Emperor Gosaga's children, the brothers of Emperor Gofukakusa, Emperor Kameyama, both fought against each for the position of Chiten no kimi as his father's successor, they came to an agreement to conduct Ryoto Tetsuritsu (sharing the Imperial throne from both Imperial lines) that the direct descendants of the each Imperial line would take turns to sharing the Imperial throne.
後嵯峨の子には、後深草天皇・亀山天皇の兄弟がいたが、互いに後嵯峨後継の治天の君の座を争い、その妥結として、両者の直系子孫が交互に皇位・治天位につく両統迭立が行われることとなった。