Akiba-kei (秋葉系?) or Akiba-chan (アキバちゃん?) is a Japanese slang term for Akihabara style. Akihabara is a district in Chiyoda, Tokyo where many otaku, or obsessive anime, manga, and video game fans gather.
Akiba-kei is a Japanese slang term meaning "Akihabara style". It dates back to the early 80s and refers to a subset of otaku who spend much of their time in and around the Akihabara area of Tokyo and are known for their strong interest in "fantasy worlds...anime, manga, maids, idols, and games". Akiba-kei have also been characterized as being "interested in ruminating about domestic items and creating fan works based on these existing elements."
The Akihabara area in central Tokyo is well known as a marketplace of cutting edge technology. In recent years, it has developed strong ties to the Japanese gaming industry, as well as to anime and manga publishers. These ties are one reason why Akiba-kei culture has expanded outside its geographic area, to manifest on the Internet in the form of websites.