Tsunetoshi YAMANOUCHI SUDO did not recognize this attack as a rebellion of the Taira clan and Samurai-dokoro betto (the superior of the board of retainers), Yoshimori WADA, reported to the bakufu that the incident was caused by Yukitsuna SHINSHI, gunji (official of a county) of Inabe County, Ise Province, who was captured and sent to prison in March 1204.
山内首藤経俊はこの襲撃事件を平氏反乱の兆しとは気づかず、12月25日に侍所別当和田義盛が幕府に事件の張本を伊勢国員弁郡の郡司進士行綱と報告し、翌元久元年（1204年）2月、行綱は召し捕られ囚人とされた。