Final answer:
Comic Market, which drives the doujin culture, started in 1975. This event relates to Japan's history of collectible ukiyo-e prints and Kabuki theater promotion, which can be seen as a precursor to modern doujin culture.
Step-by-step explanation:
The driving force behind the creation of the doujin culture indeed has been Comic Market (Comiket), which was first convened in 1975. The Comic Market is a pivotal event for doujinshi creators and fans, facilitating the sale and distribution of self-published works. This phenomenon is rooted in Japan's historical context, where in tandem practices like the ukiyo-e woodblock prints and the Kabuki theater thrived. These prints served as a means of advertisement and were collected by fans, showing a historical precedent for the commercial and fan aspects of today's doujin culture.