Given the complexity of the term, it's possible that "Jashin Shoukan Inran Kyonyuu Oyako Ikenie Gishiki" refers to a specific type of dark ritual or ceremony that involves the summoning of an evil deity. This ritual may involve themes of debauchery, sacrifice, or parent-child relationships.

: This could mean "Summoning" or being called forth. In fantasy or supernatural contexts, it often refers to the act of bringing entities from another realm into the world of the story.