As Kamakura kubo, Motouji controlled ten provinces in the Kanto region (later controlling Mutsu Province and Dewa Province as well) along with the Kantokanryo (estate officer of Kanto）as his assistant, but with each generation conflict became more serious with the bakufu in Kyoto.
関東管領を補佐役として関東十ヶ国を支配した（後に陸奥国・出羽国も管轄した）が、代を重ねるに従って京都の幕府と対立するようになった。