Kempo (era)
Kempo (建保?) was a Japanese era name (年号, nengō, lit. year name) after Kenryaku and before Jōkyū. This period spanned the years from December 1213 through April 1219. The reigning emperor was Juntoku-tennō (順徳天皇).
Read more about Kempo (era): Change of Era, Events of The Kempo Era