Ken'ei
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. The reigning emperor was Tsuchimikado-tennō (土御門天皇?).
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Wikipedia
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. The reigning emperor was Tsuchimikado-tennō (土御門天皇?).