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|History of Japan|
Kōgen (康元?) was a Japanese era name (年号, nengō,?, lit. "year name") after Kenchō and before Shōka. This period spanned the years from October 1256 to March 1257. The reigning emperor was Go-Fukakusa-tennō (後深草天皇?).
Change of era
- 1256 Kōgen gannen (康元元年?): The new era name was created to mark an event or a number of events. The previous era ended and a new one commenced in Kenchō 8.
Events of the Kōgen era
- September 1, 1256 (Kōgen 1, 11th day of the 8th month): Kujō Yoritsune, also known as Fujiwara Yoritsune, died at the age of 39 years.
- October 14, 1256 (Kōgen 1, 24th day of the 9th month): Yoritsune's son and successor as Kamakura shogun, Kujō Yoritsugu, also known as Fujiwara Yoritsugu, died at the age of 18 years.
- Nussbaum, Louis-Frédéric. (2005). "Kōgen" in Japan encyclopedia, p. 542; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File.
- Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 248-253; Varley, H. Paul. (1980). Jinnō Shōtōki. p. 231-232.
- Titsingh, p. 252.
- Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. 10-ISBN 0-674-01753-6; 13-ISBN 978-0-674-01753-5; OCLC 58053128
- Titsingh, Isaac. (1834). Nihon Odai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691
- Varley, H. Paul. (1980). A Chronicle of Gods and Sovereigns: Jinnō Shōtōki of Kitabatake Chikafusa. New York: Columbia University Press. 10-ISBN 0-231-04940-4/13-ISBN 978-0-231-04940-5; OCLC 6042764
- National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection
|Era or nengō
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