Fighter in the Wind

Fighter in the Wind is a 2004 South Korean martial arts action film. It is based on the Japanese book Karate Baka Ichidai which is a fictionalized account of karate competitor Choi Yeung-Eui who went to Japan during World War II to become a fighter pilot but found a very different path instead. He changed his name to Masutatsu Oyama (大山倍達) 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. The film was the seventh highest grossing Korean film of 2004 with 2,346,446 admissions sold nationwide.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.