An'ei (安永 ?) was a Japanese era name (年号 nengō ?, "year name") after Meiwa and before Tenmei. This period spanned the years November 1772 through March 1781. [1] The reigning emperors were Go-Momozono-tennō (後桃園天皇 ?) and Kōkaku-tennō (光格天皇 ?).

Change of era

  • 1772 An'ei gannen (安永元年 ?): The era name was changed to An'ei (meaning "peaceful eternity") to mark the enthronement of Emperor Go-Momozono and in hopes of turning attention from the serial catastrophic devastation from fires and storms in Meiwa 9. The previous era ended and a new one commenced in the 11th month of Meiwa 9.