The Fushu who had been forced to emigrate to the Japanese territory were issued with food as a Fushu allowance by kokushi and given remission from payment of Yo (tax in kind) and Cho (another type of tax) until they could earn a living by themselves.
俘囚は、定住先で生計が立てられるようになるまで、俘囚料という名目で国司から食糧を支給され、庸・調の税が免除された。