The Kamakura bakufu let Emperor Chukyo abdicate the throne and decided to institute a new policy 'Not to allow Retired Emperor Gotoba's descendants succeed to the throne,' and they tried to set up an Imperial Family member to succeed, who was not a member of Emperor Gotoba's Imperial Family.
鎌倉幕府は仲恭天皇を廃位し、「後鳥羽上皇の子孫の皇位継承は認めない」とする方針を決定、非後鳥羽系皇族の擁立を図った。