Around the tenth century during the Heian period when a large social change occurred, the Imperial court abandoned the policy of entrusting tax-collecting affairs and military affairs solely to the central government system and promoted to entrust these affairs to kokushi (provincial governors) or rich persons, or, in other words, to introduce the kanshiukeoi-sei system.
平安期の10世紀頃、大きな社会変化を背景として、朝廷は、徴税・軍事をもはや官司機構で担うのではなく、国司や富豪などへ請け負わせる官司請負制への転換を進めていた。