In this system, the right to recommend the kokushi of a province was given to a member of the imperial family or a dominant royal, and the dominant royal, who was given the right, appointed his family member or vassal to the kokushi, obtaining a vast amount of income from the province.
これは皇族や大貴族に一国を指定して国司推薦権を与えるもので、大貴族は親族や家来を国司に任命させて当国から莫大な収益を得た。