As an imperial commissioner which was unregulated by the ritsuryo codes (ryoge no kan), 'junsatsushi' was in charge of the inspection of the operations of local governments under the command of the emperor himself, directly reporting to the emperor on the performance evaluation of the local officials, such as 'shishi' (provincial governors) and 'kenrei' (prefectural governors).
律令には規定のない使職（令外官）の一つであり、皇帝の命令によって、地方の監察を行い、州の刺史や県の県令などの地方官の勤務評定を上進した。