The term Inran suggests a shift in the characters' personalities during the ritual, often moving from resistance to a corrupted or "lewd" state. This transformation is a common plot device used to heighten the "entertainment" for the specific target audience of these works.
"Jashin Shoukan Inran Kyonyuu Oyako Ikenie Gishiki" seems to be a title that could be related to a work of fiction, possibly in the genres of fantasy or supernatural, given the elements of the title which roughly translate to "Demon Summoning, Depraved Breastfeeding, Mother-Child Sacrificial Ritual".
: "Wicked/Evil Prostitution House" or "Evil God Summoning," depending on the specific kanji used in context, though the official title uses "Wicked Whorehouse".
In conclusion, Jashin Shoukan, Inran, Kyonyuu, Oyako, Ikenie, and Gishiki are aspects of Japanese culture that are deeply rooted in the country's history, folklore, and entertainment industry. While these topics may seem unusual or provocative to outsiders, they reflect the complexity and diversity of Japanese society.