Kick no Oni

A proud karate expert named Tadashi Sawamura steps into the kickboxing world to prove his dominance but is brutally defeated-and knocked into a coma-by a fighter using the newer martial art. When he wakes up, his trainer, Endo, persuades him to learn kickboxing himself to reclaim his pride. The story takes loose inspiration from the real-life career of champion kickboxer Tadashi Sawamura.