Image: Type 89B Otsu (Tanks in World War Two)
Vehicle TypeMedium Tank
Origin & DesignerJapan/Mitsubishi
Numbers Produced126
Crew4 (Commander/Gunner, Loader, Hull Gunner & Driver)
Main Armament1 x Type 90 57mm L/14.4 Gun
Main Armament[@sponson_traverse]
Elevation-8° to +25°
Turret Traverse360° (Manual)
Gun Traverse[@gun_traverse]
Gun Mount[@gun_mounts]
Maximum Range[@maximum_range]
Armour Penetration[@armour_penetration]
Gun SightTelescopic
Secondary Armament2 x Type 91 6.5mm Machine Guns (Bow & Rear Turret)
Smoke Discharger[@smoke_discharger]
Ammunition Carried100 x 57mm & 2.750 x 6.5mm
Combat Weight12.791 kg
Ground Clearance0.48m
Fording Depth1.0m
Trench Crossing2.61m
Obstacle Clearance0.84m
Climbing Ability34°
RadioType 94 Mk. 4
ArmourHull Front: 17mm
Hull Sides: 17mm
Hull Rear: 17mm
Hull Top: 10mm
Hull Bottom: 6mm
Gun Mantle: 10mm
Turret Front: 15mm
Turret Sides: 15mm
Turret Rear: 15mm
Turret Top: 10mm
EngineMitsubishi A6 120 VD (Petrol)
Transmission6 Forward & 1 Reverse
Maximum Road Range170 km
Maximum Cross Country Range[@maximum_cross_country_range]
Maximum Water Range[@maximum_water_range]
Maximum Road Speed25 kph
Maximum Cross Country Speed18 kph
Maximum Water Speed[@maximum_water_speed]
NotesThe main difference between the 89A and 89B was the engine, with the 89B fitted with a diesel engine. This gave the 89B the honour of being the first diesel engined battle tank to be built in large numbers. Both models saw extensive action during the early phase of the war, but due to their slow speed and the availability of the more modern tanks like the Ha-Go and Chi-Ha, they were used in secondary theatres and roles.