In 1221 the Retired Emperor Gotoba with a plot to overthrow the Bakufu issued an order to defeat Yoshitoki HOJO but failed and was banished to Oki Province (Jokyu War).
承久3年（1221年）後鳥羽上皇が倒幕を企て、北条義時の追討を命じるが、失敗し、上皇は隠岐に配流される（承久の乱）。