Michinori moved forward to weaken the power of Sekkan-ke (families of regents and advisers) and to promoted the direct rule by the emperor; he exerted power to establish Shinsei Nana Kajo (newly established seven rules) and restore Kirokushoenkenkeisho (Research office of manor) to a reorganized manor.
また、摂関家の弱体化と天皇親政を進め、新制七カ条を定め、記録荘園券契所を再興して荘園の整理を行うなど、絶大な権力を振るう。