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Ken'ei (建永) was aJapanese era name (年号,nengō; lit. "year name") afterGenkyū and beforeJōgen. This period spanned the years from April 1206 through October 1207.^[1] The reigning emperor wasTsuchimikado-tennō (土御門天皇).^[2]

• 1206Ken'ei gannen (建永元年): The new era name was created to mark an event or a number of events. The previous era ended and a new one commenced inGenkyū 3, on the 27th day of the 4th month of 1206.^[3]

• 1206 (Ken'ei 1, 2nd month):ShōgunMinamoto no Sanetomo's standing at court was raised to the 2nd rank of the 4th class.^[4]
• 1206 (Ken'ei 1, 7th day of the 3rd month): The emperor planned to pay a visit to thesesshōKujō Yoshitsune, but in the night before this visit, an unknown assassin was introduced secretly into Yoshitune's house, and he was stabbed by a spear pushed up from below the floor. No one was able to discover the perpetrator. Yoshitsune was then aged 38 years. ThesadaijinKonoe Iezane succeeded Yoshitsune assesshō; and thedainagon Fujiwara no Tadatsune becamesadaijin.^[5]
• 1206 (Ken'ei 1, 12th month):Konoe Iezane ceases to function assesshō (regent); and instead, he becomeskampaku (chancellor).^[6]

• Brown, Delmer and Ichiro Ishida. (1979).The Future and the Past: a translation and study of the 'Gukanshō', an interpretative history of Japan written in 1219. Berkeley:University of California Press.ISBN 978-0-520-03460-0;OCLC 5145872
• Kitagawa, Hiroshi and Bruce T. Tsuchida, eds. (1975).The Tale of the Heike. Tokyo:University of Tokyo Press.ISBN 9784130870245;ISBN 9784130870238;ISBN 9780860081883;ISBN 9780860081890;OCLC 193064639
• 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

• Japanese eras
• 1206 in Asia
• 1207 in Asia
• 1200s in Japan
• 13th-century neologisms

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• Articles containing Japanese-language text