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Kangen (寛元) was a Japanese era name (年号, nengō, lit. "year name") after Ninji and before Hoji. This period spanned the years from February 1243 to February 1247.^[1] The reigning emperor was Go-Saga-tennō (後嵯峨天皇).^[2]

Change of era

• Kangen gannen (寛元元年); 1243: 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 Ninji 4.

Events of the Kangen era

• 1244 (Kangen 2): In the spring of this year, a number of extraordinary phenomena in the skies over Kamakura troubled Yoritsune deeply.^[3]
• 1244 (Kangen 2, 4th month): Yoritsune's son, Yoritsugu, had his coming-of-age ceremonies at age six. In the same month, Yoritsune asked Emperor Go-Saga for permission to give up his responsibilities as shōgun in favor of his son, Kujō Yoritsugu.^[3]
• September 11, 1245 (Kangen 3, 7th month): Yoshitsune shaved his head and became a Buddhist priest.^[3]
• 1246 (Kangen 4, 7th month): Yoritsune's son, now Shōgun Yoritsugu (who is only 7 years old) marries the sister of Hōjō Tsunetoki (who is himself only 16 years old).^[3]
• 1246 (Kangen 4): In the 4th year of Go-Saga-tennō's reign (後嵯峨天皇4年), he abdicated; and despite the succession (senso) was received by his 4-year-old son. Shortly thereafter, Emperor Go-Fukakusa is said to have acceded to the throne (sokui).^[4]