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|History of Japan|
- For the Okinawan king, see Eiso (Ryukyu).
Eiso (永祚?) was a Japanese era name (年号, nengō,?, lit. "year name") after Eien and before Shōryaku. This period spanned the years from August 988 through November 990. The reigning emperor was Ichijō-tennō (一条天皇?).
Change of era
- 989 Eiso gannen (永祚元年?): 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 Eien 2, on the 8th day of the 8th month of 989.
Events of Eiso era
- 989 (Eiso 1, 1st month): Emperor Ichijō made a personal visit to the home of his father, the retired Emperor En'yū, who is now known as Kongō Hō.
- 989 (Eiso 1, 5th month): Fujiwara no Kaneie fell ill, and his son, Fujiwara no Michitaka, was chosen as regent (Kampaku) in his place. Kaneie retired from public life. He shaved his head and became a Buddhist monk.
- July 26, 989 (Eiso 2, 2nd day of the 7th month): Fujiwara no Kaneie died at age 62, and his home was converted into a Buddhist temple.
- Nussbaum, Louis-Frédéric. (2005). "Eiso" in Japan Encyclopedia, p. 172, p. 172, at Google Books; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File.
- Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 150-151; Brown, Delmer et al. (1979). Gukanshō, p. 302-307; Varely, H. Paul. (1980). Jinnō Shōtōki, pp. 192-195.
- Brown, p. 305.
- Titsingh, p. 151.
- Brown, Delmer M. and Ichirō Ishida, eds. (1979). Gukanshō: The Future and the Past. Berkeley: University of California Press. 10-ISBN 0-520-03460-0; 13-ISBN 978-0-520-03460-0; OCLC 251325323
- Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. 10-ISBN 0-674-01753-6; 13-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. 10-ISBN 0231049404/13-ISBN 9780231049405; OCLC 6042764
- National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection
|Era or nengō