At that time in Japan, to ensure the tax collection from the kokuga region, ancient units such as gun and go were reorganized into medieval units such as gun, go, and ho, and zaichokanjin were mainly appointed as gunshi, goshi, and hoshi who supervised these units.
当時、国衙領からの租税収取を確保するために、国内が古代的な郡・郷から中世的な郡・郷・保という単位に再編成されていたが、これを管轄する郡司・郷司・保司に任命されたのも、主に在庁官人であった。