3 decal variants:
1. Ki-61 I Otsu, 149th Shimbu Tai, Ashyia airbase, Japan 1945
2. Ki-61 I Otsu, 244th Sentai, Chólu airbase, Japan, August 1945
3. Ki-61 I Otsu, 244th Sentai, Corp. Matsumi Nakano, Japan, Dec 1945
In total, over 3,000 pieces of all variants were produced. The Ki-61 I Otsu was the second variant, with two Ho-103 12.7mm machine guns replacing the 7.7mm machine guns of the first version. The retractable spur has been replaced with a fixed one.