Otaku

Otaku is a Japanese consumer subculture of people with interests and hobbies that lie at the juncture of science and fantasy, especially media, productions, and pastimes such as anime, manga, video games, virtual reality, and cosplay. It began forming in the 1960s, took on its name within the subculture in the 1970s, and was popularized by a 1983 essay by Akio Nakamori in Manga Burikko. (Wikipedia)