After Noriaki died, he fought against forces in the Kanto region, such as Ujitsuna UTSUNOMIYA, in cooperation with Noriharu UESUGI who succeeded to the position of Kanto Kanrei, and then took strong control of the Kanto region.
憲顕死後は関東管領を継いだ上杉憲春とともに宇都宮氏綱をはじめとする関東諸勢力と戦い、関東に強力な支配権を形成した。