In 1930 six Carden Loyd Mk VI tankettes were delivered to Japan. This tankette inspired the Tokushu Keninsha (special tractor) that was created by the Hiro Motor Company. The TK was larger than the Carden Loyd and similar to the Vickers light tanks.
In the 1930s the Army requested a vehicle that could tow an armored trailer with ammunition to forward areas.
Hull was riveted. Front mounted engine, rear compartment with large access door.
Turret was traversed by using shoulder against the MG. If turret was facing forward driver couldn't open hatch. Their was asbestos insulation in the turret to reduce the heat inside.
Had a bell-crank which was invented by Major Tomio Hara. Often threw track on high speed turns.