Dōjin (同人), often romanized as doujin, is a general Japanese term for a group of people or friends who share an interest, activity, hobbies, or achievement. The word is sometimes translated into English as clique, coterie, society, or circle (e.g., a "sewing circle").
In Japan the term is used to refer to amateur self-published works, including but not limited to manga, novels, fan guides, art collections, music and video games. Some professional artists participate as a way to publish material outside the regular publishing industry. They're usually not sold in ordinary stores. They're sold at conventions (which are organized as fairs) or specialized doujin shops instead.
It's important to note that the Touhou Project itself is a doujin gaming series. However, inside the Touhou fandom the term doujin is commonly used to refer to only derivative works, like fangames, doujin music, fan fiction, etc.
Touhou Project has over time gained notability for the large number of circles that create Touhou fan art, comics, games, and music. The Touhou Wiki is dedicated to cataloging each and every one of those circles, to the point where the sheer number of circles seemingly comes close to breaking the wiki.
- Alstroemeria Records -- best known for their remix of Bad Apple!!
- AQUA STYLE
- IOSYS - the most common source of Touhou memes
- Silver Forest -- source of Tsurupettan
- SOUND HOLIC
- Twilight Frontier -- collaborated with ZUN to make the fighting games
- Rumbling Spell Orchestra
- Touhou Pocket Wars
- Concealed the Conclusion
- Yuka Kazami's Sunflower Field
- Seasonal Dream Vision -- a doujin anthology containing a short story by ZUN
Comiket has been where ZUN has released full versions of the majority of his games, starting with Highly Responsive to Prayers and Story of Eastern Wonderland at Comiket 52.Embodiment of Scarlet Devil was released at Comiket 62, and the first Touhou doujins were released shortly afterwards. As more and more circles created Touhou doujins, eventually entire conventions were dedicated specifically to featuring Touhou doujins.
Notable Conventions featuring Touhou:
- Comiket -- where it all began; nowadays it reserves an entire day for Touhou-related circles and Team Shanghai Alice.
- Reitaisai -- the first exclusively Touhou convention; ZUN frequently makes an appearance or announcement there
Circles such as IOSYS often make participatory videos as part of promoting their upcoming albums.
- Touhou Wiki:Community portal -- a comprehensive to-do list for the entire wiki
- Touhou Wiki:Projects -- a set of comprehensive to-do lists for pages related to Touhou