O-I was the name given to a proposed series of Japanese super-heavy tanks, to be used in the Pacific Theater. The vehicle was monstrous, carrying 11 crew in its 120-ton body, but only one model was rumored to have been built in 1944 and afterward sent to Manchuria.[citation needed] Exact information is lacking however, and it is unknown whether it ever saw combat. Whereas the original plans called for three turrets for the one large cannon and two smaller guns, a more advanced experimental prototype, the Ultra-Heavy Tank OI featured no fewer than four turrets. It is unlikely that the Ultra-Heavy was ever actually built.
Introduced Year : -
Weight : 120 ton
Dimensions: 10.0 x 4.2 x 4.0(h) m
Armor (max) : 200 mm
Speed (max) : 25 km/hr
Engine : Gasoline Engine 550 PS/1500 rpm x 2
Armaments : 105 mm Cannon x 1, Type 1 47 mm x 1, Type 97 7.7 mm x 3
Crew : 11
Heavy armored and heavy armed tank. It is said that one prototype was being manufactured when WWII ended. However, according to an engineer concerned with it, it had been completed and was disassembled for dispatching to Manchuria. No photo nor drawing of O-I is known. Above is an imaginary picture.
http://www3.plala.or.jp/takihome/O-I.htm
