As the position of Imperial Prince Taishu was yonin (remote appointment) and Imperial Princes were not required to go to the respective provinces, suke, the deputies of Imperial Prince Taishu, were practically the highest position in Shinno-ningoku.
親王太守は、現地へ赴任しない遙任だったため、親王任国での実務上の最高位は、次官の国介（すけ）であった。