 3rd Tank Regiment in Kurume, Fukuoka with the 2nd Tank Regiment at Chiba Tank School. The 1st Tank Regiment would be deployed with the Kwantung Army in China, where it would carry the Type 89 tank in the conflict against China from 1937 onwards.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

By 1939, the Type 89 was starting to be succeeded by newer Japanese tanks, but they still served on the frontlines such as the border conflicts between Japan and the Soviet Union. In the Battle of Khalkhin Gol, the IJA's 1st Tank Corps attacked the Soviet 11th Tank and 7th Armoured brigades in July with a mixture of Type 89s, [[Chi-Ha|Type 97 mediums]], [[Ha-Go|Type 95 lights]], and tankettes in the 3rd and 4th Tank Regiments. Though the attack stirred up Soviet lines, there was no breakthrough in Soviet lines. The Soviets, armed with [[T-26|T-26]] and [[BT-5|BT]] [[BT-7|light tanks]], would soon push the Japanese back to Manchuria and have a cease-fire signed on 24 August.

Though the Type 89 was mostly withdrawn from service and replaced with the [[Ha-Go|Ha-Go]] and [[Chi-Ha|Chi-Ha]], the I-Go still served as far into the battles for the Philippines, Malaya and Burma. Some tanks saw further use as static pillboxes in the Japanese islands of the Pacific, but these tanks were vulnerable to newer anti-tank and tank technology of the Americans with their bazookas and [[M4|M4 Shermans]] once they started their island-hopping strategy against Imperial Japan.

Even after World War II, some Type 89s were still seen in service of the French during the First Indochina War, using the captured Japanese armour in a unit known as 'Commando Blindé du Cambodge'.

===Surviving Tanks===
[[File:Type 89b I-Go at Tsuchira.jpg|thumb|Restored Type 89b ''I-Go Otsu'' at Tsuchira tank museum open day.]]
{{Break}}
Many Type 89 relics still are visible in the wild usually reduced to a wreck with a handful of tanks still being in a good condition. These in good condition are located in:

* The Ordnance Training Support Facility, Ft. Lee, VA, USA.
* The Japanese Ground Self-Defense Force base at Tsuchiura, Ibaraki, Japan.
* Sinbudai Old Weapon Museum, Camp Asaka, Japan
* Villa Escudero, Tiaong, Quezon Province, Philippines

Only 1 I-Go Otsu remains in running condition, which was restored at the JGSDF base at Tsuchiura together with the last [[Chi-Nu|Type 3 ''Chi-Nu'']] to still exist. Both are stored on military ground so aren't at all times in public display. The I-Go Otsu usually makes an appearance during the open day of the Tsuchiura base. The vehicle can be seen in [[#Media|media]] still running after being restored by the JGSDF.

== Media ==


;Skins

* [https://live.warthunder.com/feed/camouflages/?vehicle=jp_type_89b_i_go_otsu Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]

;Images
<gallery mode="packed-hover" heights="250px">
ChiNuIGo.png|Type 3 Chi-Nu & Type 89 I-Go on display, The first and last Japanese Army production medium tank.
ArtImage I-Go Ko.png|Type 89 I-Go assaulting on White Rock Fortress.
</gallery>

;Videos
{{Youtube-gallery|p9_XD0TgdiA|'''TOP 5 Reserve Tanks''' discusses the {{PAGENAME}} at 2:23 - ''War Thunder Official Channel''|b16n19phUBI|Type 89 I-Go Japanese medium tank|c8WHPgdkdOc|Type 89 IJA training exercise - September 1941|LBM3eMJJRjg|Type 89b - Running at Tsuchiura, Japan|0snxs-JL8i8|Look at interior of a Type 89}}

== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''

* ''reference to the series of the vehicles;''
* ''links to approximate analogues of other nations and research trees.''

== External links ==


* [[wt:en/news/4341-development-type-89-i-go-ko-first-series-en/|[Devblog] Type 89 I-Go Ko: First Series]]

=== References ===
<references />

{{Japan light tanks}}

I-Go Ko

2021-08-11T00:18:27Z

U106763829: /* Ammo racks */ Cleaned up grammar, added to and improved overall article.

{{About
| about = Japanese light tank '''{{PAGENAME}}'''
| usage = equipment of the same adoption year
| link = Type 89 (Disambiguation)
}}
{{Specs-Card
|code=jp_type_89b_i_go_otsu
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
}}

== Description ==

The '''{{Specs|name}}''' is a reserve rank {{Specs|rank}} Japanese light tank {{Battle-rating}}. It was introduced in [[Update 1.65 "Way of the Samurai"]] along with the rest of the initial Japanese Ground Forces Tree.

== General info ==
=== Survivability and armour ===
{{Specs-Tank-Armour}}

The armour on the I-Go Ko is quite lacking against contemporary enemies, which is to say that it may as well not exist. With an armour thickness of less than 20 mm (aside from the spaced areas) all over, even large-calibre machine guns can penetrate the tank frontally. Not to mention, the front armour of 17 mm is only mildly sloped and presents a large target that can knock out every crew member with a single penetration. Never rely on your armour and never advance on an enemy unless they are incapacitated (i.e. gunner or cannon knocked out).

'''Armour type:'''

* Rolled homogeneous armour

{| class="wikitable"
|-
! Armour !! Front !! Sides !! Rear !! Roof
|-
| Hull || 17 mm (32°) ''Front glacis'' || 17 mm ''Top'' 17 + 17 mm ''Bottom'' || 17 mm (61°) ''Top'' 17 mm ''Bottom'' || 10 mm
|-
| Turret || 17 mm (9°) ''Turret front'' 25 mm (10°) ''Gun mantlet'' || 15 mm (10-12°) || 15 mm (11°) || 10 mm
|-
! Armour !! Sides !! Roof
|-
| Cupola || 15 mm || 10 mm
|}

'''Notes:'''

* Suspension wheels and tracks are both 15 mm thick.

=== Mobility ===
{{Specs-Tank-Mobility}}


{{tankMobility|abMinHp=183|rbMinHp=104}}

Much like the armour, the {{PAGENAME}} leaves something to be desired in the mobility department. While the tank is reasonably mobile in close-quarters situations due to the good acceleration and hull traverse, the poor top speed will result in long trips across large maps and between capture points compared to other reserve tanks.

=== Modifications and economy ===
{{Specs-Economy}}

== Armaments ==
{{Specs-Tank-Armaments}}
=== Main armament ===
{{Specs-Tank-Weapon|1}}

{{main|Type 90 (57 mm)}}

{| class="wikitable" style="text-align:center" width="100%"
|-
! colspan="5" | [[Type 90 (57 mm)|57 mm Type 90]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
|-
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
! Stock !! Upgraded !! Full !! Expert !! Aced
! Stock !! Full !! Expert !! Aced
|-
! ''Arcade''
| rowspan="2" | 100 || rowspan="2" | -15°/+20° || rowspan="2" | ±180° || rowspan="2" | Vertical || 14.47 || 20.03 || 24.32 || 26.90 || 28.61 || rowspan="2" | 4.29 || rowspan="2" | 3.80 || rowspan="2" | 3.50 || rowspan="2" | 3.30
|-
! ''Realistic''
| 9.04 || 10.64 || 12.92 || 14.30 || 15.20
|-
|}

==== Ammunition ====
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="8" | Penetration statistics
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! colspan="6" | Penetration @ 0° Angle of Attack (mm)
|-
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
|-
| Type 92 APHE || APHE || 21 || 21 || 19 || 16 || 14 || 13
|-
| Type 3 HEAT || HEAT || 55 || 55 || 55 || 55 || 55 || 55
|-
|}
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="10" | Shell details
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! rowspan="2" | Velocity (m/s)
! rowspan="2" | Projectile Mass (kg)
! rowspan="2" | Fuse delay (m)
! rowspan="2" | Fuse sensitivity (mm)
! rowspan="2" | Explosive Mass (TNT equivalent) (g)
! colspan="3" | Ricochet
|-
! 0% !! 50% !! 100%
|-
| Type 92 APHE || APHE || 349 || 2.58 || 1.2 || 9 || 103 || 47° || 60° || 65°
|-
| Type 3 HEAT || HEAT || 380 || 1.8 || 0.05 || 0.1 || 303.36 || 62° || 69° || 73°
|-
|}

==== [[Ammo racks]] ====
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]

{| class="wikitable" style="text-align:center"
|-
! Full ammo
! 1st rack empty
! 2nd rack empty
! 3rd rack empty
! 4th rack empty
! 5th rack empty
! Visual discrepancy
|-
| '''100''' || 97 ''(+3)'' || 61 ''(+39)'' || 49 ''(+51)'' || 13 ''(+87)'' || 1 ''(+99)'' || No
|-
|}
'''Notes''':

* The ammo racks in the I-Go Ko are rather small due to the small ammunition. Because of the tank's thin armor encouraging center of mass shots and the tightly clustered crew, destruction by crew knockout is much, much more common than ammo rack detonation. Don't be afraid to bring more ammo than other similar tanks.
* However, to minimize racks to further avoid detonation, emptying all the way to the 3rd rack at 49(+51) total rounds will leave only two rather small racks remaining. If even more ammo is required, removing only the ammo rack in the turret at 97(+3) rounds offers plenty of rounds at your disposal.

=== Machine guns ===
{{Specs-Tank-Weapon|2}}

{{main|Type 91 (6.5 mm)}}

The Type 91 machine gun is mounted at the hull with limited traverse. With a limited magazine capacity and small caliber, this machine gun doesn't serve much use except as a possible harassing tool against open-topped SPAA or to ping enemies for teammates.

{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="5" | [[Type 91 (6.5 mm)|6.5 mm Type 91]]
|-
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
|-
| Hull || 3,000 (30) || 499 || ±22° || ±25°
|-
|}

== Usage in battles ==

The Type 89b I-Go Ko, despite its rather tractor-esque look, is a mobile tank that could use its speed to get to an enemy's flanks and cause some serious damage. The 57 mm cannon is unfortunately rather pitiful even in Rank I, with a penetration value of between 20 to 30 mm with APHE at standard combat ranges. Therefore, it is best to catch enemies unaware and go for flanking shots against their weaker side armour using the flanks. The 57 mm low-velocity shell does have an advantage of a rather prominent parabolic trajectory so it is possible to lob shells over hills to hit unsuspecting enemies behind it. The gun's poor penetration has thankfully been changed with the addition of a High Explosive Anti-Tank (HEAT) shell for the Japanese 5.7cm Type 97 cannon. This shell has 55mm of penetration at any range but still has considerable drop-off due to the low velocity of the gun. It's a good enough anti-everything that can penetrate most targets you will meet, especially those pesky French tanks, which tend to be quite well armoured. The Type 3 HEAT shell, fortunately, has just enough penetration to get through them, although you should always try to aim for weak spots and never assume that you will penetrate no matter what.

Pretty much everything is a threat to this vehicle due to its mediocre mobility and terrible armour. '''Fast vehicles''' (BTs, M2A1, Tetrarch, T-60) in particular are an uneasy encounter; the I-Go is reasonably fast at close quarters, but not that fast. The tank's sluggish turret traverse makes tracking a close target difficult and at long range the slow shells are a pain to aim precisely at a moving target. The 45mm 20-K that the all too common BTs have can easily kill you at any range with a well-aimed shot. '''Autocanons''' (72-K GAZ AAA, Pz. IIs, Flakpanzers, M13, T17E2, etc.) are the I-Go Ko's worst nightmare since their high volume of fire and good mobility coupled with the I-Go's lack of a coaxial or pintle mounted MG to pressure exposed crew places the I-Go at a tremendous disadvantage. Give SPAA vehicles your upmost attention when driving this vehicle.

'''Pros:'''

* Decent forward speed and good accelleration
* Parabolic trajectory lets you lob 57 mm rounds over hills
* APHE has a huge amount of explosive mass, especially for the calibre
* Great gun depression
* Type 3 HEAT shell can get though most tanks you meet rather easily with 55 mm of pen and ok post-pen damage

'''Cons:'''

* Very poor armor layout
** Extremely thin and flat 17 mm of armor
** Normalizing plates discourage angling (though it often still works due to most lower tier players not knowing where to shoot)
* 57 mm armament has very low muzzle velocity and APHE penetration - can struggle to hurt many of the tanks it will face, even from the sides
* Slow turret and hull traverse speed even when upgraded
* Rather tall for a Rank I tank (not as bad as [[LVT(A)(1)]] though)
* Machine gun only fires forwards in a limited arc
* The only tank that isn't a threat to you is the Light Tank mk. VI AA (rank I British SPAA)

== History ==

===Development===
Japan's early pioneering into the concept of armoured warfare began as early as October 1918 during the first World War. They were able to acquire a few tank samples from the European governments, ranging from a British Mark IV tank, Medium A Whippet tanks, and Renault FT tanks. These tanks would make up Japan's first tank units in 1925. Their experiences with these tanks led to the eventual development of their own domestic tank design. The requirement for this new tank was given to the 4th Military Laboratory under the Imperial Japanese Army's jurisdiction and was mainly in charge of land vehicle development. In the summer of 1926, the first prototype was completed with the design of three turrets, one main in the middle and two smaller ones in the front and rear. The design was deemed too heavy at 18 tons and so development restarted, the initial design carrying on in the failed Type 91 and 95 tanks. During this time, a trial with a British Vickers Model C tank had the tank's gasoline engine catch fire. This prompted the Japanese to fit their tanks with a diesel engine instead. The development led to a new design in 1929, titled '''Type 89 I-Go'''. Though it is considered to be a light tank, the designation changed to a medium tank due to its weight of 10 tons.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89's construction was assigned to Sagami Arsenal, but it was subcontracted to private firms due to Sagami's lack in industry. One of the firms was Mitsubishi Heavy Industries, which developed a tank plant specifically for the Type 89. The Type 89 production officially started in 1931, with mass-production in 1933 and continued until 1939 with 404 tanks built.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

[[File:Type_89,_early_version_front_view.jpg|300px|thumb|right|Front 3/4 view of an Imperial Japanese Army Type 89a ''I-Go Ko''.]]
===Design===
The Type 89 I-Go was Japan's first domestic tank design, yet it showed a lot of features that were revolutionary and would become a trademark of the Japanese tank designs. The Type 89 I-Go had a four-man crew in the tank with two in the turret. The turret held a 57 mm low-velocity gun meant for fighting fortifications due to the tank's role as infantry support. A peculiar feature on the Type 89 was the rear machine gun on the back of the turret. This machine gun was meant to enable the Type 89 to engage forward targets with a machine gun or it's 57 mm gun and would be a design trend in future tank development.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 design changed gradually over time due to troop experience and advances in technology. For example, a small change that occurred for the Type 89 was the change of the commander's cupola from a "top hat" or "lid" design to a split hatch design. A noticeable change was in the engine when the first models produced off the lines were powered by a 118hp gasoline engine, these tanks were labelled as ''Type 89A I-Go Ko''. It wasn't until 1934 when a change to 120hp Mitsubishi diesel engine was made that the Type 89 was redesignated the ''Type 89B I-Go Otsu''. This diesel engine made the Type 89 the first mass-produced tank that uses diesel as its fuel.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 does carry its few flaws, however. The tank was quite slow at about 25 km/h (16 mph), a hindrance to mobile operations using motorized infantry that must wait for the tanks to reach the combat zone. The armour was quite thin at 17 mm and the 57 mm's anti-tank power was quite abyssal. However, against the Chinese troops from 1932 onwards, the armour and firepower flaws were small worries due to the lack of available tanks and anti-tank defences on the Chinese side.

===Combat usage===
The Type 89 was first used in 1932 in the 1st Special Tank Company after the Manchurian Incident. The company, armed with Type 89 along with Renault FT and NC tanks, took part in the conflict between China and Japan in the Shanghai Incident. The experience showed that the Type 89 performed well in comparison to the Renaults and soon the entire company was fitted with Type 89s, retiring the Renaults.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The mass production of the Type 89 from 1933 onwards allowed the formation of large tank groups in Japan, leading to the 1st and 3rd Tank Regiment in Kurume, Fukuoka with the 2nd Tank Regiment at Chiba Tank School. The 1st Tank Regiment would be deployed with the Kwantung Army in China, where it would carry the Type 89 tank in the conflict against China from 1937 onwards.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

By 1939, the Type 89 was starting to be succeeded by newer Japanese tanks, but they still served on the frontlines such as the border conflicts between Japan and the Soviet Union. In the Battle of Khalkhin Gol, the IJA's 1st Tank Corps attacked the Soviet 11th Tank and 7th Armoured brigades in July with a mixture of Type 89s, [[Chi-Ha|Type 97 mediums]], [[Ha-Go|Type 95 lights]], and tankettes in the 3rd and 4th Tank Regiments. Though the attack stirred up Soviet lines, there was no breakthrough in Soviet lines. The Soviets, armed with [[T-26|T-26]] and [[BT-5|BT]] [[BT-7|light tanks]], would soon push the Japanese back to Manchuria and have a cease-fire signed on 24 August.

Though the Type 89 was mostly withdrawn from service and replaced with the [[Ha-Go|Ha-Go]] and [[Chi-Ha|Chi-Ha]], the I-Go still served as far into the battles for the Philippines, Malaya and Burma. Some tanks saw further use as static pillboxes in the Japanese islands of the Pacific, but these tanks were vulnerable to newer anti-tank and tank technology of the Americans with their bazookas and [[M4|M4 Shermans]] once they started their island-hopping strategy against Imperial Japan.

Even after World War II, some Type 89s were still seen in service of the French during the First Indochina War, using the captured Japanese armour in a unit known as 'Commando Blindé du Cambodge'.

===Surviving Tanks===
[[File:Type 89b I-Go at Tsuchira.jpg|thumb|Restored Type 89b ''I-Go Otsu'' at Tsuchira tank museum open day.]]
{{Break}}
Many Type 89 relics still are visible in the wild usually reduced to a wreck with a handful of tanks still being in a good condition. These in good condition are located in:

* The Ordnance Training Support Facility, Ft. Lee, VA, USA.
* The Japanese Ground Self-Defense Force base at Tsuchiura, Ibaraki, Japan.
* Sinbudai Old Weapon Museum, Camp Asaka, Japan
* Villa Escudero, Tiaong, Quezon Province, Philippines

Only 1 I-Go Otsu remains in running condition, which was restored at the JGSDF base at Tsuchiura together with the last [[Chi-Nu|Type 3 ''Chi-Nu'']] to still exist. Both are stored on military ground so aren't at all times in public display. The I-Go Otsu usually makes an appearance during the open day of the Tsuchiura base. The vehicle can be seen in [[#Media|media]] still running after being restored by the JGSDF.

== Media ==


;Skins

* [https://live.warthunder.com/feed/camouflages/?vehicle=jp_type_89b_i_go_otsu Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]

;Images
<gallery mode="packed-hover" heights="250px">
ChiNuIGo.png|Type 3 Chi-Nu & Type 89 I-Go on display, The first and last Japanese Army production medium tank.
ArtImage I-Go Ko.png|Type 89 I-Go assaulting on White Rock Fortress.
</gallery>

;Videos
{{Youtube-gallery|p9_XD0TgdiA|'''TOP 5 Reserve Tanks''' discusses the {{PAGENAME}} at 2:23 - ''War Thunder Official Channel''|b16n19phUBI|Type 89 I-Go Japanese medium tank|c8WHPgdkdOc|Type 89 IJA training exercise - September 1941|LBM3eMJJRjg|Type 89b - Running at Tsuchiura, Japan|0snxs-JL8i8|Look at interior of a Type 89}}

== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''

* ''reference to the series of the vehicles;''
* ''links to approximate analogues of other nations and research trees.''

== External links ==


* [[wt:en/news/4341-development-type-89-i-go-ko-first-series-en/|[Devblog] Type 89 I-Go Ko: First Series]]

=== References ===
<references />

{{Japan light tanks}}

I-Go Ko

2021-08-10T23:41:47Z

U106763829: /* Mobility */ Added to and improved summary of tank's mobility

{{About
| about = Japanese light tank '''{{PAGENAME}}'''
| usage = equipment of the same adoption year
| link = Type 89 (Disambiguation)
}}
{{Specs-Card
|code=jp_type_89b_i_go_otsu
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
}}

== Description ==

The '''{{Specs|name}}''' is a reserve rank {{Specs|rank}} Japanese light tank {{Battle-rating}}. It was introduced in [[Update 1.65 "Way of the Samurai"]] along with the rest of the initial Japanese Ground Forces Tree.

== General info ==
=== Survivability and armour ===
{{Specs-Tank-Armour}}

The armour on the I-Go Ko is quite lacking against contemporary enemies, which is to say that it may as well not exist. With an armour thickness of less than 20 mm (aside from the spaced areas) all over, even large-calibre machine guns can penetrate the tank frontally. Not to mention, the front armour of 17 mm is only mildly sloped and presents a large target that can knock out every crew member with a single penetration. Never rely on your armour and never advance on an enemy unless they are incapacitated (i.e. gunner or cannon knocked out).

'''Armour type:'''

* Rolled homogeneous armour

{| class="wikitable"
|-
! Armour !! Front !! Sides !! Rear !! Roof
|-
| Hull || 17 mm (32°) ''Front glacis'' || 17 mm ''Top'' 17 + 17 mm ''Bottom'' || 17 mm (61°) ''Top'' 17 mm ''Bottom'' || 10 mm
|-
| Turret || 17 mm (9°) ''Turret front'' 25 mm (10°) ''Gun mantlet'' || 15 mm (10-12°) || 15 mm (11°) || 10 mm
|-
! Armour !! Sides !! Roof
|-
| Cupola || 15 mm || 10 mm
|}

'''Notes:'''

* Suspension wheels and tracks are both 15 mm thick.

=== Mobility ===
{{Specs-Tank-Mobility}}


{{tankMobility|abMinHp=183|rbMinHp=104}}

Much like the armour, the {{PAGENAME}} leaves something to be desired in the mobility department. While the tank is reasonably mobile in close-quarters situations due to the good acceleration and hull traverse, the poor top speed will result in long trips across large maps and between capture points compared to other reserve tanks.

=== Modifications and economy ===
{{Specs-Economy}}

== Armaments ==
{{Specs-Tank-Armaments}}
=== Main armament ===
{{Specs-Tank-Weapon|1}}

{{main|Type 90 (57 mm)}}

{| class="wikitable" style="text-align:center" width="100%"
|-
! colspan="5" | [[Type 90 (57 mm)|57 mm Type 90]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
|-
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
! Stock !! Upgraded !! Full !! Expert !! Aced
! Stock !! Full !! Expert !! Aced
|-
! ''Arcade''
| rowspan="2" | 100 || rowspan="2" | -15°/+20° || rowspan="2" | ±180° || rowspan="2" | Vertical || 14.47 || 20.03 || 24.32 || 26.90 || 28.61 || rowspan="2" | 4.29 || rowspan="2" | 3.80 || rowspan="2" | 3.50 || rowspan="2" | 3.30
|-
! ''Realistic''
| 9.04 || 10.64 || 12.92 || 14.30 || 15.20
|-
|}

==== Ammunition ====
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="8" | Penetration statistics
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! colspan="6" | Penetration @ 0° Angle of Attack (mm)
|-
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
|-
| Type 92 APHE || APHE || 21 || 21 || 19 || 16 || 14 || 13
|-
| Type 3 HEAT || HEAT || 55 || 55 || 55 || 55 || 55 || 55
|-
|}
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="10" | Shell details
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! rowspan="2" | Velocity (m/s)
! rowspan="2" | Projectile Mass (kg)
! rowspan="2" | Fuse delay (m)
! rowspan="2" | Fuse sensitivity (mm)
! rowspan="2" | Explosive Mass (TNT equivalent) (g)
! colspan="3" | Ricochet
|-
! 0% !! 50% !! 100%
|-
| Type 92 APHE || APHE || 349 || 2.58 || 1.2 || 9 || 103 || 47° || 60° || 65°
|-
| Type 3 HEAT || HEAT || 380 || 1.8 || 0.05 || 0.1 || 303.36 || 62° || 69° || 73°
|-
|}

==== [[Ammo racks]] ====
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]

{| class="wikitable" style="text-align:center"
|-
! Full ammo
! 1st rack empty
! 2nd rack empty
! 3rd rack empty
! 4th rack empty
! 5th rack empty
! Visual discrepancy
|-
| '''100''' || 97 ''(+3)'' || 61 ''(+39)'' || 49 ''(+51)'' || 13 ''(+87)'' || 1 ''(+99)'' || No
|-
|}
'''Notes''':
* The ammo racks in the I-Go Ko are rather small due to the small ammunition, and so could be hard in a casual engagement unless aimed for directly, which would be rare given the thin armour on the tank encouraging center-mass shots rather than targeted hits.
* However, to minimize racks to avoid detonation, emptying all the way to the 3rd rack at 49 total rounds will leave only two rather small racks remaining. If wanting to bring in more ammunition, removing only the ammo rack in the turret at 97 rounds will leave plenty.

=== Machine guns ===
{{Specs-Tank-Weapon|2}}

{{main|Type 91 (6.5 mm)}}

The Type 91 machine gun is mounted at the hull with limited traverse all-around. With a limited ammo per belt, the machine gun doesn't serve much except as a possible harassing tool against enemies in front.

{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="5" | [[Type 91 (6.5 mm)|6.5 mm Type 91]]
|-
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
|-
| Hull || 3,000 (30) || 499 || ±22° || ±25°
|-
|}

== Usage in battles ==

The Type 89b I-Go Ko, despite its rather sluggish looks, is a mobile tank that could use its speed to get to an enemy's flanks and cause some serious damage. The 57 mm cannon is unfortunately rather pitiful even in Rank I, with a penetration value of between 20 to 30 mm at standard combat ranges. Thus, it is best to catch an enemy by its sides in order to get through their weaker side armour. The 57 mm low-velocity shell does have an advantage of a rather prominent parabolic trajectory so it is possible to lob shells over hills to hit unsuspecting enemies behind it. This, fortunately, has changed with the addition of a High Explosive Anti-Tank (HEAT) shell which is available for this vehicle and all Japanese tanks that use the 5.7cm Type 97 cannon. This shell has 55mm of penetration at any range but still has considerable drop-off due to the low-velocity of the gun. It's a good enough anti-everything that can penetrate most targets you will meet, especially those pesky French tanks, which tend to be quite well armoured. The Type 3 HEAT shell, fortunately, has just enough penetration to get through them, although one should always try to aim for weak spots and never assume that you will penetrate no matter what.

Pretty much everything is a threat to this vehicle. '''Fast vehicles''' (BT-7, BT-5, M2A1, Tetrarch, T-60) in particular are an uneasy encounter: The I-Go is reasonably fast at close quarters, but not that fast. At close range, the I-Go's poor turret turning speed cannot follow the movement and at long range, the slow shells are a pain to aim precisely at a moving target - especially seeing as the 45mm 20-K that virtually every Soviet vehicle at this BR has can easily kill you at any range with a well-aimed shot. '''Autocanons''' (72-K GAZ AAA, Pz. II, Flakpanzer, Gepard, M13, T17E2, etc.) are the I-Go Ko's worst nightmare since they can make mincemeat of the armour in seconds without too many efforts. Plus, they are often quite fast.

=== Pros and cons ===


'''Pros:'''

* Decent forward speed
* Parabolic trajectory allows 57 mm round to hit over hills
* APHE has a huge amount of explosive mass, especially for the calibre
* Great gun depression
* Type 3 HEAT shell can get though most tanks you meet rather easily

'''Cons:'''

* Weak overall armour of 17 mm, vulnerable to any armament
* 57 mm armament has very low muzzle velocity and penetration - can struggle to hurt many of the tanks it will face, even from the sides
* Slow traverse speed even when upgraded
* Rather tall as a Rank I tank (not as bad as [[LVT(A)(1)]] though)
* Machine gun only fires forwards in a limited arc
* The only tank that isn't a threat to you is the Light Tank mk. VI AA (rank I British SPAA)

== History ==

===Development===
Japan's early pioneering into the concept of armoured warfare began as early as October 1918 during the first World War. They were able to acquire a few tank samples from the European governments, ranging from a British Mark IV tank, Medium A Whippet tanks, and Renault FT tanks. These tanks would make up Japan's first tank units in 1925. Their experiences with these tanks led to the eventual development of their own domestic tank design. The requirement for this new tank was given to the 4th Military Laboratory under the Imperial Japanese Army's jurisdiction and was mainly in charge of land vehicle development. In the summer of 1926, the first prototype was completed with the design of three turrets, one main in the middle and two smaller ones in the front and rear. The design was deemed too heavy at 18 tons and so development restarted, the initial design carrying on in the failed Type 91 and 95 tanks. During this time, a trial with a British Vickers Model C tank had the tank's gasoline engine catch fire. This prompted the Japanese to fit their tanks with a diesel engine instead. The development led to a new design in 1929, titled '''Type 89 I-Go'''. Though it is considered to be a light tank, the designation changed to a medium tank due to its weight of 10 tons.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89's construction was assigned to Sagami Arsenal, but it was subcontracted to private firms due to Sagami's lack in industry. One of the firms was Mitsubishi Heavy Industries, which developed a tank plant specifically for the Type 89. The Type 89 production officially started in 1931, with mass-production in 1933 and continued until 1939 with 404 tanks built.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

[[File:Type_89,_early_version_front_view.jpg|300px|thumb|right|Front 3/4 view of an Imperial Japanese Army Type 89a ''I-Go Ko''.]]
===Design===
The Type 89 I-Go was Japan's first domestic tank design, yet it showed a lot of features that were revolutionary and would become a trademark of the Japanese tank designs. The Type 89 I-Go had a four-man crew in the tank with two in the turret. The turret held a 57 mm low-velocity gun meant for fighting fortifications due to the tank's role as infantry support. A peculiar feature on the Type 89 was the rear machine gun on the back of the turret. This machine gun was meant to enable the Type 89 to engage forward targets with a machine gun or it's 57 mm gun and would be a design trend in future tank development.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 design changed gradually over time due to troop experience and advances in technology. For example, a small change that occurred for the Type 89 was the change of the commander's cupola from a "top hat" or "lid" design to a split hatch design. A noticeable change was in the engine when the first models produced off the lines were powered by a 118hp gasoline engine, these tanks were labelled as ''Type 89A I-Go Ko''. It wasn't until 1934 when a change to 120hp Mitsubishi diesel engine was made that the Type 89 was redesignated the ''Type 89B I-Go Otsu''. This diesel engine made the Type 89 the first mass-produced tank that uses diesel as its fuel.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 does carry its few flaws, however. The tank was quite slow at about 25 km/h (16 mph), a hindrance to mobile operations using motorized infantry that must wait for the tanks to reach the combat zone. The armour was quite thin at 17 mm and the 57 mm's anti-tank power was quite abyssal. However, against the Chinese troops from 1932 onwards, the armour and firepower flaws were small worries due to the lack of available tanks and anti-tank defences on the Chinese side.

===Combat usage===
The Type 89 was first used in 1932 in the 1st Special Tank Company after the Manchurian Incident. The company, armed with Type 89 along with Renault FT and NC tanks, took part in the conflict between China and Japan in the Shanghai Incident. The experience showed that the Type 89 performed well in comparison to the Renaults and soon the entire company was fitted with Type 89s, retiring the Renaults.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The mass production of the Type 89 from 1933 onwards allowed the formation of large tank groups in Japan, leading to the 1st and 3rd Tank Regiment in Kurume, Fukuoka with the 2nd Tank Regiment at Chiba Tank School. The 1st Tank Regiment would be deployed with the Kwantung Army in China, where it would carry the Type 89 tank in the conflict against China from 1937 onwards.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

By 1939, the Type 89 was starting to be succeeded by newer Japanese tanks, but they still served on the frontlines such as the border conflicts between Japan and the Soviet Union. In the Battle of Khalkhin Gol, the IJA's 1st Tank Corps attacked the Soviet 11th Tank and 7th Armoured brigades in July with a mixture of Type 89s, [[Chi-Ha|Type 97 mediums]], [[Ha-Go|Type 95 lights]], and tankettes in the 3rd and 4th Tank Regiments. Though the attack stirred up Soviet lines, there was no breakthrough in Soviet lines. The Soviets, armed with [[T-26|T-26]] and [[BT-5|BT]] [[BT-7|light tanks]], would soon push the Japanese back to Manchuria and have a cease-fire signed on 24 August.

Though the Type 89 was mostly withdrawn from service and replaced with the [[Ha-Go|Ha-Go]] and [[Chi-Ha|Chi-Ha]], the I-Go still served as far into the battles for the Philippines, Malaya and Burma. Some tanks saw further use as static pillboxes in the Japanese islands of the Pacific, but these tanks were vulnerable to newer anti-tank and tank technology of the Americans with their bazookas and [[M4|M4 Shermans]] once they started their island-hopping strategy against Imperial Japan.

Even after World War II, some Type 89s were still seen in service of the French during the First Indochina War, using the captured Japanese armour in a unit known as 'Commando Blindé du Cambodge'.

===Surviving Tanks===
[[File:Type 89b I-Go at Tsuchira.jpg|thumb|Restored Type 89b ''I-Go Otsu'' at Tsuchira tank museum open day.]]
{{Break}}
Many Type 89 relics still are visible in the wild usually reduced to a wreck with a handful of tanks still being in a good condition. These in good condition are located in:

* The Ordnance Training Support Facility, Ft. Lee, VA, USA.
* The Japanese Ground Self-Defense Force base at Tsuchiura, Ibaraki, Japan.
* Sinbudai Old Weapon Museum, Camp Asaka, Japan
* Villa Escudero, Tiaong, Quezon Province, Philippines

Only 1 I-Go Otsu remains in running condition, which was restored at the JGSDF base at Tsuchiura together with the last [[Chi-Nu|Type 3 ''Chi-Nu'']] to still exist. Both are stored on military ground so aren't at all times in public display. The I-Go Otsu usually makes an appearance during the open day of the Tsuchiura base. The vehicle can be seen in [[#Media|media]] still running after being restored by the JGSDF.

== Media ==


;Skins
* [https://live.warthunder.com/feed/camouflages/?vehicle=jp_type_89b_i_go_otsu Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]

;Images
<gallery mode="packed-hover" heights="250px">
ChiNuIGo.png|Type 3 Chi-Nu & Type 89 I-Go on display, The first and last Japanese Army production medium tank.
ArtImage I-Go Ko.png|Type 89 I-Go assaulting on White Rock Fortress.
</gallery>

;Videos
{{Youtube-gallery|p9_XD0TgdiA|'''TOP 5 Reserve Tanks''' discusses the {{PAGENAME}} at 2:23 - ''War Thunder Official Channel''|b16n19phUBI|Type 89 I-Go Japanese medium tank|c8WHPgdkdOc|Type 89 IJA training exercise - September 1941|LBM3eMJJRjg|Type 89b - Running at Tsuchiura, Japan|0snxs-JL8i8|Look at interior of a Type 89}}

== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
* ''reference to the series of the vehicles;''
* ''links to approximate analogues of other nations and research trees.''

== External links ==


* [[wt:en/news/4341-development-type-89-i-go-ko-first-series-en/|[Devblog] Type 89 I-Go Ko: First Series]]

=== References ===
<references />

{{Japan light tanks}}

I-Go Ko

2021-08-10T23:33:06Z

U106763829: /* Survivability and armour */ Corrected some grammar, made the page easier to read.

{{About
| about = '''Type 89 I-Go'''
| usage = equipment of the same adoption year
| link = Type 89 (Disambiguation)
}}
{{Specs-Card
|code=jp_type_89b_i_go_otsu
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
}}

== Description ==

The '''{{Specs|name}}''' is a reserve rank {{Specs|rank}} Japanese light tank {{Battle-rating}}. It was introduced in [[Update 1.65 "Way of the Samurai"]] along with the rest of the initial Japanese Ground Forces Tree.

The I-Go Ko is quite an average starting tank; it isn't absolutely awful it's not exactly great either. The tank's armour is virtually non-existent, with a mere 17mm of flat armor protecting the tightly-packed crew. The engine has good acceleration but caps out at 27 kph, which is decent and helps in close range engagements. The 57mm main gun has decent HEAT rounds that can penetrate 55mm of armour, which is good for the [[BR]]. APHE rounds are also available, but due to their poor penetration, they aren't very useful against even other reserve tanks. Also, the gun has very poor shell velocity, so take care when aiming. All in all, the tank is a jack-of-all-trades, master of none for Rank I.

== General info ==
=== Survivability and armour ===
{{Specs-Tank-Armour}}

The armour on the I-Go Ko is quite lacking against contemporary enemies, which is to say that it may as well not exist. With an armour thickness of less than 20 mm (aside from the spaced areas) all over, even large-calibre machine guns can penetrate the tank frontally. Not to mention, the front armour of 17 mm is only mildly sloped and presents a large target that can knock out every crew member with a single penetration. Never rely on your armour and never advance on an enemy unless they are incapacitated (i.e. gunner or cannon knocked out).

'''Armour type:'''

* Rolled homogeneous armour

{| class="wikitable"
|-
! Armour !! Front !! Sides !! Rear !! Roof
|-
| Hull || 17 mm (32°) ''Front glacis'' || 17 mm ''Top'' 17 + 17 mm ''Bottom'' || 17 mm (61°) ''Top'' 17 mm ''Bottom'' || 10 mm
|-
| Turret || 17 mm (9°) ''Turret front'' 25 mm (10°) ''Gun mantlet'' || 15 mm (10-12°) || 15 mm (11°) || 10 mm
|-
! Armour !! Sides !! Roof
|-
| Cupola || 15 mm || 10 mm
|}

'''Notes:'''

* Suspension wheels and tracks are both 15 mm thick.

=== Mobility ===
{{Specs-Tank-Mobility}}


{{tankMobility|abMinHp=183|rbMinHp=104}}

Like the armour, the {{PAGENAME}} leaves much to be desired in the tank's top speed that limits the utility of the quick acceleration. That's not the say that the tank is not manoeuvrable, rather, the opposite - the tank can turn and accelerate quite well. It's just the top speed that lets you down.

=== Modifications and economy ===
{{Specs-Economy}}

== Armaments ==
{{Specs-Tank-Armaments}}
=== Main armament ===
{{Specs-Tank-Weapon|1}}

{{main|Type 90 (57 mm)}}

{| class="wikitable" style="text-align:center" width="100%"
|-
! colspan="5" | [[Type 90 (57 mm)|57 mm Type 90]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
|-
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
! Stock !! Upgraded !! Full !! Expert !! Aced
! Stock !! Full !! Expert !! Aced
|-
! ''Arcade''
| rowspan="2" | 100 || rowspan="2" | -15°/+20° || rowspan="2" | ±180° || rowspan="2" | Vertical || 14.47 || 20.03 || 24.32 || 26.90 || 28.61 || rowspan="2" | 4.29 || rowspan="2" | 3.80 || rowspan="2" | 3.50 || rowspan="2" | 3.30
|-
! ''Realistic''
| 9.04 || 10.64 || 12.92 || 14.30 || 15.20
|-
|}

==== Ammunition ====
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="8" | Penetration statistics
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! colspan="6" | Penetration @ 0° Angle of Attack (mm)
|-
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
|-
| Type 92 APHE || APHE || 21 || 21 || 19 || 16 || 14 || 13
|-
| Type 3 HEAT || HEAT || 55 || 55 || 55 || 55 || 55 || 55
|-
|}
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="10" | Shell details
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! rowspan="2" | Velocity (m/s)
! rowspan="2" | Projectile Mass (kg)
! rowspan="2" | Fuse delay (m)
! rowspan="2" | Fuse sensitivity (mm)
! rowspan="2" | Explosive Mass (TNT equivalent) (g)
! colspan="3" | Ricochet
|-
! 0% !! 50% !! 100%
|-
| Type 92 APHE || APHE || 349 || 2.58 || 1.2 || 9 || 103 || 47° || 60° || 65°
|-
| Type 3 HEAT || HEAT || 380 || 1.8 || 0.05 || 0.1 || 303.36 || 62° || 69° || 73°
|-
|}

==== [[Ammo racks]] ====
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]

{| class="wikitable" style="text-align:center"
|-
! Full ammo
! 1st rack empty
! 2nd rack empty
! 3rd rack empty
! 4th rack empty
! 5th rack empty
! Visual discrepancy
|-
| '''100''' || 97 ''(+3)'' || 61 ''(+39)'' || 49 ''(+51)'' || 13 ''(+87)'' || 1 ''(+99)'' || No
|-
|}
'''Recommendations:'''
The ammo racks in the I-Go Ko are rather small due to the small ammunition, and so could be hard in a casual engagement unless aimed for directly, which would be rare given the thin armour on the tank encouraging center-mass shots rather than targeted hits.

However, to minimize racks to avoid detonation, emptying all the way to the 3rd rack at 49 total rounds will leave only two rather small racks remaining. If wanting to bring in more ammunition, removing only the ammo rack in the turret at 97 rounds will leave plenty.

=== Machine guns ===
{{Specs-Tank-Weapon|2}}

{{main|Type 91 (6.5 mm)}}

The Type 91 machine gun is mounted at the hull with limited traverse all-around. With a limited ammo per belt, the machine gun doesn't serve much except as a possible harassing tool against enemies in front.

{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="5" | [[Type 91 (6.5 mm)|6.5 mm Type 91]]
|-
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
|-
| Hull || 3,000 (30) || 499 || ±22° || ±25°
|-
|}

== Usage in battles ==

The Type 89b I-Go Ko, despite its rather sluggish looks, is a mobile tank that could use its speed to get to an enemy's flanks and cause some serious damage. The 57 mm cannon is unfortunately rather pitiful even in Rank I, with a penetration value of between 20 to 30 mm at standard combat ranges. Thus, it is best to catch an enemy by its sides in order to get through their weaker side armour. The 57 mm low-velocity shell does have an advantage of a rather prominent parabolic trajectory so it is possible to lob shells over hills to hit unsuspecting enemies behind it. This, fortunately, has changed with the addition of a High Explosive Anti-Tank (HEAT) shell which is available for this vehicle and all Japanese tanks that use the 5.7cm Type 97 cannon. This shell has 55mm of penetration at any range but still has considerable drop-off due to the low-velocity of the gun. It's a good enough anti-everything that can penetrate most targets you will meet, especially those pesky French tanks, which tend to be quite well armoured. The Type 3 HEAT shell, fortunately, has just enough penetration to get through them, although one should always try to aim for weak spots and never assume that you will penetrate no matter what.

Pretty much everything is a threat to this vehicle. '''Fast vehicles''' (BT-7, BT-5, M2A1, Tetrarch, T-60) in particular are an uneasy encounter: The I-Go is reasonably fast at close quarters, but not that fast. At close range, the I-Go's poor turret turning speed cannot follow the movement and at long range, the slow shells are a pain to aim precisely at a moving target - especially seeing as the 45mm 20-K that virtually every Soviet vehicle at this BR has can easily kill you at any range with a well-aimed shot. '''Autocanons''' (72-K GAZ AAA, Pz. II, Flakpanzer, Gepard, M13, T17E2, etc.) are the I-Go Ko's worst nightmare since they can make mincemeat of the armour in seconds without too many efforts. Plus, they are often quite fast.

=== Pros and cons ===


'''Pros:'''

* Decent forward speed
* Parabolic trajectory allows 57 mm round to hit over hills
* APHE has a huge amount of explosive mass, especially for the calibre
* Great gun depression
* Type 3 HEAT shell can get though most tanks you meet rather easily

'''Cons:'''

* Weak overall armour of 17 mm, vulnerable to any armament
* 57 mm armament has very low muzzle velocity and penetration - can struggle to hurt many of the tanks it will face, even from the sides
* Slow traverse speed even when upgraded
* Rather tall as a Rank I tank (not as bad as [[LVT(A)(1)]] though)
* Machine gun only fires forwards in a limited arc
* The only tank that isn't a threat to you is the Light Tank mk. VI AA (rank I British SPAA)

== History ==

===Development===
Japan's early pioneering into the concept of armoured warfare began as early as October 1918 during the first World War. They were able to acquire a few tank samples from the European governments, ranging from a British Mark IV tank, Medium A Whippet tanks, and Renault FT tanks. These tanks would make up Japan's first tank units in 1925. Their experiences with these tanks led to the eventual development of their own domestic tank design. The requirement for this new tank was given to the 4th Military Laboratory under the Imperial Japanese Army's jurisdiction and was mainly in charge of land vehicle development. In the summer of 1926, the first prototype was completed with the design of three turrets, one main in the middle and two smaller ones in the front and rear. The design was deemed too heavy at 18 tons and so development restarted, the initial design carrying on in the failed Type 91 and 95 tanks. During this time, a trial with a British Vickers Model C tank had the tank's gasoline engine catch fire. This prompted the Japanese to fit their tanks with a diesel engine instead. The development led to a new design in 1929, titled '''Type 89 I-Go'''. Though it is considered to be a light tank, the designation changed to a medium tank due to its weight of 10 tons.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89's construction was assigned to Sagami Arsenal, but it was subcontracted to private firms due to Sagami's lack in industry. One of the firms was Mitsubishi Heavy Industries, which developed a tank plant specifically for the Type 89. The Type 89 production officially started in 1931, with mass-production in 1933 and continued until 1939 with 404 tanks built.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

[[File:Type_89,_early_version_front_view.jpg|300px|thumb|right|Front 3/4 view of an Imperial Japanese Army Type 89a ''I-Go Ko''.]]
===Design===
The Type 89 I-Go was Japan's first domestic tank design, yet it showed a lot of features that were revolutionary and would become a trademark of the Japanese tank designs. The Type 89 I-Go had a four-man crew in the tank with two in the turret. The turret held a 57 mm low-velocity gun meant for fighting fortifications due to the tank's role as infantry support. A peculiar feature on the Type 89 was the rear machine gun on the back of the turret. This machine gun was meant to enable the Type 89 to engage forward targets with a machine gun or it's 57 mm gun and would be a design trend in future tank development.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 design changed gradually over time due to troop experience and advances in technology. For example, a small change that occurred for the Type 89 was the change of the commander's cupola from a "top hat" or "lid" design to a split hatch design. A noticeable change was in the engine when the first models produced off the lines were powered by a 118hp gasoline engine, these tanks were labelled as ''Type 89A I-Go Ko''. It wasn't until 1934 when a change to 120hp Mitsubishi diesel engine was made that the Type 89 was redesignated the ''Type 89B I-Go Otsu''. This diesel engine made the Type 89 the first mass-produced tank that uses diesel as its fuel.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 does carry its few flaws, however. The tank was quite slow at about 25 km/h (16 mph), a hindrance to mobile operations using motorized infantry that must wait for the tanks to reach the combat zone. The armour was quite thin at 17 mm and the 57 mm's anti-tank power was quite abyssal. However, against the Chinese troops from 1932 onwards, the armour and firepower flaws were small worries due to the lack of available tanks and anti-tank defences on the Chinese side.

===Combat usage===
The Type 89 was first used in 1932 in the 1st Special Tank Company after the Manchurian Incident. The company, armed with Type 89 along with Renault FT and NC tanks, took part in the conflict between China and Japan in the Shanghai Incident. The experience showed that the Type 89 performed well in comparison to the Renaults and soon the entire company was fitted with Type 89s, retiring the Renaults.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The mass production of the Type 89 from 1933 onwards allowed the formation of large tank groups in Japan, leading to the 1st and 3rd Tank Regiment in Kurume, Fukuoka with the 2nd Tank Regiment at Chiba Tank School. The 1st Tank Regiment would be deployed with the Kwantung Army in China, where it would carry the Type 89 tank in the conflict against China from 1937 onwards.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

By 1939, the Type 89 was starting to be succeeded by newer Japanese tanks, but they still served on the frontlines such as the border conflicts between Japan and the Soviet Union. In the Battle of Khalkhin Gol, the IJA's 1st Tank Corps attacked the Soviet 11th Tank and 7th Armoured brigades in July with a mixture of Type 89s, [[Chi-Ha|Type 97 mediums]], [[Ha-Go|Type 95 lights]], and tankettes in the 3rd and 4th Tank Regiments. Though the attack stirred up Soviet lines, there was no breakthrough in Soviet lines. The Soviets, armed with [[T-26|T-26]] and [[BT-5|BT]] [[BT-7|light tanks]], would soon push the Japanese back to Manchuria and have a cease-fire signed on 24 August.

Though the Type 89 was mostly withdrawn from service and replaced with the [[Ha-Go|Ha-Go]] and [[Chi-Ha|Chi-Ha]], the I-Go still served as far into the battles for the Philippines, Malaya and Burma. Some tanks saw further use as static pillboxes in the Japanese islands of the Pacific, but these tanks were vulnerable to newer anti-tank and tank technology of the Americans with their bazookas and [[M4|M4 Shermans]] once they started their island-hopping strategy against Imperial Japan.

Even after World War II, some Type 89s were still seen in service of the French during the First Indochina War, using the captured Japanese armour in a unit known as 'Commando Blindé du Cambodge'.

===Surviving Tanks===
[[File:Type 89b I-Go at Tsuchira.jpg|thumb|Restored Type 89b ''I-Go Otsu'' at Tsuchira tank museum open day.]]
{{Break}}
Many Type 89 relics still are visible in the wild usually reduced to a wreck with a handful of tanks still being in a good condition. These in good condition are located in:

* The Ordnance Training Support Facility, Ft. Lee, VA, USA.
* The Japanese Ground Self-Defense Force base at Tsuchiura, Ibaraki, Japan.
* Sinbudai Old Weapon Museum, Camp Asaka, Japan
* Villa Escudero, Tiaong, Quezon Province, Philippines

Only 1 I-Go Otsu remains in running condition, which was restored at the JGSDF base at Tsuchiura together with the last [[Chi-Nu|Type 3 ''Chi-Nu'']] to still exist. Both are stored on military ground so aren't at all times in public display. The I-Go Otsu usually makes an appearance during the open day of the Tsuchiura base. The vehicle can be seen in [[#Media|media]] still running after being restored by the JGSDF.

== Media ==


;Skins

* [https://live.warthunder.com/feed/camouflages/?vehicleCountry=japan&vehicleType=tank&vehicleClass=light_tank&vehicle=jp_type_89b_i_go_otsu Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]

;Images
<gallery mode="packed-hover" heights="250px">
ChiNuIGo.png|Type 3 Chi-Nu & Type 89 I-Go on display, The first and last Japanese Army production medium tank.
ArtImage I-Go Ko.png|Type 89 I-Go assaulting on White Rock Fortress.
</gallery>

;Videos

* '''In-Game'''
{{Youtube-gallery|p9_XD0TgdiA|'''TOP 5 Reserve Tanks''' discusses the {{PAGENAME}} at 2:23 - ''War Thunder Official Channel''}}

* '''Historical'''
{{Youtube-gallery|b16n19phUBI|Type 89 I-Go Japanese medium tank|c8WHPgdkdOc|Type 89 IJA training exercise - September 1941|LBM3eMJJRjg|Type 89b - Running at Tsuchiura, Japan|0snxs-JL8i8|Look at interior of a Type 89}}

== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''

* ''reference to the series of the vehicles;''
* ''links to approximate analogues of other nations and research trees.''

== External links ==


* [[wt:en/news/4341-development-type-89-i-go-ko-first-series-en/|[Devblog] Type 89 I-Go Ko: First Series]]

=== References ===
<references />

{{Japan light tanks}}

I-Go Ko

2021-08-10T23:29:52Z

U106763829: /* Description */ Summarized and corrected some light grammar mistakes, made the article summary easier to read.

{{About
| about = '''Type 89 I-Go'''
| usage = equipment of the same adoption year
| link = Type 89 (Disambiguation)
}}
{{Specs-Card
|code=jp_type_89b_i_go_otsu
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
}}

== Description ==

The '''{{Specs|name}}''' is a reserve rank {{Specs|rank}} Japanese light tank {{Battle-rating}}. It was introduced in [[Update 1.65 "Way of the Samurai"]] along with the rest of the initial Japanese Ground Forces Tree.

The I-Go Ko is quite an average starting tank; it isn't absolutely awful it's not exactly great either. The tank's armour is virtually non-existent, with a mere 17mm of flat armor protecting the tightly-packed crew. The engine has good acceleration but caps out at 27 kph, which is decent and helps in close range engagements. The 57mm main gun has decent HEAT rounds that can penetrate 55mm of armour, which is good for the [[BR]]. APHE rounds are also available, but due to their poor penetration, they aren't very useful against even other reserve tanks. Also, the gun has very poor shell velocity, so take care when aiming. All in all, the tank is a jack-of-all-trades, master of none for Rank I.

== General info ==
=== Survivability and armour ===
{{Specs-Tank-Armour}}

Armour on the I-Go Ko is considered quite lacking against contemporary enemies, which is to say that it may as well not exist. At armour thickness all less than 20 mm (aside from the spaced areas), even large-calibre machine guns can penetrate the armour. Not to mention, the front armour of 17 mm is only mildly sloped and presents a large hull target that can knock out every crew with a single penetration. Never rely on your armour, never advance on an enemy unless they are incapacitated (i.e. gunner or cannon knocked out).

'''Armour type:'''

* Rolled homogeneous armour

{| class="wikitable"
|-
! Armour !! Front !! Sides !! Rear !! Roof
|-
| Hull || 17 mm (32°) ''Front glacis'' || 17 mm ''Top'' 17 + 17 mm ''Bottom'' || 17 mm (61°) ''Top'' 17 mm ''Bottom'' || 10 mm
|-
| Turret || 17 mm (9°) ''Turret front'' 25 mm (10°) ''Gun mantlet'' || 15 mm (10-12°) || 15 mm (11°) || 10 mm
|-
! Armour !! Sides !! Roof
|-
| Cupola || 15 mm || 10 mm
|}

'''Notes:'''

* Suspension wheels and tracks are both 15 mm thick.

=== Mobility ===
{{Specs-Tank-Mobility}}


{{tankMobility|abMinHp=183|rbMinHp=104}}

Like the armour, the {{PAGENAME}} leaves much to be desired in the tank's top speed that limits the utility of the quick acceleration. That's not the say that the tank is not manoeuvrable, rather, the opposite - the tank can turn and accelerate quite well. It's just the top speed that lets you down.

=== Modifications and economy ===
{{Specs-Economy}}

== Armaments ==
{{Specs-Tank-Armaments}}
=== Main armament ===
{{Specs-Tank-Weapon|1}}

{{main|Type 90 (57 mm)}}

{| class="wikitable" style="text-align:center" width="100%"
|-
! colspan="5" | [[Type 90 (57 mm)|57 mm Type 90]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
|-
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
! Stock !! Upgraded !! Full !! Expert !! Aced
! Stock !! Full !! Expert !! Aced
|-
! ''Arcade''
| rowspan="2" | 100 || rowspan="2" | -15°/+20° || rowspan="2" | ±180° || rowspan="2" | Vertical || 14.47 || 20.03 || 24.32 || 26.90 || 28.61 || rowspan="2" | 4.29 || rowspan="2" | 3.80 || rowspan="2" | 3.50 || rowspan="2" | 3.30
|-
! ''Realistic''
| 9.04 || 10.64 || 12.92 || 14.30 || 15.20
|-
|}

==== Ammunition ====
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="8" | Penetration statistics
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! colspan="6" | Penetration @ 0° Angle of Attack (mm)
|-
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
|-
| Type 92 APHE || APHE || 21 || 21 || 19 || 16 || 14 || 13
|-
| Type 3 HEAT || HEAT || 55 || 55 || 55 || 55 || 55 || 55
|-
|}
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="10" | Shell details
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! rowspan="2" | Velocity (m/s)
! rowspan="2" | Projectile Mass (kg)
! rowspan="2" | Fuse delay (m)
! rowspan="2" | Fuse sensitivity (mm)
! rowspan="2" | Explosive Mass (TNT equivalent) (g)
! colspan="3" | Ricochet
|-
! 0% !! 50% !! 100%
|-
| Type 92 APHE || APHE || 349 || 2.58 || 1.2 || 9 || 103 || 47° || 60° || 65°
|-
| Type 3 HEAT || HEAT || 380 || 1.8 || 0.05 || 0.1 || 303.36 || 62° || 69° || 73°
|-
|}

==== [[Ammo racks]] ====
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]

{| class="wikitable" style="text-align:center"
|-
! Full ammo
! 1st rack empty
! 2nd rack empty
! 3rd rack empty
! 4th rack empty
! 5th rack empty
! Visual discrepancy
|-
| '''100''' || 97 ''(+3)'' || 61 ''(+39)'' || 49 ''(+51)'' || 13 ''(+87)'' || 1 ''(+99)'' || No
|-
|}
'''Recommendations:'''
The ammo racks in the I-Go Ko are rather small due to the small ammunition, and so could be hard in a casual engagement unless aimed for directly, which would be rare given the thin armour on the tank encouraging center-mass shots rather than targeted hits.

However, to minimize racks to avoid detonation, emptying all the way to the 3rd rack at 49 total rounds will leave only two rather small racks remaining. If wanting to bring in more ammunition, removing only the ammo rack in the turret at 97 rounds will leave plenty.

=== Machine guns ===
{{Specs-Tank-Weapon|2}}

{{main|Type 91 (6.5 mm)}}

The Type 91 machine gun is mounted at the hull with limited traverse all-around. With a limited ammo per belt, the machine gun doesn't serve much except as a possible harassing tool against enemies in front.

{| class="wikitable" style="text-align:center" width="50%"
|-
! colspan="5" | [[Type 91 (6.5 mm)|6.5 mm Type 91]]
|-
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
|-
| Hull || 3,000 (30) || 499 || ±22° || ±25°
|-
|}

== Usage in battles ==

The Type 89b I-Go Ko, despite its rather sluggish looks, is a mobile tank that could use its speed to get to an enemy's flanks and cause some serious damage. The 57 mm cannon is unfortunately rather pitiful even in Rank I, with a penetration value of between 20 to 30 mm at standard combat ranges. Thus, it is best to catch an enemy by its sides in order to get through their weaker side armour. The 57 mm low-velocity shell does have an advantage of a rather prominent parabolic trajectory so it is possible to lob shells over hills to hit unsuspecting enemies behind it. This, fortunately, has changed with the addition of a High Explosive Anti-Tank (HEAT) shell which is available for this vehicle and all Japanese tanks that use the 5.7cm Type 97 cannon. This shell has 55mm of penetration at any range but still has considerable drop-off due to the low-velocity of the gun. It's a good enough anti-everything that can penetrate most targets you will meet, especially those pesky French tanks, which tend to be quite well armoured. The Type 3 HEAT shell, fortunately, has just enough penetration to get through them, although one should always try to aim for weak spots and never assume that you will penetrate no matter what.

Pretty much everything is a threat to this vehicle. '''Fast vehicles''' (BT-7, BT-5, M2A1, Tetrarch, T-60) in particular are an uneasy encounter: The I-Go is reasonably fast at close quarters, but not that fast. At close range, the I-Go's poor turret turning speed cannot follow the movement and at long range, the slow shells are a pain to aim precisely at a moving target - especially seeing as the 45mm 20-K that virtually every Soviet vehicle at this BR has can easily kill you at any range with a well-aimed shot. '''Autocanons''' (72-K GAZ AAA, Pz. II, Flakpanzer, Gepard, M13, T17E2, etc.) are the I-Go Ko's worst nightmare since they can make mincemeat of the armour in seconds without too many efforts. Plus, they are often quite fast.

=== Pros and cons ===


'''Pros:'''

* Decent forward speed
* Parabolic trajectory allows 57 mm round to hit over hills
* APHE has a huge amount of explosive mass, especially for the calibre
* Great gun depression
* Type 3 HEAT shell can get though most tanks you meet rather easily

'''Cons:'''

* Weak overall armour of 17 mm, vulnerable to any armament
* 57 mm armament has very low muzzle velocity and penetration - can struggle to hurt many of the tanks it will face, even from the sides
* Slow traverse speed even when upgraded
* Rather tall as a Rank I tank (not as bad as [[LVT(A)(1)]] though)
* Machine gun only fires forwards in a limited arc
* The only tank that isn't a threat to you is the Light Tank mk. VI AA (rank I British SPAA)

== History ==

===Development===
Japan's early pioneering into the concept of armoured warfare began as early as October 1918 during the first World War. They were able to acquire a few tank samples from the European governments, ranging from a British Mark IV tank, Medium A Whippet tanks, and Renault FT tanks. These tanks would make up Japan's first tank units in 1925. Their experiences with these tanks led to the eventual development of their own domestic tank design. The requirement for this new tank was given to the 4th Military Laboratory under the Imperial Japanese Army's jurisdiction and was mainly in charge of land vehicle development. In the summer of 1926, the first prototype was completed with the design of three turrets, one main in the middle and two smaller ones in the front and rear. The design was deemed too heavy at 18 tons and so development restarted, the initial design carrying on in the failed Type 91 and 95 tanks. During this time, a trial with a British Vickers Model C tank had the tank's gasoline engine catch fire. This prompted the Japanese to fit their tanks with a diesel engine instead. The development led to a new design in 1929, titled '''Type 89 I-Go'''. Though it is considered to be a light tank, the designation changed to a medium tank due to its weight of 10 tons.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89's construction was assigned to Sagami Arsenal, but it was subcontracted to private firms due to Sagami's lack in industry. One of the firms was Mitsubishi Heavy Industries, which developed a tank plant specifically for the Type 89. The Type 89 production officially started in 1931, with mass-production in 1933 and continued until 1939 with 404 tanks built.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

[[File:Type_89,_early_version_front_view.jpg|300px|thumb|right|Front 3/4 view of an Imperial Japanese Army Type 89a ''I-Go Ko''.]]
===Design===
The Type 89 I-Go was Japan's first domestic tank design, yet it showed a lot of features that were revolutionary and would become a trademark of the Japanese tank designs. The Type 89 I-Go had a four-man crew in the tank with two in the turret. The turret held a 57 mm low-velocity gun meant for fighting fortifications due to the tank's role as infantry support. A peculiar feature on the Type 89 was the rear machine gun on the back of the turret. This machine gun was meant to enable the Type 89 to engage forward targets with a machine gun or it's 57 mm gun and would be a design trend in future tank development.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 design changed gradually over time due to troop experience and advances in technology. For example, a small change that occurred for the Type 89 was the change of the commander's cupola from a "top hat" or "lid" design to a split hatch design. A noticeable change was in the engine when the first models produced off the lines were powered by a 118hp gasoline engine, these tanks were labelled as ''Type 89A I-Go Ko''. It wasn't until 1934 when a change to 120hp Mitsubishi diesel engine was made that the Type 89 was redesignated the ''Type 89B I-Go Otsu''. This diesel engine made the Type 89 the first mass-produced tank that uses diesel as its fuel.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The Type 89 does carry its few flaws, however. The tank was quite slow at about 25 km/h (16 mph), a hindrance to mobile operations using motorized infantry that must wait for the tanks to reach the combat zone. The armour was quite thin at 17 mm and the 57 mm's anti-tank power was quite abyssal. However, against the Chinese troops from 1932 onwards, the armour and firepower flaws were small worries due to the lack of available tanks and anti-tank defences on the Chinese side.

===Combat usage===
The Type 89 was first used in 1932 in the 1st Special Tank Company after the Manchurian Incident. The company, armed with Type 89 along with Renault FT and NC tanks, took part in the conflict between China and Japan in the Shanghai Incident. The experience showed that the Type 89 performed well in comparison to the Renaults and soon the entire company was fitted with Type 89s, retiring the Renaults.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

The mass production of the Type 89 from 1933 onwards allowed the formation of large tank groups in Japan, leading to the 1st and 3rd Tank Regiment in Kurume, Fukuoka with the 2nd Tank Regiment at Chiba Tank School. The 1st Tank Regiment would be deployed with the Kwantung Army in China, where it would carry the Type 89 tank in the conflict against China from 1937 onwards.<ref name="ZalogaJapaneseTank">Zaloga Steven. ''Japanese Tanks 1939-1945'' Great Britain: Osprey Publishing Ltd., 2007</ref>

By 1939, the Type 89 was starting to be succeeded by newer Japanese tanks, but they still served on the frontlines such as the border conflicts between Japan and the Soviet Union. In the Battle of Khalkhin Gol, the IJA's 1st Tank Corps attacked the Soviet 11th Tank and 7th Armoured brigades in July with a mixture of Type 89s, [[Chi-Ha|Type 97 mediums]], [[Ha-Go|Type 95 lights]], and tankettes in the 3rd and 4th Tank Regiments. Though the attack stirred up Soviet lines, there was no breakthrough in Soviet lines. The Soviets, armed with [[T-26|T-26]] and [[BT-5|BT]] [[BT-7|light tanks]], would soon push the Japanese back to Manchuria and have a cease-fire signed on 24 August.

Though the Type 89 was mostly withdrawn from service and replaced with the [[Ha-Go|Ha-Go]] and [[Chi-Ha|Chi-Ha]], the I-Go still served as far into the battles for the Philippines, Malaya and Burma. Some tanks saw further use as static pillboxes in the Japanese islands of the Pacific, but these tanks were vulnerable to newer anti-tank and tank technology of the Americans with their bazookas and [[M4|M4 Shermans]] once they started their island-hopping strategy against Imperial Japan.

Even after World War II, some Type 89s were still seen in service of the French during the First Indochina War, using the captured Japanese armour in a unit known as 'Commando Blindé du Cambodge'.

===Surviving Tanks===
[[File:Type 89b I-Go at Tsuchira.jpg|thumb|Restored Type 89b ''I-Go Otsu'' at Tsuchira tank museum open day.]]
{{Break}}
Many Type 89 relics still are visible in the wild usually reduced to a wreck with a handful of tanks still being in a good condition. These in good condition are located in:

* The Ordnance Training Support Facility, Ft. Lee, VA, USA.
* The Japanese Ground Self-Defense Force base at Tsuchiura, Ibaraki, Japan.
* Sinbudai Old Weapon Museum, Camp Asaka, Japan
* Villa Escudero, Tiaong, Quezon Province, Philippines

Only 1 I-Go Otsu remains in running condition, which was restored at the JGSDF base at Tsuchiura together with the last [[Chi-Nu|Type 3 ''Chi-Nu'']] to still exist. Both are stored on military ground so aren't at all times in public display. The I-Go Otsu usually makes an appearance during the open day of the Tsuchiura base. The vehicle can be seen in [[#Media|media]] still running after being restored by the JGSDF.

== Media ==


;Skins

* [https://live.warthunder.com/feed/camouflages/?vehicleCountry=japan&vehicleType=tank&vehicleClass=light_tank&vehicle=jp_type_89b_i_go_otsu Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]

;Images
<gallery mode="packed-hover" heights="250px">
ChiNuIGo.png|Type 3 Chi-Nu & Type 89 I-Go on display, The first and last Japanese Army production medium tank.
ArtImage I-Go Ko.png|Type 89 I-Go assaulting on White Rock Fortress.
</gallery>

;Videos

* '''In-Game'''
{{Youtube-gallery|p9_XD0TgdiA|'''TOP 5 Reserve Tanks''' discusses the {{PAGENAME}} at 2:23 - ''War Thunder Official Channel''}}

* '''Historical'''
{{Youtube-gallery|b16n19phUBI|Type 89 I-Go Japanese medium tank|c8WHPgdkdOc|Type 89 IJA training exercise - September 1941|LBM3eMJJRjg|Type 89b - Running at Tsuchiura, Japan|0snxs-JL8i8|Look at interior of a Type 89}}

== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''

* ''reference to the series of the vehicles;''
* ''links to approximate analogues of other nations and research trees.''

== External links ==


* [[wt:en/news/4341-development-type-89-i-go-ko-first-series-en/|[Devblog] Type 89 I-Go Ko: First Series]]

=== References ===
<references />

{{Japan light tanks}}