Kenchō
Kenchō (建長?) was a Japanese era name (年号, nengō,?, lit. "year name") after Hōji and before Kōgen. This period spanned the years from March 1249 to October 1256. The reigning emperor was Go-Fukakusa-tennō (後深草天皇?).
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Wikipedia
Kenchō (建長?) was a Japanese era name (年号, nengō,?, lit. "year name") after Hōji and before Kōgen. This period spanned the years from March 1249 to October 1256. The reigning emperor was Go-Fukakusa-tennō (後深草天皇?).