Meanwhile, Ujimasa forced Sekiyado-jo Castle of Shimousa Province ruled by Harusuke YANADA to surrender in December 1574, followed by another surrender of Gion-jo Castle of Shimotsuke Province ruled by Hidetsuna OYAMA in the following year.
この隙に、同年閏11月には簗田晴助の下総国関宿城を攻め落とし、翌年には小山秀綱の下野国祇園城を攻め落とした。