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Shōryaku (正暦) was a Japanese era name (年号, nengō, lit. "year name") after Eiso and before Chōtoku. This period spanned the years from November 990 through February 995.^[1] The reigning emperor was Ichijō-tennō (一条天皇).^[2]

• 990 Shōryaku gannen (正暦元年): 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 Eiso 3, on the 7th day of the 11th month of 990.^[3]

• March 1, 991 (Shōryaku 2, on the 12th day of the 2nd month): The former-Emperor En'yū died at the age of 33.^[4]
• 992 (Shōryaku 3): Nara Governor Kujō Kanetoshi constructed a new temple complex named Shoryaku-ji in response to an Imperial edict.^[5]

• 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 Odai 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