was a after Gennin and before Antei. This period spanned the years from April 1225 to December 1227.Nussbaum, Louis-Frédéric. (2005). "Karoku" in Japan encyclopedia, p. 483; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File . The reigning emperor was .Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 238-240; Varley, H. Paul. (1980). Jinnō Shōtōki. pp. 226-227.
Change of era 1225 : The era name was changed to mark an event or a number of events. The previous era ended and a new one commenced in Gennin 2.
Events of the Karoku Era 1225 (Karoku 1, 11th month): At Kamakura, Kujō Yoritsune's coming of age ceremonies took place at age 8; but control of all bakufu affairs remained entirely in the hands of Hōjō Yasutoki, the regent (shikken).Titsingh, p. 240. 1225 (Karoku 1, 12th month): Emperor Go-Horikawa went in formal procession to Iwashimizu Hachiman-gū and to the Kamo Shrines. 1226 (Karoku 2, 1st month): The Emperor raised Yoritsune to the first rank of the fifth class in the apex of artistocratic court hierarchy (the dōjō kuge).
Notes
References 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