Although after both parties came to an agreement and there was a party held cheerfully for cerebration in Musashi Province, during the party some solders from Takeshiba surrounded Tsunemoto's residence without permission, so Tsunemoto thought he would be killed by Masakado and his solders and rushed to escape to Kyoto, he then reported to the Imperial Palace that Masakado, Prince Okiyo, and Takeshiba plotted treason together.
武蔵国府では双方の和解が成立して和やかに酒宴が行われていたが、その最中に武芝の者達が勝手に経基の営所を包囲した為に、経基は将門らに殺害されるものと思い込んであわてて京へ逃げ帰り、将門・興世王・武芝が謀反を共謀していると朝廷に誣告する。