As soon as he was sent to there, he conducted kenchu (land survey) together with Prince Okiyo, who was also sent to Musashi Province as Governor, MUSASHI no Takeshiba, who was Gozoku (local ruling family) in the local area as well as Adachi gunji and local governer for judicial decision, refused the survey since he insisted it was custom not to do the survey before the official appointment of senior provincial governer, after this incident, Tsunemoto and others raised an army and attacked Takeshiba's gunke (public office) and plundered everything from there.
同じく赴任した武蔵国司興世王と共に赴任早々に検注を実施すると、在地の豪族である足立郡司で判代官の武蔵武芝が正任国司の赴任以前には検注が行われない慣例になっていたことから検注を拒否した為、経基らは兵を繰り出して武芝の郡家を襲い、略奪を行った。