was a Japanese era name (年号, nengō, lit. year name) of the Northern Court during the Era of Northern and Southern Courts after Ryakuō and before Jōwa. This period spanned the years from April 1342 to October 1345. The emperor in Kyoto was . Go-Kōgon's Southern Court rival in Yoshino during this time-frame was .

Koei Co., Ltd. is a Japanese video game publisher, developer, and distributor founded in 1978. The company is known for its historical simulation games based on the novel Romance of the Three Kingdoms, as well as simulation games based on pseudo-historical events.