What is Incest?

Incest is one of the highest-volume tags in all of hentai, featuring sexual scenarios between family members. Japanese hentai studios have long produced content in this genre, often using the oniichan (older brother), imouto (little sister), and okasan (mother) relationship archetypes. The genre is a staple of both animated studio hentai and doujinshi. In Japan, this content exists in a legal gray area that animated works navigate through fictional disclaimers. The oniichan/imouto dynamic in particular is so culturally embedded in hentai that it has become its own subgenre, with dedicated series from studios like PoRO and Bunnywalker. Incest hentai frequently intersects with milf content — stories involving a protagonist and a maternal figure — and with the onee-san archetype of older women initiating younger men. Community reception is split: some view it as pure fantasy with no real-world relevance, others avoid it entirely using iku.gg's blacklist feature. Browse the incest and imouto tags on iku.gg to explore this high-volume genre.