An undercover cop befriends a yakuza underling who through his contacts helps him infiltrate two rival Yakuza gangs. He pits the two rival gangs against each other in hopes that they will cross each other out.
Doberman Cop is a film version of the manga Doberman Deka released theatrically in Japan by Toei on July 2, 1977. The film was directed by Kinji Fukasaku and starred Sonny Chiba as Joji Kano .