An'ei (安永) was a Japanese era after Meiwa and before Tenmei and spanned from 1772 to 1782. The reigning emperors were Go-Momozono and Kōkaku.

Change of Era

Due to the enthronement of Emperor Go-Momozono and continuing damages from fires and storms, on Meiwa 9, known as the Trouble Year, the era became the An'ei (Peaceful eternity).

An'ei	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th
Gregorian	1772	1773	1774	1775	1776	1777	1778	1779	1780	1781	1782