Type 89 Medium Tank "Yi-Go"
Model Ko- Introduced Year : 1929
- Weight : 11.8 ton
- Dimensions: 5.75 x 2.18 x 2.56(h) m
- Armor (max) : 17 mm
- Speed (max) : 25 km/hr
- Engine : Gasoline Engine 118 HP/1800 rpm
- Armaments : Type 90 57 mm x 1, Type 91 6.5 mm x 2
- Crew : 4
- Production Qty : 278
Model Otsu- Introduced Year : 1935
- Weight : 12.1 ton
- Dimensions: 5.75 x 2.18 x 2.56(h) m
- Armor (max) : 17 mm
- Speed (max) : 25 km/hr
- Engine : Diesel Engine 120 HP/1800 rpm
- Armaments : Type 90 57 mm x 1, Type 91 6.5 mm x 2
- Crew : 4
- Production Qty : 126
It is the first tank that was mass-produced in Japan. It was influenced by Vikers C, but its design is utterly original. The model Ko had a gasoline engine and and the model Otsu had a diesel engine.
This tank was used for infantry support mainly in China before WWII, but some were also used in the Philippines during WWII.