Gohiki no shinshi 1966 - Director: Hideo Gosha
Tatsuya Nakadai, Hisashi Igawa, Hideyo Amamoto, Chiyo Aoi, Mikijiro Hira
Oida (Tatsuya Nakadai) is serving time in prison after he killed a man and his daughter in a car accident. There he meets Sengoku, who, after seeing Oida deftly fend off a knife attacker in the prison yard, knows he's the man for a job he has in mind.
Having lost everything, Oida has nowhere and nobody to turn to upon his release, so he uncomfortably enters into an agreement with his cell mate Sengoku: in exchange for a half-share of 30,000,000 yen, he is to assassinate three strangers given to him on a list. Unknown to him, drug dealers, seeking to get back money stolen in the heist years earlier, are after the same three men. Upon meeting his first potential victim, Oida immediately regrets his decision, but, needless to say, the body count starts climbing, and he's drawn irreversibly into the vortex.