In addition, the Seii Taishogun (literally, "a great general who subdues the barbarians") Yoshimasa ASHIKAGA banished the Kamakura kubo (Governor-general of the Kanto region) Shigeuji ASHIKAGA from Kamakura because Shigeuji's behavior, including the premeditated murder of Noritada UESUGI, was too violent and rude to be overlooked, but since the shogun was not powerful enough to defeat him, Noritane attempted to increase his influence by supporting Shigeuji ASHIKAGA's side, which lineage has also been called the Chiba clan from that time onwards.
また、征夷大将軍足利義政は、上杉憲忠を謀殺するなど粗暴な振る舞いの目立つ鎌倉公方足利成氏に対し、鎌倉からは追放はしたものの討伐するだけの力が無かったので、孝胤は足利成氏側に付き勢力拡大を図り、その後この系統も千葉氏と呼ばれている。