It also means " perversion " or "abnormality", especially when used as an adjective. Usage of the term hentai does not define a genre in Japan. Hentai is defined differently in English. The Oxford Dictionary Online defines hentai as "a subgenre of the Japanese genres of manga and anime, characterized by overtly sexualized characters and sexually explicit images and plots. Japanese artwork and comics serve as the first example of hentai material, coming to represent the iconic style after the publication of Azuma Hideo 's Cybele in Japanese animation anime had its first hentai, in both definitions, with the release of Wonderkid's Lolita Anime , overlooking the erotic and sexual depictions in 's One Thousand and One Arabian Nights and the bare-breasted Cleopatra in 's Cleopatra film.