Anime are often categorized by demographic target, including Kodomo (children), shojo (girls), shōnen (males) and a wide range of genres targeting an adult audience. Shoujo and Shonen anime times contain popular elements with children of both sexes, in an attempt to get the adhesion to the marriage. Adult entertainment may have a slower or more complex plot that younger audiences are generally unattractive as well as adult topics and situations. A subset of the adult anime contains pornographic elements and is labeled “R18” in Japan, but internationally these works are grouped under the term hentai (in Japanese it means “perverted”). However, a variety of anime subgenres from all demographic groups incorporate ecchi, sexual themes or curtains without depictions of sexual intercourse, as typified in the genres of comedy or harem; Due to its popularity among the elements of teenagers and amateur Adults, the incorporation of anime ecchi is considered a form of service of the fans.
Animated type classification is different from other types of animation and does not lend itself to simple identity. Gilles Poitras likened Gundam 0080 and its complex depiction of war as an anime “giant robot” similar to simply labeling the war and peace of a “war novel.” Science fiction is a great genre of anime and includes such important historical works as Astro Boy Tezuka and Tetsujin 28-go Yokoyama. One of the main sub-genres of science fiction is Mecha, with Gundam metaseries being emblematic. The various genres of fantasy include works based on Asian and Western traditions and folklore; Examples include the Japanese Feudal Fairy Tale InuYasha, and the representation of the Scandinavian goddesses who moves to Japan to hold a computer called Yggdrasil in Oh! My Goddess. The type of cross in the anime is also prevalent, such as the mixture of fantasy and comedy to the half dragon, and the incorporation of antics in the anime crime castle of Cagliostro. Other subgenres found in the anime include magical girl, harem, sports, martial arts, literary adaptations, medievalism and war.
Genres have sprung novels that explore homosexuals. Although originally pornographic terminology, yaoi (male homosexuality) and Yuri (female homosexuality) are generally used internationally to describe any focus on issues or the development of romantic sex. Before 2000, homosexual characters are generally used for the comic effect, but some works have portrayed these characters in earnest or sympathy.