This was a commercially available radio controlled kit of a Ki-61 produced by Kyosho. The kit is sold as a 50 Size Sport Scale ARF (almost ready to fly), needing addition of radio receiver, servos, engine and fuel tank. An updated version is still available from Kyosho.
The model was built in the color scheme shown with some cockpit details and pilot figure added in the assembly.
It is powered by a Saito .72 c.i. four stroke engine and features operable flaps and retractable landing gear. Although not completely accurate in scale, it is quite convincing in flight. Wing span is 55.25" (1405mm). Oh, and it flies well.
Steve Diederich - Arkansas, USA
Thank you very much Steve for sharing photos of your excellent looking model.