In the early tenth century when the nation-governing system changed to an ocho kokka (royal-court state) system, the Kanshiukeoisei system, in which Ritsuryo-based functions and rights were entrusted to specific persons, began.
10世紀初頭、王朝国家体制への移行に伴い、律令機構や権能を特定者へ請け負わせる官司請負制が行なわれ始めた。