Yoshishige who was appointed to a shokan (an officer governing shoen [manor]) called himself the Nitta clan, and established a ruling system by deploying his sons centered in Nitta no sho estate and Yawata no sho estate.
荘官に任ぜられた義重は新田氏を称し、新田荘と八幡荘を中心に息子たちを配して、支配体制を確立する。