Talk:General Discussion/@comment-25928337-20150226023733/@comment-112.215.66.78-20150226070515

It's not just DMM but primarily Kadokawa Games and Sega, the holders of Kancolle game licenses. DMM is just a publisher. You have to remember that the Kancolle core IP is the game itself (held by Kadokawa Games), from which Kadokawa Publishing's derivative IP comes. Since Kadokawa Pub is a publishing house like DMM, they don't produce their own derivative content. Authors make derivative content, often in the form of doujins, and if Kadokawa Pub likes the content, they can cross-license and publish those themselves. In fact, that's basically how the Maizuru and Chinjufu manga compilations came about. Established and amateur mangaka made what are essentially Kancolle doujin and Kadokawa publishes them. In other words, the doujins are not direct competitors to the core IP. Fan games are different because the core IP is the game we play. However, the LEGAL reason for eliminating fan games is that a lot of fan games steal sound clips and music from the core game which are registered IP of the companies that  produce them. Companies are quite sensitive about that aspect of their IP. The same applies to apps like the Kancolle clock.