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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]

Change of era

• 1235 Katei 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.

Events of the Katei Era

• 1235 (Katei 1, 11th month): Kujō Yoritsune is raised to the second rank of the second class in the court hierarchy (the dōjō kuge).^[3]
• 1236 (Katei 2, 7th month): Yoritsune is raised to the first rank of the second class in the dōjō kuge.^[3]
• 1237 (Katei 3, 8th month): Yoritsune ordered the building of a mansion in the Rokuhara section of Kyoto.^[3]