In 1185, the number of Kanto Gobunkoku reached the highest at 9, although the number of Kanto Gobunkoku decreased to 4 during the reign of MINAMOTO no Sanetomo, the third and last shogun of the Kamakura bakufu.
文治元年（1185年）には9ヵ国に達したが、源実朝の時代には4ヵ国に減少する。