4 decal variants:
1. Ki-100, 244th Air Regiment, flown by commander, Maj. Teruhiko Kobayashi, Japan, July 1945
2. Ki-100, 5th Air Regiment, Kiyosu airfield, Aichji prefecture, Japan, June 1945
3. Ki-100, 111st Air Regiment, Komaki airfield, Nagoya, Japan, August 1945
4. Ki-100, 59th Air Regiment, 3th squadron, Ashiya airfield, Fukuoka prefecture, Japan, August 1945
A total of 99 of this version was built before production was brought to an end by the growing weight of USAAF air attacks. A more effective version had been planned, to be powered by the Mitsubishi Ha-112 engine which incorporated a turbocharger to improve high-altitude performance, but only three of these Ki-100-II prototypes had been built and flown by the end of the war.