3 decal variants:
1. Ki-61 - 17th Air Regiment, Leyte Philippines, October 1944
2. Ki-61 - 105th Air Regiment, Taichung airfield Formosa, 1945
3. Ki-61 - 59th Air Regiment, ASHIYA airfield, FUKUCKA, Japan 1944
The forward fuselage was elongated by 190 mm just after the exhaust line and forward of the windscreen to make room for the installation of Japanese 20 mm Ho-5 cannon in the fuselage decking. Several internal changes were also made. These included the simplification of several systems for increased dependability and ease of maintenance. The rear section of the fuselage was also made to be easily removable to further facilitate the ease of repair work.