Comparing: O-I Experimental vs. Churchill III

Development of this superheavy tank was initiated by Colonel Iwakuro from the Army Ministry of Japan. The project was carried out by the Mitsubishi company, therefore the vehicle became known as the Mi-To. In the army, the tank was designated the O-I. Details of the project are largely unknown.

A British tank supplied to the U.S.S.R. under Lend-Lease. The U.S.S.R. received a total of 301 vehicles, with some lost at sea during transport to Murmansk.