Kick of the Oni

(from ebookjapan):

Tadashi Sawamura (1943 – 2021) is the oriental middleweight kickboxing champion. This work depicts the life of a man who is legendary as an outstanding martial artist. His sincere way of life, in which he devotes himself to one thing and one thing only, is heartwarming.

You can learn a lot from him not only as a martial artist but also as a man and a human being!