Kōji (康治) was a Japanese era name (年号, nengō, lit. "year name") after Eiji and before Ten'yō. This period spanned the year from April 1142 through February 1144.[1] The reigning emperor was Konoe-tennō (近衛天皇).[2]
Change of Era
January 29, 1142Kōji gannen (康治元年): The new era name was created to mark an event or series of events. The previous era ended and a new one commenced in Eiji 2, on the 28th day of the 4th month of 1142.[3]
^Titsingh, Isaac. (1834). Annales des emepereurs du japon, pp. 186-188; Brown, Delmer et al. (1979). Gukanshō, pp. 324-326; Varley, H. Paul. (1980). Jinnō Shōtōki, p. 205.