Anime has many genres typically found in any mass media form. Such genres include action, adventure, children’s stories, comedy, drama, erotica (more specifically ecchi or hentai), medieval fantasy, occult/horror, romance, science fiction and magical girl. Most anime includes content from several different genres, as well as a variety of thematic elements. Thus, some series may be categorized under multiple genres. For example, Neon Genesis Evangelion might be considered to fall into the genres of post-apocalyptic, science fiction, mecha, and drama.

A recent trend at Japanese cosplay events is an increase in the popularity of non-Japanese fantasy and science fiction movie characters, perhaps due to the international success of such films as The Matrix, Star Wars and Lord of the Rings. Characters from the Harry Potter films have a particularly high number of female fans in Japan, with female cosplayers playing either male or female characters, Draco Malfoy being an extremely popular choice.