Hentai is traditional form of artistic erotica or pornographic expression in Japan. But in the western world, the Hentai porn is associated with any kind of animated pornography. The Manga or anime porn is often confounded to Hentai porn.

In Japanese, the word Hentai means transformation or aberration. This is the reason as to why Hentai porn in Japan does not mean the same as overseas. In its original country, Hentai is an almost surreal animated pornography. Hentai, in Japan, is not even associated with pornography. It is a respectful art and many drawers are dedicated to Hentai comic books. The Hentai porn became popular in Japan with magazines, than it started to be displayed in cartoon movies. The Hentai porn firstly spread all over the world as a subculture. Currently, Hentai porn is worldwide mainstream pornography niche, thanks to the internet and globalization.

The two main kinds of Hentai porn aimed to tandem heterosexual and homosexual alike.