Ten'en
Ten'en was a Japanese era name after Tenroku and before Jōgen. This period spanned the years from December 973 through July 976. The reigning emperor was Emperor En'yū.
Change of era
- February 6, 973 Ten'en gannen: 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 Tenroku 4, on the 20th day of the 12th month of 973.
Events of the ''Ten'en'' era
- May 28, 973 : A fire broke out in a Minamoto compound located near the Imperial Palace. The fire could not be contained; and more than 300 houses were reduced to cinders. The guard was doubled around the Emperor's residence.
- 974 : Fujiwara no Kanemichi was named Daijō-daijin; and he was given permission to travel to court in a carriage.
- 974 : The emperor received a gift of horses from Korea.
- 975 : A comet was seen in the night sky.