In addition, he was given authority to lead the bushidan (warrior bands) in the eastern countries as 'betto (administrator) of samurai in the Bando eight countries,' according to "Heike Monogatari" (The Tale of the Heike).
その際に、「坂東八カ国の侍の別当」（『平家物語』）として東国の武士団を統率する権限も与えられたらしい。