Do-jinshi are self-published Japanese works, usually manga or novels. They are often the work of amateurs, though some professional artists participate as a way to publish material outside the regular industry. The term do-jinshi is derived from do-jin (literally "same person," used to refer to a person or persons with whom one shares a common goal or interest) and shi (a contraction of zasshi, meaning "magazine"). Do-jinshi are part of a wider category of doujin including but not limited to art collections, anime hentai and games. Groups of do-jinshi artists refer to themselves as a circle.
Manga is the Japanese word for comics and print cartoons. Outside of Japan, it usually refers specifically to Japanese comics. As of 2006, manga represents a $5 billion global market. Manga developed from a mixture of ukiyo-e and foreign styles of drawing, and took its current form shortly after World War II. It comes mainly in black and white, except for the covers and sometimes the first few pages, and in some Animanga all the pages are colored. Popular manga are often adapted into anime (Japanese for animation) once a market interest has been established. (Manga is sometimes mistakenly called "anime" by those not familiar with the term.) Adapted stories are often modified to appeal to a more mainstream market. Although not as common, original anime is sometimes adapted into manga (such as the Gundam franchise, Neon Genesis Evangelion, Cowboy Bebop and Tenchi Muyo). (Ref wikipedia)