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Eiji (永治) was a Japanese era name (年号, nengō, lit. "year name") after Hōen and before Kōji. This period spanned the year from July 1141 through April 1142.^[1] The reigning emperors were Sutoku-tennō (崇徳天皇) and Konoe-tennō (近衛天皇).^[2]

• February 9, 1141 Eiji gannen (永治元年): The old era name was created to mark an event or series of events. The previous era ended and the old one commenced in Hōen 6, on the 10th day of the 7th month of 1141.^[3]

• 1141 (Eiji 1, 3rd month): The former Emperor Toba accepted the tonsure and became a Buddhist monk at the age of 27 years.^[4]
• January 5, 1142 (Eiji 1, 7th day of the 12th month): In the 18th year of Sutoku-tennō's reign (崇徳天皇18年), the emperor abdicated; and the succession (senso) was received by a younger brother, the 8th son of former Emperor Toba. Shortly thereafter, Emperor Konoe is said to have acceded to the Chrysanthemum Throne (sokui).^[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