3 decal variants:
1. Ki-60, 2nd prototype, Japan 1941
2. Ki-60, 244th Sentai, special attack unit /alternate marking/
3. Ki-60, captured by the Americans, 1945 /alternate marking/
The pilots were particularly bothered by the unusually high landing speed, resulting from the high surface load exceeding 170 kg / m2, and no one was impressed by the maximum speed of 550 km / h, which did not match the designers' calculations. Improved performance was expected in the second and third prototypes with a wing with an increased area, with a modified engine cover and interventions in the structure, aimed at overall relief. While the first and second prototypes were armed with two 12.7 mm Ho-103 machine guns mounted above the engine and two Mauser MG 151 20 mm cannons in the wing, the third prototype carried two Ho-103 machine guns instead of two wing cannons.