| Type 2 Ho-I | |
| Type: | Infantry support tank Assault gun |
| Is Vehicle: | yes |
| Origin: | Empire of Japan |
| Used By: | Imperial Japanese Army |
| Production Date: | 1944 |
| Number: | 31 |
| Length: | 5.73m (18.8feet) |
| Width: | 2.33m (07.64feet) |
| Height: | 2.58m (08.46feet) |
| Weight: | 16.1 tons |
| Suspension: | Bell crank |
| Speed: | 44km/h |
| Vehicle Range: | 100 km |
| Primary Armament: | 75 mm Type 99 gun |
| Secondary Armament: | 1 x 7.7 mm Type 97 machine gun |
| Armour: | 12–50 mm |
| Engine: | Mitsubishi Type 100 air cooled V-12 diesel |
| Engine Power: | 240 hp (179 kW) |
| Pw Ratio: | 14.9 hp/tonne |
| Crew: | 5 |
The was a derivative of the Type 97 Chi-Ha medium tanks of the Imperial Japanese Army in World War II. Similar in concept to the early variants of the German Panzer IV, it was designed as a self-propelled howitzer to provide the close-in fire support for standard Japanese medium tanks with additional firepower against enemy anti-tank fortifications.[1]
Design work on the Type 2 Ho-I began in 1937, after experience in Manchukuo taught Japanese war planners that an armored vehicle with a larger weapon would be useful against fortified enemy positions such as pillboxes, against which the standard low-velocity 57mm and high-velocity 47mm tank guns were ineffective. Since this vehicle was to be able to keep up with the rest of an armored formation, the Japanese began work on mounting a Type 41 75 mm mountain gun onto the chassis of the Type 97 Chi-Ha medium tank. The adapted mountain gun, known as the Type 99 75 mm tank gun, was completed in 1940. The gun could fire an assortment of ammunition, including a 6.6kg (14.5lb) armor-piercing shell and had a muzzle velocity of 445mps. By 1942 the Type 99 75 mm gun was fitted into a modified Type 97 Shinhōtō Chi-Ha turret, which resulted in the designated Type 2 Ho-I gun tank.[1] The Type 2 Ho-I gun tank was intended to be part of a fire support company in each of the tank regiments.
The 1941 prototype model, known as the Experimental Type 1 Ho-I, used the Type 97 Chi-Ha chassis. The production model utilized the chassis of the Type 1 Chi-He medium tank, which was itself a modified Type 97 Chi-Ha hull.[2]
The main armament of the Type 2 Ho-I was a Type 99 75 mm tank gun, and secondary armament was a single 7.7 mm Type 97 light machine gun in the hull.[2] The short barreled 75 mm Type 99 gun was mounted in a gun turret of the type used for the Type 97 Shinhōtō Chi-Ha tank with modifications to accommodate the gun used and the addition of a large rear hatch.
As with other tanks and self-propelled guns, production was hampered by material shortages, and by the bombing of Japan in World War II. All 31 Type 2 Ho-I tanks produced were conversions from existing Type 1 Chi-He medium tanks. There is no record of a Type 2 Ho-I being used in combat prior to the end of the war.[1] [2]