O-I
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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 planned to be very heavy and have a crew of 11. Wikipedia
Armor: maximum of 200 mm
Crew: 11
Engine: Two V-12 gasoline engines; 550 hp (410 kW) x2
Length: 10 m
Main armament: Type 92 105 mm/L45 gun
Maximum speed: 25 km/h
No. built: 1 prototype