Doujin, or doujinshi, refers to self-published works, often in the form of manga, novels, or art, created by fans or independent artists in Japan. These works can be original or based on existing characters and stories from popular media, often exploring themes or narratives that differ from the mainstream. Doujin culture is a vibrant part of Japanese fandom, with many creators showcasing their work at conventions like Comiket. The term can also encompass other creative endeavors, including music and Video Games, produced outside traditional publishing channels.