Jōgen (貞元) was a Japanese era (年号, nengō,, lit. "year name") after Ten'en and before Tengen. This period spanned the years from July 976 through November 978. The reigning emperor was En'yu-tennō (円融天皇).
Change of era 
- February 3, 976 Jōgen gannen (貞元元年): 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 Ten'en 4, on the 13th day of the 7th month of 976.
Events of the Jōgen era 
- June 11, 976 (Jōgen 1, 11th day of the 5th month): The Imperial Palace was destroyed by a great fire.
- December 20, 977 ('Jōgen 2, 8th day of the 11th month): Fujiwara no Kanemichi dies at the age of 51.
- ^ Nussbaum, Louis-Frédéric. (2005). "Jōgen" in Japan Encyclopedia, p. 429 at Google Books; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File.
- ^ Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 144-146; Brown, Delmer et al. (1979). Gukanshō, p. 299-300; Varely, H. Paul. (1980). Jinnō Shōtōki, pp. 191-192.
- ^ Brown, p. 300.
- ^ Titsingh, p. 145.
- ^ Titsingh, p. 146.
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