Koei Co., Ltd. is a Japanese video game company that has been a significant player in the gaming industry since its founding in 1978. The company is known for its focus on historical and strategy games, particularly in the simulation and tactical genres.
Koei has been responsible for creating several well-known game series and has had a lasting impact on the gaming landscape. Some of Koei's most notable series include: Romance of the Three Kingdoms, Nobunaga's Ambition, Dynasty Warriors, Samurai Warriors.
In 2009, Koei merged with another Japanese video game company, Tecmo, to form Koei Tecmo Holdings Co., Ltd. This merger allowed the companies to combine their strengths and resources, leading to the continued development of their respective franchises as well as new collaborations.