日本の都市における人口移動の考察

抄録

This paper undertakes to analyse the recent migration status of urban places in Japan with reference to their functional status, using the data obtained from the censuses of 1950 and 1955. The total net-migration is estimated for all cities and the net-migration by sex and age is estimated for the cities of population of over 200, 000.
In the period between 1950 and 1955, about two-thirds of cities had lost population by migration. The poulation lost by those 330 cities counted to 730 thousand, and on the contrary, the population gained in the rest of the cities counted to 3.2 million. The heavier concentration of population is observed in the bigger cities, that is, the six big cities of Japan occupy more than 80 percent of the total excess of migration of all cities. Out of this, Tokyo has 1.2 million, Osaka 0.4 million. For other cities, industrial and the satellite cities have a big net-migration compared with the size of population. Cities which have a function of commercial or local administrative center are, in general, pull a small amount of population by migration. Those which lost population are ovserved in the cities of newly born by the amalgamation of the towns and villages.
The demographic differentials of migrants are also characterized by the fuction of cities. Especially age differentiation is clearly distinguished by the functions. The big industrial cities gained a population aged at 20-24 by a high migration rate, and local center gained a popoulation aged at 15-19. Metropolitan cities gained the population aged at 15-19 as well as 20-24.
Thus, the amount of in-migration and the demographic differentials are well expressed by the functional differentials of the cities.