During the early Kamakura Period, the authority of shugonin bugyo (subsequently shugo) or jito over kokugaryo (state-owned land) and shoen (manor) was not so conspicuous, but after the mid Kamakura Period, as the tax revenue efficiency of the state-owned land and shoen or properties themselves began to be rapidly eaten away by these people, the Imperial Court and court nobles, who were the protection basis of onmyoji, started to experience financial difficulties.
鎌倉時代初期においては、国衙領や荘園に守護人奉行（のちの守護）や地頭の影響力はそれほど及んでいなかったが、鎌倉中期以降、国衙領・荘園の税収入効率ないし領地そのものがこれらに急激に侵食されはじめると、陰陽師の保護基盤である朝廷・公家勢力は経済的にも苦境を迎えるようになっていった。