COMITIA (Japanese: コミティア, Hepburn: Komitia) is a doujinshi convention for original doujin (self-published) works held in various locations across Japan.

[2] As an event series focusing on non-derivative work, the sale of fan art, fanzines, fan fiction, and other parody material of existing copyrighted franchises is prohibited.

It is the largest convention focused completely on original works in Japan.

[1] Various high-profile manga artists, such as Keiichi Arawi, Kenshin Shinzato [ja], and Barasui have previously exhibited at COMITIA.

A crowdfunding campaign was held in late 2020 and resulted in over ¥100 million (US$960,000) being raised to cover administrative expenses, venue fees, and the purchase of personal protective equipment for use during future events.