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Kanpō ( was a 寛保) Japanese era name (, also known as 年号, , lit. "year name") nengō, Kampō, after and before Genbun This period spanned the years from February 1741 through February 1744. Enkyō. The reigning emperor was  Sakuramachi -tennō (. 桜町天皇)
Change of era
1741 Kanpō gannen (: Based on the belief in 寛保元年) Chinese astrology that the 58th year of the sexagenary cycle brings changes, the era name was changed to Kanpō (meaning "Keeping Lenient and Generous"). The previous era ended and the new one commenced in Genbun 6, on the 27th day of the 2nd month.
Events of the Kanpō era
1742 ( Kanpō 2): A comet was seen in the sky. 
1742 ( Kanpō 2, 8th month): Persistent heavy rains create floods throughout the country, with noteworthy devastation in Musashi province, Kōzuke province, Shimotsuke province, and Shinano province. In Heian-kyō, the Sanjo Bridge is washed away in this destructive storm cycle.  1743 ( Kanpō 3, 11th month): A comet was sighted in the night sky; and this comet is likely to have been what is today identified as  C/1743 X1 (De-Cheseaux). 
^ Nussbaum, Louis-Frédéric. (2005). "
Kampō" Japan Encyclopedia,, p. 465, at p. 465 Google Books; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File Archived 2012-05-24 at Archive.today.
^ Titsingh, Isaac. (1834).
Annales des empereurs du japon, pp. 417-418.
^ a b Titsingh, p. 418.
^ Ponsonby-Fane, Richard. (1956).
Kyoto: the Old Capital, 794-1869, p. 321; Titsingh, p. 418.
^ Zhuang, T. (1988).
Acta Astronomica Sinica, v29:2, p. 208.
Nussbaum, Louis Frédéric and Käthe Roth. (2005).
Japan Encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 48943301
Ponsonby-Fane, Richard Arthur Brabazon. (1956). Kyoto: The Old Capital of Japan, 794-1869. Kyoto: Ponsonby Memorial Society. OCLC 182637732
Screech, Timon. (2006). London: Secret Memoirs of the Shoguns: Isaac Titsingh and Japan, 1779-1822. RoutledgeCurzon. ISBN 978-0-203-09985-8; OCLC 65177072
Titsingh, Isaac. (1834). ; ou, Nihon Odai Ichiran Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691. Zhuang, T. S. (1988). Acta Astronomica Sinica, v29:2, p. 208, "Comet De-Cheseaux as Observed in China in 1743-44".