Gotoba-in tried to seize the opportunity of the assassination of Shogun MINAMOTO no Sanetomo, seeking to revive the imperial power and overthrow Kamakura Bakufu, but he failed (the Jokyu Rebellion); instead he was banished, and this brought about the weakening of imperial power and intervention in the Imperial Court by the regent Hojo clan.
後鳥羽院は、将軍源実朝が暗殺された事を好機とし、皇権復興を企図して鎌倉幕府を倒そうとしたが失敗（承久の乱）、自身は流罪となった上、皇権の低下と朝廷へ執権北条氏の介入を招いてしまった。