During the formation of Hinin, under Kebiishi (officials with judicial and police power), those who had an exclusive privilege worked in 'looking after prisoners, execution, demolition of convict's house, interment of the dead, animal slaughter, cleaning streets, digging well, landscaping, town guard' and etc.
非人の形成期には、検非違使管轄下で「囚人の世話・死刑囚の処刑・罪人宅の破却・死者の埋葬・死牛馬の解体処理・街路の清掃・井戸掘り・造園・街の警備」などを排他的特権的に従事した。