Ōhō (応保) was a Japanese era name (年号,,nengō,, lit. "year name") after Eiryaku and before Chōkan. This period spanned the years from September 1161 through March 1163. The reigning emperor was Nijō-tennō (二条天皇).
January 28, 1161Ōhō gannen (長寛元年): 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 Eiryaku 2, on the 4th day of the 9th month of 1161.
Events of the Ōhō era
1161 (Ōhō 1, 2nd month): The emperor visited Kasuga Shrine and other shrines which were situated just outside the boundaries of the capital city.