While Kanto Gobunkoku played a great role in securing the rule of the Kamakura bakufu during it's time, it's importance was reduced once the shogunate order was established and stabilized, and the number of provinces gradually decreased.
幕府成立当初は東国支配確立のため制度的保障としての意義があったが、幕府体制の安定に伴い役割が低下したためと見られる。