Dokuman is an original creator known for work in manga and anime, primarily recognized for the series Naniwa Yūkyōden. Dokuman is credited as the original manga author for Naniwa Yūkyōden, a story that revolves around themes of yakuza life and comedy. This work served as the source material for a six-episode original animated video (OAV) anime series released in 1992. The story was later adapted into a live-action film titled Osaka Tough Guys, directed by Takashi Miike and released in 1995. In the film adaptation, Dokuman is credited for the original comic book upon which the screenplay is based. The available information on Dokuman is limited to these credits as the creator of Naniwa Yūkyōden.