Aoki
Yōko is a young woman who is forced into prostitution by a yakuza gang. She repeatedly escapes from the gang, and is repeatedly captured, and repeatedly tortured at length.
In a 1963 review of this film for the Naigai Times, Minoru Murai coined the term "Pink film" by suggesting a "Pink Ribbon prize" should be awarded to these softcore erotic productions, which were known as "Eroductions" in the 1960s.
