Only extant Ki-61-II Kai on display at Gifu-Kakamigahara Air and Space Museum. This aircraft was formerly on display in the Peace Museum for Kamikaze Pilots at Chiran, Kyushu. Previously painted to represent a Hien (Flying Swallow) from the famous 244th Hiko-Sentai led by Maj. Teruhiko Kobayashi based at Chōfu airfield that downed B-29s, it is now in bare metal finish. The engine attachment bolt holes, supercharger air intake, landing light, oil cooler and radiator can be seen. Transfer of the Hien to Kakamigahara has significance as the sleek fighter was mass produced here during the war.