was a after Ken'ei and before Kenryaku. This period spanned the years from October 1207 through March 1211.Nussbaum, Louis-Frédéric. (2005). "Jōgen" in Japan encyclopedia, p. 429; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see . The reigning emperors were and .Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 221-231; Brown, Delmer et al. (1979). Gukanshō, p. 340; Varley, H. Paul. (1980). Jinnō Shōtōki, pp. 220-221.
Change of era 1207 ; 1207: 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 Ken'ei 2, on the 25th day of the 10th month of 1207.Brown, p. 340.
Events of the Jōgen era 1208 (Jōgen 2, 6th month): The emperor went to the Kumano Sanzan Shrine.Titsingh, p. 229. 1210 (Jōgen 4, 5th month): The emperor returned to the Kumano Shrine.Titsingh, p. 230. 1210 (Jōgen 4, 6th month): The emperor accepted Hideyasu, prince of Kazusa, as part of the court. 1210 (Jōgen 4, 8th month): The emperor visited the Kasuga Shrine. 1210 (Jōgen 4, 9th month): A comet with a very long tail appeared in the night sky. 1210 (Jōgen 4, 25th day of the 11th month): In the 12th year of Tsuchimikado-tennōs reign (土御門天皇12年), the emperor abdicated for no particular reason; and the succession (senso) was received by his younger brother, the second son of the former-Emperor Go-Toba. Shortly thereafter, Emperor Juntoku is said to have acceded to the throne (sokui).Titsingh, p. 230; Brown, p. 341; Varley, p. 44; a distinct act of senso is unrecognized prior to Emperor Tenji; and all sovereigns except Jitō, Yōzei, Go-Toba, and Fushimi have senso and sokui in the same year until the reign of Emperor Go-Murakami.
Notes
References 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. ; OCLC 5145872 Kitagawa, Hiroshi and Bruce T. Tsuchida, eds. (1975). The Tale of the Heike. Tokyo: University of Tokyo Press. ; ; ; ; OCLC 193064639 Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ; 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. ; OCLC 6042764
External links National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection