Kotobaasobi
Kotobaasobi is a Japanese adult (18+) doujin circle that publishes adult-oriented fan works.
Last updated October 5, 2026
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Overview
Kotobaasobi is a Japanese doujin circle—that is, an independent, amateur, or semi-professional creative group—that produces adult (18+) doujin works. Its official website identifies it as an 18+ doujin circle and warns minors, people uninterested in doujin, and those who do not understand its content not to browse the site. The circle is registered on Wikidata as a Japanese doujin circle. As a doujin circle, Kotobaasobi operates within Japan's large self-published doujin market, where circles typically create and distribute manga, illustrations, games, or other derivative and original works, often circulated through conventions and specialized retail channels. The circle's public presence centers on its official website, kotobaasobi.dojin.com, which serves as its information hub and gateway to adult content. Details about its founding date, membership, and catalog of works are not provided in the available evidence.
History
Kotobaasobi (言葉遊戯) is a Japanese doujin circle, a type of independent creative group that self-publishes fan works. The circle is identified on its official website as an 18+ doujin circle, indicating that its output is adult-oriented. Its website functions as a gate and information point, warning that minors, people uninterested in doujin, and those who do not understand the content should not view the site. Wikidata records the group simply as a Japanese doujin circle. Doujin circles in Japan typically form around one or a few creators, produce works such as manga, illustrations, or games, and distribute them at events like Comiket or through specialist doujin retailers. The supplied evidence does not provide a founding date, membership details, or a catalog of specific works, so the circle's full history cannot be reconstructed here.
Products and positioning
Adult-oriented (18+) doujin circle operating in Japan's self-published fan-works market.
Product categories. adult doujin works · doujin publications
Sources2 sources
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