It was hard to prove that the Fujiwara clan of Takata County, Aki Province, Taira clan of Yunogo, Tanba Province, Hasetsukabe clan of Nabari County, Iga Province, and Chiba clan of Soma-mikuriya (private estate of Soma ranch), Shimosa Province that developed as the kaihatsu-ryoshu between eleventh-twelfth century, and other examples proven by many historical manuscripts, had master and servant relationships with the military aristocrats called 'toryo of bushi' at that time.
11-12世紀の間に、開発領主として発展していったことが豊富な資料で裏付けられる安芸国高田郡の藤原氏、但馬国温泉郷（ゆのごう）の平氏、伊賀国名張郡の丈部（はせつかべ）氏、下総国相馬御厨の千葉氏、その他の例をみても、彼らが当時の「武士の棟梁」と言われた軍事貴族と人格的な主従関係をもっていたと証明することは非常に困難とされる。