Anna (安和) was a Japanese era (年号,, nengō,; lit. "year name") after Kōhō and before Tenroku. This period spanned the years from August 968 through March 970. The reigning emperors were Reizei-tennō (冷泉天皇) and En'yū-tennō (円融天皇).
26 October 968 (Anna 1, 26th day of the 10th month): A child who would become Emperor Kazan is born in the house of the man who would become Emperor Ichijo.
♯The Northern pretenders did not recognize the Genkō era. Gentoku was used in the Northern Court until 1332. ₪The Shōkyō era was recognized only by the Northern pretenders, not by the Southern Court. ‡ Upon reunification of the Northern and Southern Courts in 1392, Genchū was discontinued. Meitoku was used until 1394.