Ken'ei (建永) was a Japanese era name (年号, nengō, lit. "year name") after Genkyū and before Jōgen. This period spanned the years from April 1206 through October 1207.[1] The reigning emperor was Tsuchimikado-tennō (土御門天皇).[2]
^Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 221-229; Brown, Delmer et al. (1979). Gukanshō, p. 340; Varley, H. Paul. (1980). Jinnō Shōtōki, pp. 220-221.