A dōjin shop (同人ショップ, dōjin shoppu) is a store that specializes in dōjinshi, self-published works. They exist mainly in Japan. Dōjin shops can be both brick and mortar as well as online stores. Some sell only second-hand dōjinshi, but particularly larger chain stores also sell new dōjinshi. Many dōjin shops also handle other kinds of dōjin works, such as dōjin music or dōjin games, or commercially published popular media such as manga and anime.