Abstract
The authors have been studied on the entire survey of civil engineering heritage in Japan constructed before and including Edo era in the present time, and have re-discovered lots of marvelous heritage until now. Among this survey, one of our three main target is extracting a regionality due to area appeared on the individual heritage. At the first step, we try to find out such regionality in 5 prefectures in Chugoku district, and also try to compare with the regionality in the case of civil engineering heritage in the modernized Japan after 1868, which has been also extracted by the first author several years before. The results will be used in the “Landscape Act (2004)” in Japan, as a feasible course of action to create a historically sustainable region.