This last and ultimate Japanese IJN amphibious tank was particularly massive, built on the chassis of the Type 5 Chi-Ri, with the same water-cooled 12-cylinder Mitsubishi diesel, supplying 240 hp.
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It had quite extensive armor protection (from 10 to 50 mm/0.4-1.97 in), it was fitted with a 47 mm (1.85 in) Type 1 gun in the casemate, and a secondary 25 mm (0.98 in) AT light gun Type 1 in the turret, plus two Type 97 machine guns. It weighed 29.1 tons but was slow at 32 km/h (20 mph) on land and 10 km/h (6 mph) on water.
The Type 5 To-Ku was essentially on the same vein as the previous Japanese amphibious tanks, such as the Type 2 Ka-Mi, and the Type 3 Ka-Chi. There was a central hull on which 2 pontoons were added to the bow and rear.
In total, the To-Ku was 35.4 feet long for 11.8 in width and 12.7 in height. It was assembled with welded rolled homogeneous steel plates, 10 to 50 mm (0.4-2 in) in thickness. Total weight, battle ready was 29.1 short tons, for a crew of 5 (driver, commander, gunner, loader, hull gunner/radio operator).
The turret of the To-Ku was modified from the Chi-Ha Kai. This carried a 25 mm (0.9 in) Type 1 gun, and 2 x 7.7 mm type 97 (0.3 in) machine-guns. The Tank’s main armament was a 47 mm (1.85 in) gun, mounted in the forward hull. The Type 5 To-Ku never saw service.
Type 5 To-Ku
|Dimensions||10.8 x3.6 x3.88 m|
|Weight||29 long tons|
|Crew||5 (driver, commander, gunner, loader, hull gunner/radio operator)|
|Propulsion||12-cyl Mitsubishi diesel 240 hp|
|Speed (road)||32/10 kph (land/water)|
|Armament||47mm, 20mm, 2x 0.8mm|
|Armor||10 to 50 mm/0.4-1.97 in|
|Total production||1 Prototype?|
Type 5 To-Ku in a fictional regular Imperial Japanese Navy blue-grey livery, trials, 1945.