Ten'en (天延) was a Japanese era (年号,, nengō,; lit. "year name") after Tenroku and before Jōgen. This period started in December 973 and ended in July 976. The reigning emperor were En'yu-tennō (円融天皇).
Events of the Ten'en era
28 May 973 (Ten'en 1, 24th day of the 4th month): A fire broke out in a Minamoto compound located near the Imperial Palace. The fire destroyed more than 300 houses. The guard was doubled around the Emperor's residence.
♯The Northern pretenders did not recognize the Genkō era. Gentoku was used in the Northern Court until 1332. ₪The Shōkyō era was recognized only by the Northern pretenders, not by the Southern Court. ‡ Upon reunification of the Northern and Southern Courts in 1392, Genchū was discontinued. Meitoku was used until 1394.