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EXPLANATION OF MAIN SOURCES AND TERMS

 

POPULATION CENSUS OF JAPAN (Statistics Bureau, Management and Coordination Agency)

The Population Census has been taken repeatedly about every five years since 1920. A large-scale census (1950, 1960, 1970, 1980, and 1990) and a simplified censuses (1955, 1965, 1975, and 1995) are conducted alternately. The 1995 Population Census is the sixteenth census and simplified one. Main differences between a large-scale census and a simplified census is the number of questions asked in questionnairies. An exception to the quinquennial census-taking was the sixth census originally scheduled for 1945 but suspended owing to the influence of the war, and the Extraordinary Population Census was carried out in 1947. However, as the population census was not conducted in 1945 and 1947 in Okinawa-ken, any results of the censuses of those years in this volume do not include the population of Okinawa-ken. The censuses up to the fifth (1941) had been based on "Law Concerning the Population Census," whereas those after the sixth have been taken in conformity with the provisions of the present "Statistics Law."

The 1995 Population Census covered all households and individuals having residence within the territory of Japan as of 0 : 00 a.m. of 1 October 1995 and the census questionnaires were filled out by the method of self-entry (partly by enumerator's entry). The fieldwork of the census was executed through the channels of the Statistics Bureau, Management and Coordination Agency; prefectures; shi (cities), ku (wards), machi (towns), mura (villages); and census enumerators.

 

Type of households

Households are classified into "private households" and "institutional households". A private household is defined as a group of persons sharing living quarters and living expenses, a single person occupying a dwelling house, a single person residing in a boarding house or rented room or a single person residing in a company's dormitory for unmarried employees. An institutional households is defined as a person or a group of persons who do not belong to a private household, such as students in school dormitories, inpatients of hospitals, inmates of social institutions, persons in camps of Self-Defense Forces, inmates of reformatory institutions, and others.

An ordinary household refers to the households excluding single persons residing in boarding houses or rented rooms or single persons residing in company dormitories for unmarried employees. A quasi-household refers to persons or groups of persons other than a person or persons constituting an ordinary household. Single living-in employees who share living quarters with an ordinary household are included in the employer's household. However, for 1960-75, single living-in business employees were grouped into a quasi-

 

 

 

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