This longitudinal, approval statistical survey follows the same subjects over a long period, and has been conducted since the Fiscal Year 2001. The purpose of this survey is to obtain basic data for planning and implementing various policy measures, including countermeasures against the falling birthrate, designed by the Ministry of Health, Labour and Welfare, through monitoring the status of babies born in the first year of the 21 century, and their changes over the years.


This survey is targeted at babies, including each of the twins and triplets, who were born in Japan during the periods between January 10 - 17 and July 10 - 17, 2001. The Ministry of Health, Labour and Welfare sampled the survey subjects based on the Vital Statistics Data.

3.Dates of the Survey

The survey was conducted on August 1, 2004 for infants born in January, and on February 1, 2005 for those born in July (The age of the infants: 42 months old).

4.Contents of the Survey

The survey items included: family members living together; caregivers; employment status of parents; particular points of care concerning the child health; status of discipline; response to bad behavior; bedtime and wakeup time; concerns about children's eating behaviors; illness and injuries; status of playing with other children; hours spent watching TV; hours playing computer games; paid lessons; children's characters; satisfactions from child rearing; burdens and worries about child rearing; whom to ask for advice about child rearing; and others.

5.Method of the Survey

The questionnaires were delivered and collected by post.

6.Collection of the Questionnaires

The numbers of questionnaires delivered and collected were as follows:

   Babies born in January Babies born in July Total
No. of questionnaires delivered No. of questionnaires collected Rate of collection No. of questionnaires delivered No. of questionnaires collected Rate of collection No. of questionnaires delivered No. of questionnaires collected Rate of collection
1st survey 26,620 23,423 88.0% 26,955 23,592 87.5% 53,575 47,015 87.8%
2nd survey 23,391 21,923 93.7% 23,575 22,002 93.3% 46,966 43,925 93.5%
3rd survey 23,374 21,365 91.4% 23,523 21,447 91.2% 46,897 42,812 91.3%
4th survey   22,439   20,699   92.2%   22,398   20,858   93.1%   44,837   41,557   92.7%  


1)Symbols used in tables

Magnitude zero     -
Data not available or the indication of data inappropriate     ...
Minor proportion less than 0.05     0.0

2)The numbers indicated in this outline are rounded. The grand total may not equal the sum of the breakdown numbers.

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