Comfort Women (1992) aka Jun ji wei an fu

Tomi Akiyama and her boyfriend Nakamura are troubled about allegations about a Comfort House in China. Tomi gets into the camp, first as a journalist, but is then captured and sent in as a participant. Nakamura is upset by this particular event, and the situation in general, and takes action. The progress of several other characters is followed, including a kind-of happy hooker, a jovial chubby Japanese woman and a brutal and rude general, laced with stock war footage and historical inter-titles.

Female Convict 101 Sucks (1977) aka Joshûu 101: Shaburi

An obvious pink film knock-off of the "JOSHÛU SASORI" series. with much more emphasis on sex

Caged Beauties (1993) a.K.a Qiu Mei Gui

Caged Beauties tells the story of an oppressive revolutionary government randomly arresting unsuspecting citizens. The men are used to target practice and the women become prostitutes. Very grim and brutal Women In Prison flick with a huge cast of extras. The somewhat crude documentary style actual helps sell it as realistic.

Butterfly in Grey (2002) a.K.a Khang paed

Dao returns home and finds her fiance in bed with another woman. She shoots them dead on the spot. She is sentenced to 10 years in prison. She gets out eventually and stays with a friend who runs an escort service and learns that women are even caged in the outside world.