Tentoku was a Japanese [era name] after Tenryaku and before Ōwa. This period spanned the years from October 957 through February 961. The reigning emperors was Emperor Murakami.
Change of era
February 3, 957Tentoku gannen: The new era name was created to mark an event or series of events. The previous era ended and the new one commenced in Tenryaku11, on the 27th day of the 10th month.