Hentai Anime Girl

The English use of hentai is more similar to the way the Japanese use the slang term エッチ (H or ecchi), which refers to any sexually explicit content or behaviour. The Japanese seldom use the term hentai to refer to pornography in Japan. Instead, terms such as 18-kin (18禁, literally "18-prohibited"), meaning "prohibited to those not yet 18 years old", and seijin manga (成人漫画 "adult manga") are used. Less official terms also in use include ero anime (エロアニメ), ero manga (エロ漫画), and the English acronym AV (for "adult video").
History
The earliest association between anime and adult animation occurred preceding the release of Fritz the Cat when American distributors attempted to cash in on the publicity garnered from the rating by rushing out dubbed versions of two other adult animations from Japan, both of which featured an X rating in their advertising material: Senya ichiya monogatari and Kureopatora, retitled One Thousand and One Arabian Nights and Cleopatra: Queen of Sex, respectively. However, neither film was actually submitted to the MPAA, and it is not likely that either feature would have received an X rating. One Thousand and One Nights was the first erotic animated feature film, and at 130 minutes, it remains one of the longest animated films.