Non-agricultural people, including those who presented these items, made their living from the mountains, fields, rivers, and the sea that were originally lands 'not owned by anyone' and were 'beneficial publicly and privately,' however, regulations were initiated by Shoen owners after the disbandment of the Ritsuryo system and the establishment of the Shoen-Koryo system from the 8th Century.
これらを貢納する贄人を初めとする非農業民は、従来「無主」にして「公私共利」の地とされた山野河海の利用により生業をたてていたが、8世紀以降の律令制の解体、荘園公領制の成立とともに、荘園領主による制約を受けるようになってきた。