Jian (治安) was a Japanese era name (年号, nengō, lit. "year name"), also known as Chi'an, after Kannin and before Manju. This period spanned the years from February 1021[1] through July 1024.[2] The reigning emperor was Go-Ichijō-tennō (後一条天皇).[3]
Change of Era
1021Jian gannen (治安元年): The era name was changed to mark an event or series of events. The previous era ended and a new one commenced in Kannin 5, on the 2nd day of the 2nd month of 1021.[4]
Events of the Jian era
1023 (Jian 3, 4th month): An epidemic in Kyoto was so severe that there were corpses in the streets;[5] disease spread throughout the country.[6]
^Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 156-159; Brown, Delmer et al. (1979). Gukanshō, pp. 307-310; Varley, H. Paul. (1980). Jinnō Shōtōki. p. 195-196.