Gate of Flesh (1977)

The Black Rose Gang led by Nasty Woman (Tokuko Watanabe) is providing Japanese girls as prostitutes for Americans, taking them from a reformatory school. Those who refuse are tortured and killed. The physical examination and the training of the girls in the nude are actually scenes of misogynist torture. A tough and determined girl, Maya, leads the revolt, with vicious sword and dagger and hand-to-hand fights against male and female baddies. Maya and her group defeat and destroy the Black Rose Gang amidst bloodshed.