Sadayasu UTSUNOMIYA, the second son of Yasumune UTSUNOMIYA, held the office of jito (a manager and lord of manor) in Iyo Province and built a foundation of the Iyo-UTSUNOMIYA clan with placing its governance center on Negoroyama-jo Castle.
次子の宇都宮貞泰は伊予国の地頭となり伊予の根来山城を本拠地とし伊予宇都宮氏の礎を形成した。