Type 5 To-Ku

{{Infobox weapon

|name=Type 5 To-Ku

|image=

|image_size =

|caption=illustration of the prototype

|type=Amphibious tank

|is_vehicle=yes

|origin= Empire of Japan

|design_date=1945

|length=10.8 m (with floats){{sfn|Tomczyk|2003|p=33}}

|width=3.0 m{{sfn|Tomczyk|2003|p=33}}

|height=3.38 m{{sfn|Tomczyk|2003|p=33}}

|weight=29.1 tons{{sfn|Tomczyk|2003|p=33}}

|suspension=bellcrank

|speed=32 km/h (land)
10 km/h (water){{sfn|Tomczyk|2003|p=33}}

|vehicle_range=320 km (unknown if referring to sea or land){{sfn|Tomczyk|2003|p=33}}

|primary_armament=Type 1 47 mm gun{{sfn|Tomczyk|2003|p=33}}

|secondary_armament=1× 25 mm gun{{sfn|Tomczyk|2003|p=33}}
2× 7.7 mm Type 97 MG's{{sfn|Tomczyk|2003|p=33}}

|armour=10–50 mm{{sfn|Tomczyk|2003|p=33}}

|engine=water-cooled 12-cylinder Mitsubishi diesel

|engine_power=240 hp{{sfn|Tomczyk|2003|p=33}}

|pw_ratio=8 hp/ton

|crew=7{{sfn|Tomczyk|2003|p=33}}

}}

The {{nihongo|Special Type 5 Launch To-Ku|特五式内火艇 トク|toku-go-shiki uchibitei To-Ku}} was a Japanese prototype amphibious tank developed in 1945.{{sfn|Tomczyk|2003|p=32}} The development status by the end of the Pacific War 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 that was fitted with a Type 1 25 mm gun and a rear facing Type 97 7.7 mm machine gun.{{sfn|Tomczyk|2003|pp=32, 43}} The front hull mounted a Type 1 47 mm tank gun and a Type 97 7.7 mm machine gun.{{sfn|Tomczyk|2003|pp=32, 33}} The chassis was based on the Type 5 Chi-Ri medium tank and the suspension, pontoons and propulsion system were substantially the same as the Type 3 Ka-Chi.{{sfn|Tomczyk|2003|pp=32, 43}} According to one source, a prototype was completed by the end of the war.{{sfn|Tomczyk|2003|p=32}} According to another source, a prototype was not completed by the end of the war.Hara, Tomio. "日本の戦車", p. 199.