Fighter in the Wind 2004 on netflix

An account of karate competitor Choi Yeung-Eui who went to Japan after World War II to become a fighter pilot but found a very different path instead. He changed his name to Masutatsu Oyama and went across the country, defeating martial artists one after another. This film concentrates on the period when he is still young, and developing his famous karate style, Kyokushin.