Koei Tecmo Games Co., Ltd. is a Japanese video game company notable for its "Musou" series of games.
It was established in July 25, 1978 as Koei Co, Ltd.. Eventually, on April 1, 2009, a merger between Koei Co. and Tecmo was established, forming Koei Tecmo Holdings Co., Ltd., a Japanese holding company. It owns several companies, Koei Tecmo Games being one of them. Others include Koei Tecmo Wave, a subsidary that operates game arcades.
Koei Tecmo Games heads several divisions, such as Omega Force, Shibusawa Kou, Team NINJA, Gust, and Ruby Party.