The Type 75 shares a number of automotive components with the Type 74 105 mm self-propelled howitzer
Japan’s defense industry used to be enormous in size during the years of World War II. However, after the end of the war, it shrank greatly to accommodate the provisions of the new Constitution. Accordingly, the Japanese defense industry is only maintained at a level sufficient to supply the Self-Defense Forces and not for export. However, this country still holds the most advanced technology, each of their products is considered the top of the world.
In 1969, Japan began to design a new type of 155 mm self-propelled howitzer, later known as the Type 75. Between 1975 and 1988, more than 200 guns were assigned to the Japan Ground Self-Defense Force, and set the stage for Japan to develop more modern war machines later.
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. Mitsubishi Heavy Industries developed the chassis, which was based on the Type 73 Armored Personnel Carrier, while the howitzer and turret were designed by Japan Steel Works. The hull and turret are made of all-welded aluminium. This provides protection from small arms fire and shell splinters. The crew of six consists of the commander, layer, two ammunition loaders, radio operator and driver.
The main armament is a domestic 155 mm / L30 howitzer, equipped with an automatic loader. It fires standard and rocket-assisted HE-FRAG projectiles, smoke and illumination projectiles, and compatible with all standard NATO 155 mm ammunition. Maximum range of fire is 19 km with standard HE-FRAG round and 24 km with rocket assisted round. Maximum rate of fire is 6 rounds per minute.
The Type 75 uses a number of automotive components of the Japanese Type 74 main battle tank. Vehicle is powered by the Mitsubishi 6 ZF diesel engine, developing 450 horsepower, for a top speed of 47 km/h, and a range of 300 km. The torsion bar suspension either side consists of six dual rubber-tyred aluminium road wheels, with the drive sprocket at the front and the sixth road wheel acting as the idler.
Starting in 1999, Type 75 was gradually replaced by the Type 99 155 mm self-propelled howitzer. All Type 75s were decommissioned by 2016.