Japan Steel Works
The Type 75 shares a number of automotive components with the Type 74 105 mm self-propelled howitzer, which was developed during the same time and is essentially a variant of. Mitsubishi Heavy Industries developed the chassis, while the howitzer and turret were designed by Japan Steel Works. Two prototypes were completed in 1971–72 and differed only in their loading systems. Trials were conducted 1973–74 and the howitzer was accepted for service in October 1975. It carries 28 rounds of ammunition on board.