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Anna (安和) was a Japanese era (年号, nengō, "year name") after Kōhō and before Tenroku. This period spanned the years from August 968 through March 970.^[1] The reigning emperors were Reizei-tennō (冷泉天皇) and En'yū-tennō (円融天皇).^[2]

• February 2, 968 Anna gannen (安和元年): The new era name was created to mark an event or series of events. The previous era ended and the new one commenced in Kōhō 4, on the 15th day of the 8th month of 968.^[3]

• October 26, 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 Ichijō.^[4]
• September 27, 969 (Anna 2, 13th day of the 8th month): Fujiwara no Saneyori (藤原実頼) was appointed sesshō (regent).
• 969 (Anna 2, 10th month): The sadaijin Fujiwara no Morotada (藤原師尹) died.^[5]
• 969 (Anna 2, 12th month): The sesshō Saneyori celebrated his 70th birthday.^[5]
• 969 (Anna 2): The "Anna Incident" (Anna no hen)^[6]

• Brown, Delmer M. and Ichirō Ishida, eds. (1979). Gukanshō: The Future and the Past. Berkeley: University of California Press. ISBN 978-0-520-03460-0; OCLC 251325323
• Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 58053128
• Titsingh, Isaac. (1834). Nihon Ōdai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691
• Varley, H. Paul. (1980). A Chronicle of Gods and Sovereigns: Jinnō Shōtōki of Kitabatake Chikafusa. New York: Columbia University Press. ISBN 9780231049405; OCLC 6042764

• National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection