Description: Hentai (変態 or へんたい). Hentai or seijin-anime is a Japanese word that, in the West, is used when referring to sexually explicit or pornographic comics and animation, particularly those of Japanese origin such as anime and manga. The word hentai (変態) originates in Japan, and it means perverse sexual desire. Outside Japan, hentai is a porn genre that depicts sex acts in animations.