The Retired Emperorr Go-Toba, who had become a cloistered emperor before he was about to be sentenced to deportation and sent to Oki, died at the place of exile on February 20, 1239, while Emperor Shijo was in power.
隠岐に流される直前に出家して法皇となった後鳥羽上皇は、四条天皇代の延応元年（1239年）2月20日、配所にて崩御。