As Oyumi-jo Castle was retaken by the Chiba clan under the support of the Hojo clan after Yoshiaki's death, the surviving members of his family fled to Awa Province asking for the help of the Satomi clan.
義明の戦死後、小弓城は北条氏の支援を受けた千葉氏が奪還したために義明の遺族は里見氏を頼って安房国に逃れた。