Tokyo Big Sight
Avid fans of "doujin" attend regular "doujin" conventions, the largest of which is called Comiket (a portmanteau of "Comic Market") held in the summer and winter at Tokyo Big Sight. Here, over of "doujin" materials are bought, sold, and traded by attendees. "Doujin" creators who base their materials on other creators' works normally publish in small numbers to maintain a low profile from litigation. This makes a talented creator's or circle's products a coveted commodity as only the fast or the lucky will be able to get them before they sell out.