Gate of Flesh (1977)

The Black Rose Gang led by Nasty Woman (Tokuko Watanabe) is providing Japanese girls as prostitutes for the USA, taking them from a reformatory school. Those who refuse are submitted to torture and killed. The physical examination and the training of the girls in the nude are actually scenes of mysoginist torture. A tough and determined girl, Maya, leads the revolt, and 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.