Oryoshi was a government post which had authority over the military and police affairs in the whole area of the two provinces and took command of a Bushidan (warrior bands) of 170,000 mounted warriors consisting mainly of Gunji (district official)-level warriors in various counties.
両国の一円に及ぶ軍事・警察の権限を司る官職であり、諸郡の郡司クラスを主体とする武士団十七万騎を統率するものであった。