- Kōgen
. [Titsingh, Isaac. (1834). "Annales des empereurs du Japon," pp. 248-255; Varley, H. Paul. (1980). "Jinnō Shōtōki." p. 231-232.]
Change of era
*;
1256 : 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
* "Kōgen 1" (
1256 ):References
* Titsingh, Isaac, ed. (1834). [Siyun-sai Rin-siyo/
Hayashi Gahō , 1652] , "Nipon o daï itsi ran ; ou, Annales des empereurs du Japon, tr. par M. Isaac Titsingh avec l'aide de plusieurs interprètes attachés au comptoir hollandais de Nangasaki; ouvrage re., complété et cor. sur l'original japonais-chinois, accompagné de notes et précédé d'un Aperçu d'histoire mythologique du Japon, par M. J. Klaproth." Paris: Oriental Translation Fund of Great Britain and Ireland. [http://books.google.com/books?id=18oNAAAAIAAJ&dq=nipon+o+dai+itsi+ran ...Click link for digitized full text copy of this book (in French)]
* Varley, H. Paul , ed. (1980). [Kitabatake Chikafusa , 1359] , "Jinnō Shōtōki ("A Chronicle of Gods and Sovereigns: Jinnō Shōtōki of Kitabatake Chikafusa" translated by H. Paul Varley)." New York:Columbia University Press . ISBN 0-231-04940-4External links
* National Diet Library, "The Japanese Calendar" [http://www.ndl.go.jp/koyomi/e/ -- historical overview plus illustrative images from library's collection]
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