KōheiKōhei was a Japanese era name after Tengi and before Jiryaku. This period spanned the years from August 1058 through August 1065. The reigning emperor was Emperor Go-Reizei of Japan.Change of era1058 Kōhei 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 Tengi 6, on the 29th day of the 8th month of 1058.Events of the ''Kōhei'' era1060 : A broom star was observed in the south for seven nights.