Koei Co., Ltd. (æ ªå¼ä¼šç¤¾ã‚³ãƒ¼ã‚¨ãƒ¼ Kabushiki gaisha KÅÄ“, formerly å…‰æ „ (KÅei)) is a Japanese video game publisher, developer, and distributor founded in 1978. The company is best known for its historical simulation games based on the novel Romance of the Three Kingdoms, as well as simulation games based on historical events.