, more commonly known as or , is a semiannual doujinshi convention in Tokyo, Japan. A grassroots market focused on the sale of doujin (self-published) works, Comiket is a not-for-profit fan convention administered by the volunteer-run Comic Market Preparatory Committee (ComiketPC). Inaugurated on 21 December 1975 with an estimated 700 attendees, Comiket has since grown to become the largest fan convention in the world, with an estimated turnstile attendance of 750,000 in 2019. Comiket is typically held at Tokyo Big Sight in August and December, with the two events distinguished as and , respectively. Programme Dōjin marketplace Comiket is focused primarily on the sale of dōjin: non-commercial, self-published works. Approximately 35,000 circles (a term for groups or individuals who create dōjin) participate in each edition of Comiket. Different circles exhibit on each day of Comiket; circles producing works on a common subject, such as a particular media franchise or manga genre, are typically grouped on the same day. The most common item sold at Comiket is dōjinshi (self-published comics, novels or magazines), while a smaller number of circles sell dōjin soft, analog (board/card/etc.) games, music, clothing, and other goods. These are often derivative fan works based on anime, video games, and other media, legal according to Japanese law (shinkokuzai). Since Comiket's inauguration, sample copies of all works sold at Comiket are collected and archived by ComiketPC, with over 2.1 million works having been archived. Trends in derivative works Cosplay Comiket is a major outlet for cosplay enthusiasts. Since Comiket 80 in 2011, restrictions on cosplaying have been gradually relaxed, with a shift from regulating objects (e.g. a ban on items that could be used as weapons) to regulating behavior (e.g. a ban on swinging around long objects). Some general contemporary guidelines include not wearing clothes that are too revealing, not imitating uniformed officers, and being out of cosplay when arriving/departing from Comiket. Corporate booths Comiket hosts 190 corporate booths each year. This includes both large commercial companies, such as video game studios and manga publishers, as well as celebrity meet and greet sessions. Operations Schedule Comiket is held twice yearly, in August and December. These events are distinguished as "Summer Comic Market" (Natsukomi) and "Winter Comic Market" (Fuyukomi). Since 1995, both events have run for three days each, with Summer Comiket generally occurring Friday to Sunday in mid-August, and Winter Comiket generally occurring the three days prior to New Year's