2019 Volume 75 Issue 2 Pages I_49-I_54
The population trends of the administerative districts including frequently flooded areas (FFA) in Japan was analyzed and compared between the districts with different geographical classification. As a result, we found that different trend could be seen between different geography. For example, districts with small rivers and wide plain tended to have high population density and less future population decrease. These differences were considered to reflect the social positioning of each FFA.