On April, 1184, Koreyoshi, Yoshinobu's son, was assigned to the Shugo (provincial constable) of the Iga Province and Yoshinobu himself was assigned to Musashi no kuni no kami (governor of Musashi Province) by Yoritomo's recommendation on July in the same year.
元暦元年（1184年）3月には子惟義が伊賀国の守護に任じられ、義信自身も同年6月に頼朝の推挙により武蔵国守に任官し守護も兼ねた。