Comiket

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Comic Market (コミックマーケット, Komikku Māketto), more commonly known as Comiket (コミケット, Komiketto) and sometimes Comike (コミケ, Komike), is a biannual dōjinshi fair in Tokyo, Japan. A grassroots, DIY event focused on the sale of dōjin (self-published works), Comiket is a not-for-profit, volunteer-run event administered by the Comic Market Preparatory Committee (ComiketPC). Inaugurated on 21 December 1975, with an estimated 700 attendees, it has grown to become the largest fan convention in the world, with an estimated attendance of over half a million.

The convention takes place twice a year, at the Tokyo Big Sight.

Appearances and Mentions in Fiction:

As Comiket

Anime and Manga

Hanaukyo Maid Tai, episode 5.
Lucky Star, episode 12 - Konata complains that it's changed from a friendly get-together into a marketplace over the years. This little adventure provides the page image for Doujinshi.

As a Bland-Name Product

Anime and Manga

Comic Party uses "ComiPa" to drive its plot.
Genshiken has "ComiFes".
Yuru-Yuri has "Comuket".

Web Original

Fenspace has a "Comic Party", based on the anime and game of the same name that reference Comiket.

Other References

Anime and Manga

When aliens steal the Tokyo Big Sight in episode ___ of Mao-chan, the building is described as "the home of a convention loved by otaku" instead of being named. --- verify wording ---