Since Tobain (Toba-dono) and its surrounding area was ruled by the Saionji family, who served as chief officers of mikuriya (manors of the retired emperors) and Kanto moshitsugi (court-appointed liaison with the bakufu) for generation, it served as the financial and political basis of the cloister government by Chiten no kimi in the Kamakura period.
鎌倉時代に入ると、鳥羽院は代々院御厨別当・関東申次を務めた西園寺家が周辺の土地とともに知行して治天の君の院政に対して経済的な貢献を行うとともに、その政治力を支える基盤となった。