According to Japanese news site Sankei, Capcom is suing fellow publisher Koei Tecmo for multiple cases of patent infringement.
The exact contents of the patents are yet unknown, but alleged infringements include a number of functions found within key games, including the ability to import or content from an old title to a new one, disc-based expansions, and controller vibrations to warn when enemies are nearby.
Samurai Warriors: Xtreme Legends and 49 other games have been cited in the lawsuit. Along with roughly $9.43 million USD in damages, Capcom is also calling for many of the sales of these games to be suspended.
According to Capcom, the games in question containing said patent infringements have "greatly contributed to the sales" of Koei Tecmo, and wants to claim 5-10 percent in license fees.
