At first glance, Japanese boxer Nao Tsuyama may look like any other fighter training for a match, hitting the punching bag and shadow-boxing. But the camera pans out and the audience sees him with a prosthetic leg.

This is a scene from "Gensan Punch," a film inspired by the real story of Naozumi Tsuchiyama, a now retired boxer who moved to the Philippines in 2005 after Japan's boxing rules banned him from going pro due to his physical disability.

The Japan-Philippine production, directed by award-winning Filipino filmmaker Brillante Mendoza, was shown during this year's Tokyo International Film Festival.