The Otaku Encyclopedia: An Insider's Guide to the Subculture of Cool Japan - Patrick W. Galbraith

Otaku: Nerd; geek or fanboy. Originates from a polite second-person pronoun meaning "your home" in Japanese. Since the 1980s it's been used to refer to people who are really into Japanese pop-culture, such as anime, manga, and videogames. A whole generation, previously marginalized with labels such as geek and nerd, are now calling themselves otaku with pride.