Ecchi
Ecchi is a slang term in the Japanese language for playfully sexual actions. As an adjective, it is used with the meaning of "sexy", "dirty" or "naughty"; as a verb, means "to have sex", and as a noun, it is used to describe someone of lascivious behavior. It is softer than the Japanese word ero, and does not imply perversion in the way hentai does.
The word ecchi has been adopted by western fans of Japanese media to describe works with sexual overtones. In western culture, it has come to be used to refer to softcore or playful sexuality, as distinct from the word hentai, which connotes perversion or fetishism. Works described as ecchi by the western fans do not show sexual intercourse or genitalia, but sexual themes are referenced. Ecchi themes are a type of fan service, and can be found in most comedy shōnen and seinen manga and harem anime.
Etymology and use in Japan
The correct transcription of the word エッチ in Hepburn notation is "etchi". However, it is typically written as "ecchi" in the Western world.Etchi in and of itself is merely an abbreviation of hentai. There is no distinction between "hardcore" hentai and "softcore" etchi in proper Japanese. See Hentai#Etymology for further etymology.
Hentai was introduced in the Meiji period as a term for change of form or transformation in science and psychology. In this context, it was used to refer to disorders such as hysteria or to describe paranormal phenomena like hypnosis or telepathy. Slowly, the meaning expanded until it had the meaning of non-standard. In the 1910s, it was used in sexology in the compound expression "hentai seiyoku" and became popular within the theory of sexual deviance, published by Eiji Habuto and Jun'ichirō Sawada in 1915. In the 1920s, many publications dealt with deviant sexual desires and the ero guro nansensu movement. Goichi Matsuzawa calls it a period characterized by a "hentai boom". In the 1930s, censorship became more common, leading to fewer books being published on this theme.
After the Second World War, in the 1950s, interest in hentai was renewed, and people would sometimes refer to it just by the first English letter, H. In 1952, the magazine Shukan Asahi reported that a woman who was groped by a stranger in a movie theater reacted with "ara etchi yo". In this context, etchi should be understood as sexually forward and is synonymous to iyarashii or sukebe. From this, the word etchi started to branch off, and assume new connotations. In the 1960s, etchi started to be used by youth to refer to sex in general. By the 1980s, it was used to mean sex, as in the phrase etchi suru.
Other neologisms such as sekkusu are often used to refer to sex, in addition to the term ecchi. ''Ecchi is now used as a qualifier for anything related to erotic or pornographic content. Its exact meaning varies with context, but in general, it is most similar to the English word "naughty". The Japanese media tend to use other words, e.g. ero-manga, adult manga'', or anime / manga for persons over 18 years. The prefix "H-" is also sometimes used to refer to pornographic genres, e.g. H-anime, H-manga, etc.
Western usage
In Japan, is used to describe manga with very light or playful erotic content, such as is found in shonen manga. In western nations, though, ecchi has become the preferred term. The more explicit are more likely to be referred to as hentai in the west. This does correlate to a similar distinction in Japanese. For instance, if a young woman were to call a young man, that might be construed as flirting, whereas sounds more like condemnation.Works aimed at a female audience can contain scenes which are seen as ecchi. Examples are R-18 Love Report! from Emiko Sugi and from Risa Itō, which are aimed at the and audience, but contain rather explicit content.
Common elements of ecchi include conversations with sexual references or misunderstandings, misunderstandings in visual depictions, revealing or sexualized clothing, nudity and the portrayal of certain actions. This kind of sexuality is often used for comical effect. A typical example scene would contain a male protagonist that trips over a female character, giving the impression of sexual harassment.
The concept of ecchi is very closely related to fan service. While fan service describes every aspect to please the fans, ecchi relates to sexual themes. A special kind of fan service, that is usually bound or justified by the narrative.