The was a Japanese prototype amphibious

tank A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and good battlefield mobility provided by tracks and a powerful engin ...

developed in 1945. The development status by the end of the

Pacific War The Pacific War, sometimes called the Asia–Pacific War, was the theater of World War II that was fought in Asia, the Pacific Ocean, the Indian Ocean, and Oceania. It was geographically the largest theater of the war, including the vast ...

is not clearly known. The To-Ku was large and heavy; it boasted extensive armor protection with 50 mm of armor plate in the front hull. The turret was a modified version of the one used on the

Type 97 Shinhoto Chi-Ha medium tank Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * T ...

that was fitted with a Type 1 25 mm gun and a rear facing Type 97 7.7 mm machine gun. The front hull mounted a Type 1 47 mm tank gun and a Type 97 7.7 mm machine gun. The chassis was based on the

Type 5 Chi-Ri medium tank The ("Imperial Year 2605 Medium Tank Model 9") was a medium tank developed by the Imperial Japanese Army in World War II. It was intended to be a heavier, more powerful version of Japan's prototype Type 4 Chi-To medium tank. Only one incomplete ...

and the suspension, pontoons and propulsion system were substantially the same as the

Type 3 Ka-Chi The was an amphibious medium tank developed by the Imperial Japanese Navy in World War II. The Type 3 Ka-Chi was based on an extensively modified Imperial Japanese Army Type 1 Chi-He medium tank (it had 2 more road-wheels and two more return rol ...

. According to one source, a prototype was completed by the end of the war. According to another source, a prototype was not completed by the end of the war.Hara, Tomio. "日本の戦車", p. 199.

Notes

References

* {{WWIIJapaneseAFVs 5 To-Ku Amphibious tanks