There are many cases where regions are divided roughly based on Goki-Shichido in the Ritsuryo era and Go-kaido Road during the Edo period for a transportation system or road map in accordance with the topographical conditions.
交通体系や道路地図などでは地形的条件に則り、律令時代の五畿七道や、江戸時代の五街道などを目安として、地方を区分することが多い。