Ori no naka no yôsei aka Fairy In a Cage (1977) - Kôyû Ohara

Fairy in a Cage (Ori no naka no yosei?) aka Woman In a Cage is a 1977 Japanese pink film in Nikkatsu's Roman porno series, directed by Koyu Ohara and starring Naomi Tani.

During the latter part of World War II, Judge Murayama, head of the Japanese military police, uses his position to falsely accuse, capture, imprison and torture women in whom he is interested. Namiji Kikushima, a high-class business woman, is one such lady. Kikushima is accused of using her Ginza jewellery shop to finance an anti-government organization. Judge Murayama has Lady Kikushima arrested, and orders the new recruit Taoka to torture her. Taoka falls in love with Kikushima, at first hating torturing her then growing to enjoy it. After a long series of tortures and humiliation, while the Judge espouses his twisted version of morality, Taoka sacrifices himself to enable Lady Kikushima's escape.

Shudojo: nure nawa zange AKA Wet and Rope (1979) - Koyu Ohara

A young woman gets raped by three thugs on her wedding night while her husband is forced to watch. He then tell her to leave because his honor has been violated. She attempts to commit suicide, but a priest talks her out of it and she decides to become a nun. Once inside the convent, she is again a victim of sexual abuse.

Sudojo Lucia: kegasu AKA Sins of Sister Lucia (1978) - Koyu Ohara

SINS OF SISTER LUCIA is the story of Rumiko, the manipulative and dissolute daughter of a wealthy businessman who is discovered by her father in the midst of appalling larcenous and sexual acts. The prim daughters of Japanese tycoons do not engage in such behavior, so to correct Rumiko, she is sent to a convent. The traditional methods of “sisterly” redirection do not seem to work on the rebellious and defiant girl, even after she is indoctrinated as “Sister Lucia”. Before long punishments of all types are visited against Sister Lucia, but during one spell of restraint and confinement, two escaped convicts stumble upon our helpless heroine, they ravish her and in a fit of patient diplomacy, she convinces them to help turn the tables on her oppressors, but not for long. Eventually another turnabout is orchestrated landing “Lucia” in an even more dreadful predicament. What started as an intensely seductive cinematic affair erupts into an orgy of licentious and salaciously lewd acts that would delight any devotee of Japanese debauchery.