During the period of Nagamasa, his master's family the Hatakeyama clan was divided into the Soshu and Bishu families in opposition to each other; at first, Nagamasa served Yoshitaka HATAKEYAMA of the Hatakeyama Soshu family, which had Yoshinari HATAKEYAMA as its ancestor.
長政の時代において、主家の畠山氏は総州家と尾州家に分かれて対立しており、当初は畠山義就を祖とする畠山総州家の畠山義堯に仕えていた。