Katei (嘉禎) was a Japanese era name (年号, nengō, lit. "year name") after Bunryaku and before Ryakunin. This period spanned the years from September 1235 to November 1238.[1] The reigning emperor was Shijō-tennō (四条天皇).[2]
1235Katei gannen (嘉禎元年): The era name was changed to mark an event or a number of events. The previous era ended and a new one commenced in Bunryaku 2.