Abashiri Prison: Duel in the South

網走番外地 南国の対決

Also known as Abashiri bangaichi: Nangoku no taiketsu

This is the sixth film in the "Abashiri Series," based on an original idea by Hajime Ito, and written and directed by Teruo Ishii of "Operation Big Bad" fame. The film was shot by Kiichi Inada, who also worked with Ito.