It is thought that the Fushu who stayed in the Mutsu and Dewa provinces were given remission from payment of So (a type of tax), unlike people of the same region who took the side of the Imperial Court.
陸奥国・出羽国にとどまった俘囚は、同じ地域の朝廷派の人々と異なり、租税を免除されていたと考えられている。