He served as a conservator of his young great-grandchild Masayoshi NITTA (for an untimely death of his garndchild Yoshifusa NITTA) who just inherited the headship of the Nitta family with his heir Yoshikane in his later years.
晩年は、嫡男の義兼とともに新田家の家督を継いだばかりの幼い曾孫の新田政義（孫の新田義房が早世したため）の後見役を務めた。