Ten'yō (天養) was a Japanese era name (年号,,nengō,, lit. "year name") after Kōji and before Kyūan. This period spanned the year from February 1144 through July 1145. The reigning emperor was Konoe-tennō (近衛天皇).
February 6, 1144Ten'yō gannen (天養元年): The new era name was created to mark an event or series of events. The previous era ended and a new one commenced on March 27, 1144 (Kōji 3, on the 22nd day of the 2nd month).
Events of the Ten'yō Era
1144 (Ten'yō 1, 7th month): A new era name was created because a comet was sighted in the sky in the 7th month of Ten'yō gannen.
1145 (Ten'yō 1, 8th month): The empress Taiken-mon In, mother of former-Emperor Sutoku died.