The officers in this post were in charge of all road-related affairs, including the control of Shukuba-eki (inn-concentrated towns) along the five main roads and their branched roads, the supervision of Sukego (road-related laborers gathered from villages around such a town), and the states of roads and of bridges.
五街道とその付属街道における宿場駅の取締り、助郷の監督、道路・橋梁など道中関係全てを担当した。