is a 1963 Japanese yakuza film directed by Seijun Suzuki in the vein of the Nikkatsu Studio's "borderless action cinema." It starred Joe Shishido as Hideo Tajima.

Plot

Two rival gangs (the Otsuki and the Sakura) are shaken by the new arrival of a third, secret gang who is stealing arms from both them and U.S. arms shipments. Keen to track them down, private detective Hideo Tajima (Joe Shishido) who runs a small company called 'Detective Bureau 2-3' tips off the police about a possible hit against a new stash of weaponry. With the police's help, providing him with a new identity (with a new name; Tanaka), Tajima infiltrates the secret gang.