Women in Heat Behind Bars (1987)

Shinobu is bullied and abused by inmates and guards and after being framed for starting a fight, is taken away and tied up by the prison's infamous Mr. Kiya. Through flashbacks, we discover why many of the women have been locked up here, and soon, in one great act of defiance, they rise up to overtake the prison in a bloody, violent riot. Can the shy Himeno ever escape this living hell?