In February 939, Prince Okiyo and MINAMOTO no Tsunemoto (an ancestor of the Seiwa-Genji), who had been recently appointed as Zuryo (Provincial Governor) and Suke (Assistant Provincial Governor) of Musashi Province respectively, were involved in a conflict with MUSASHI no Takeshiba, the Gunji (Local Magistrate) of Adachi County.
天慶2年（939年）2月、武蔵国へ新たに赴任した受領、興世王と介源経基（清和源氏の祖）が、足立郡の郡司武蔵武芝との紛争に陥った。