Nakajima Ki-43-III-b. dedicated interceptor version with 2 2cm cannon armament and a Mitsubishi 1300hp engine. 2 prototypes were built and were being tested when Japan surrendered.
Yup, you're not mistaken, Aaron, they are canted outwards. This was because during design on the prototypes, the fitting of power operated gun turrets altered the aircraft's C of G, which was cured by introducing a 4.5 degree sweepback on the wing and repositioning the hull step. The engines were not repositioned, which had little effect on the aircraft's performance.