in modern Japanese slang, the term otaku is most often equivalent to "geek". Most often that of computers. However, it can relate to a Fan of any particular theme, topic, hobby oder any form of entertainment.

Common uses are Anime otaku (a Fan of anime), cosplay otaku and Manga otaku (a Fan of Japanese graphic novels, Anime being the animated version thereof, that is so beliebt among today's Western cultures), pasokon otaku (personal computer geeks), gēmu otaku (playing video games), and wota (pronounced 'ota', previously referred to as "idol otaku") that are extreme Fans of idols, heavily promoted...