In February 939, the newly appointed governor of Musashi province, Okiyo-o (genealogy unknown), and MINAMOTO no Tsunemoto (first of the Seiwa Genji) who held the rank of suke, came into conflict with MUSASHI no Takeshiba, who held the rank of gunji (local magistrate), in Adachi-gun County.
天慶2年（939年）2月、武蔵国へ新たに赴任した国司、興世王（出自不明）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。