The roads (6-12 meters wide) of ancient Japan which linked central government with regional administration organizations were built, and seki (barriers) and umaya (facilities for providing houses, food, etc.) were constructed.
中央政府と地方行政組織を結ぶ日本の古代道路（幅約6～12メートル）が整備され、さらに、関や駅なども整備された。