Shura no MonShura no Mon.

Shura no Mon (修羅の門; lit. 'Asura's Gate') is a Japanese manga series written and illustrated by Masatoshi Kawahara. The story follows a young Karate practitioner named Tsukumo Mutsu, 40th master of the deadly Mutsu Enmei Ryu style. It was serialized in Kodansha's Monthly Shōnen Magazine from April 1987 to November 1996.