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Eikyū (永久) was a Japanese era name (年号, nengō, lit. "year name") after Ten-ei and before Gen'ei. This period spanned the years from July 1113 through April 1118.^[1] The reigning emperor was Emperor Toba-tennō (鳥羽天皇).^[2]

• January 20, 1113 Eikyū gannen (永久元年): The new era name was created to mark an event or series of events. The previous era ended and the new one commenced in Ten'ei 4, on the thirteenth day of the seventh month of 1113.^[3]

• 1113 (Eikyū 1, 4th month): Fujiwara Tadasane was named kampaku.^[4]
• 1113 (Eikyū 1, 4th month): Emperor Toba visited the Matsunoo Shrine and the Kitano Tenman-gū. When the emperor visits Shinto shrines, it is always a pleasure party for him. Without this pretext, court etiquette did not permit him to leave the palace.^[4]
• 1113 (Eikyū 1, 10th month): Toba visited the temples on Mount Hiei in the vicinity of Kyoto.^[4]
• 1113 (Eikyū 1, 11th month ): Toba visited the Inari Shrine and the Gion Shrine.^[4]

• 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