Thereafter, the Kanmu-Heishi, which was descended from the fiftieth Emperor Kanmu, took over Togoku (Hitachi Province, Kazusa Province and Kozuke Province) by appointing imperial princes to the governors of the provinces.
その後、第50代桓武天皇から派生した桓武平氏は東国を親王任国として自領化していった（常陸国・上総国・上野国）。