High Quality Content by WIKIPEDIA articles! The Type 2 Ho-I (?????, Ni-shiki h?sensha?) Infantry Support Tank was an improvement over the Type 1 Chi-He medium tanks of the Imperial Japanese Army in World War II. It was designed less than a tank, and more of a self-propelled howitzer or tank destroyer for the close fire support role to provide Type 97 Chi-Ha equipped Japanese tank regiments with additional firepower against enemy armored fighting vehicles. Design work on the Type 2 Ho-I began in 1937, after experience in Manchukuo taught Army planners that an armored vehicle with a larger weapon would be useful. The Army began work on mounting a Type 41 75 mm Mountain Gun onto the chassis of the Type 97 Chi-Ha medium tank. In April 1941, the choice of the main gun was changed to the Type 99 75 mm tank gun. By 1942, with the start of World War II, the Japanese army began to encouter the Allied, the M4 Sherman or the M3 Stuart tanks, for which it had nothing comparable. The design parameters on the Type 2 were changed to give it more of a tank destroyer role, with its 75mm gun equipped with armor-piercing shells.