The Estimate and the Analvsis of Net-migration of Japan by Prefectures and by Sex and Age : 1950-95

本文对1950 ~ 1995年日本各都道府县按年龄和性别划分的9个时期（每个时期为5年）的净移民进行了估算，结果表明：（1）总的净移民表明，在过去的战争中，日本出现了移民转变。(2)但是，如果我们观察到10岁和14岁以及15岁至19岁年龄组的净移徙，我们就不能这样说，因为在大都市地区，他们在所有时期都是净移徙。只有20 ~ 34岁年龄组经历了迁移转变，这是因为他们在大都市圈的净迁移已经从净出迁移转变为净出迁移。（3）从大都市圈累计净迁移量得到的迁移历史表明，从迁移对人口分布的影响来看，日本没有发生迁移转变。由于所有年龄组的累计净迁移率均超过100%，（4）在都道府县观察到的各年龄组净迁移率的共同模式是，在大都市地区，10至19岁年龄组的净迁入率高，而在非大都市地区，相同年龄组的净迁出率高。

The net-migration by age and sex of prefectures in Japan, of 9 periods, each of which are of 5 years, between 1950 and 1995 were estimated.From these data, it can be pointed out that (l) the overall net-migration shows that the migration transition was observed in the past war Japan. (2) but, we cannot say so, if we observe net-migration of age groups of 10 and 14 and of 15 to 19, because they had been net-in-migration for all periods in metropolitan regions. Only age groups of ages between 20 and 34 had experienced migration transition, because their net-migration had changed from net-out-migration to net-out-migration in the metropolitan regions, (3) the migration history obtained from the accumulated net-migration in the metropolitan regions show that the migration transition did not ocured in Japan in a sense o effect of migration on the population distribution, because all age cohorts had an accumulated net-migration rate of over 100%, (4) the common pattern of net-migration rate by age groups observed in prefectures is that, in metropolitan regions, high rate of net-in-migration in the age groups between 10 and 19, and that, in non-metropolitan regions, rate of net-out-migration in the same age groups.