Tokyo Fist

Tokyo Fist is a movie starring Kaori Fujii, Shin'ya Tsukamoto, and Kôji Tsukamoto. Suspecting that his childhood friend, a professional boxer, is having a love affair with his fiancée, a businessman starts training rigorously in...
A businessman, Tsuda, runs into a childhood friend, Kojima, on the subway. Kojima is working as a semiprofessional boxer. Tsuda soon begins to suspect that Kojima might be having an affair with his fiancée Hizuru. After an altercation, Tsuda begins training rigorously himself, leading to an extremely bloody, violent confrontation.