Near the back of an island of tables, away from the wall spaces of the east hall: a single long desk with doujinshi laid out, a colour-box and plastic bags behind. The circle’s representative sits, a friend helping beside them. Readers who queued since the first morning are pushed along, buying one copy each. A print run in the hundreds, a price around a thousand yen, each copy telling of the submission deadline to the printer, the payment to the press, and the end of an all-nighter.

An adult doujin circle (エロ同人サークル, ero doujin sakuru) is the general term for an individual or small group that produces and distributes adult self-published works, a trade that circulates work through convention tables, shop consignment and digital delivery. While keeping a production and distribution system independent of commercial publishing, it became established from the 2000s as a small-scale publishing business and a component of Japanese subculture.

Defining “circle”

The word “circle” originally meant a small school club or hobby group, but in the history of doujinshi conventions it was repurposed as the term for a participant’s production unit. The unit applying to take part in a convention is called a “circle”, and application paperwork, layout zoning and space allocation all proceed per circle. Even someone working alone applies under a “circle” name, so individual creators end up operating as circle representatives.

An adult doujin circle is one that handles adult works within this circle system. At Comiket, adult and all-ages tables are zoned separately, and adult doujinshi must be distributed in sealed plastic bags. Catalogue listings carry an adult mark, and age confirmation may take place at purchase.

Establishment as a trade

The history of doujin circles is often traced from the first Comiket (December 1975). Early doujinshi centred on manga criticism, parody and shojo-manga works, with adult works a limited share. From the 1980s “lolicon boom”, circles handling adult work grew rapidly, strengthening the role of a venue for subjects commercial magazines could not run.

Through the 1990s, the trade of specialist doujin printers became established, allowing booklets of near-commercial quality in small runs of roughly 300 to 1,000 copies. Printers published rate plans for circles and formalised submission rules, discount schemes and convention-delivery services.

From the late 1990s into the 2000s, the creator base for adult doujin work expanded alongside the growth of adult manga and adult magazines. Circles with fixed readerships appeared, and individual circles distributing several thousand copies per release ceased to be rare.

Typical circle operation

A circle’s work runs in a cycle. First comes planning and source selection: whether to handle original work or derivative work of existing manga, anime or games defines the circle’s direction. Next is drawing and writing, finishing a manga of roughly 20 to 80 pages, several short pieces, a CG set, or fiction. The finished manuscript is submitted to a printer, and the completed product received against payment.

Distribution channels often run in parallel: convention tables (Comiket, Comitia, genre-only events), consignment to doujin shops and their online stores, and digital delivery via platforms such as DLsite, FANZA Doujin, BOOTH and DMM. A circle’s revenue is the remainder after print costs, consignment fees and digital fees, with print cost the main fixed expense.

Derivative and original work

The subjects an adult doujin circle handles divide broadly into derivative and original work. Derivative work borrows characters from existing commercial manga, anime and games and is the mainstream form in Japanese doujin culture. Its copyright position rests on rightsholders’ tacit tolerance, an unstable state without explicit licence that has nonetheless continued as long-standing trade practice, while some rightsholders set explicit limits that circles must heed.

Original work uses a circle’s own characters and setting, and grew from the 2000s as commercial doujin centred on DLsite. Its detachment from commercial sources is high, and the strategy of building the circle itself into a brand works in this space. Circles exhibiting at Comitia, the original-only convention, form its main base.

Traffic with commercial publishing

Adult doujin circles regularly send creators into commercial magazines. A short piece published in a doujinshi catches an editor’s eye and leads to a serialisation or adult manga volume offer, a route normalised across the postwar period. Conversely, many creators serialising in commercial magazines run doujin activity in parallel under a circle name, and this back-and-forth forms the talent pool of Japanese adult expression. Some circles incorporate and move into commercial activity, and the boundary between doujin and commercial has dissolved further with the progress of digital doujin culture from the 2010s.

See also

• Doujinshi
• Comiket
• DLsite
• Eromanga
• BOOTH