Abstract： The recent declining birthrate and aging society and the progress of depopulation have resulted in spongy cities, causing various problems.
This research deals with the population
spatial distribution of the local cities by means of classification cities based on the area classification in city planning area, densely inhabited district and population density.
Main results are as follows (1) the spongy situation in densely inhabited district is progressing, (2) the spongy city areas outside the three major metropolitan areas is progressing greatly, (3) based on area
division, densely inhabited district and population density, the local cities are classified into 4 types, (4) the city can be compared with other cities by the classification, and the task can be clarified.