The wife and children of Tamemasa INUKAI, Kazusa no suke (Assistant Governor of Kazusa Province), escaped to Kyoto and the kokujins (provincial warriors) in Kazusa Province who saw this cooperated with Tadatsune and the rebellion extended to the three Boso provinces (Kazusa, Shimousa and Awa).
上総介縣犬養為政の妻子が京へ逃れ、これを見た上総国の国人たちは忠常に加担して反乱は房総三カ国（上総国、下総国、安房国）に広まった。