A photo from a January 1943 magazine showing how the engine of a Hayabusa was changed in front line conditions.
The vintage article is about the IJAAF fighting over the India border from Burma so, although the tail marking is not visible, this Hayabusa very possibly belonged to the 50th Sentai.
Perhaps a good solution for the wrongly shaped Hasegawa Hayabusa in 1/48.
Correcting Wikipedia: "Some examples were supplied to the pro-Japanese regimes of Thailand, Manchukuo and Wang Jingwei Government as well."
As far as is know the collaborationist Government of Nanking (here) did not receive any Ki-43s. They only had a few Tachikawa Ki-9 (Spruce) and Yokosuka K2Y2. There is no photographic confirmation for Nakajima Ki-27 (Nate) either.