Emperor Juntoku
Juntoku (1197–1242), a son of Emperor Go-Toba, became crown prince in 1200 and succeeded his brother Tsuchimikado in 1210 when Go-Toba forced the abdication. Real power stayed with Go-Toba as cloistered emperor. In 1221 he abdicated for his infant son Chūkyō and backed Go-Toba's rising against the Kamakura shogunate, the Jōkyū War.
The court's forces were crushed within weeks; Juntoku was exiled to Sado Island and lived there twenty-one years, dying in 1242. A pupil of Fujiwara no Teika, he left a poem in the Ogura Hyakunin Isshu.