人口流出と世帯構成の変動--三河湾にある1島嶼の人口について
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概要
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Effects of out-migration upon households composition are not necessarily fixed. According to variation of demographic characteristics of out-migrants, households com-position may change in different ways. This paper aims to enumerate the size of out-migration and clarify the change of households composition, using the residents-registry on Sakushima (Mikawa-Bay, Aichi-Prefecture) from 1955 to 1977. Here the out-migration are classified into 4 types as follows:(A) Migrants move alone and he or she is a part of members of his or her household on Salcushima.(B) Migrants move alone and he or she is a sole member of the household on Sakushima (at the time of out-migration, he or she lives alone).(C) Migrants move together with other members of his or her household and they are a part of members of their household on Sakushima.(D) Migrants move together with other members of his or her household and they themselves consist of the household. The type of out-migration by age is as follows:(1) Out-migrants of age 0-14 mainly belong to type (C) and (D).(2) Out-migrants of age 15.29 account for over 70% of all out-migrants and over 90% of them belong to type (A).(3) Out-migrants of age 30.44 belong to type (C) and (D).(4) Outrmigrants of age 45-59 belong mainly to type (C) and (D), even though type (B) accounts for over 30%.(5) Almost 70% of out-migrants of age 60 and over belong to type (B). The main streams of households composition change are due to following threeways:(1) A couple and their child(ren) → A couple only(2) Parent and his or her child(ren) → One-person household(3) A couple - One person household In spite of the main stream toward one-person household in the observation periods, the number of one-person households has not increased since 1970. It has been resulted from the increase of out-migration of type (B). This change of households composition side-by-side with the aging of population after a continuous out-migration of younger ages may create an another phase of out-migration.
- 日本民族衛生学会の論文