Report on the twelfth Japanese national fertility survey. National survey on marriage and fertility: Summary of the survey results regarding married couples.
1. The continuous declines in the average number of children of the couples after 5-9 and 10-14 years of their marriage: The average number of children of the couples who have been married for 0-4 years had been declining since the tenth survey (1992), but it has slightly increased in this survey. On the other hand, the decline of the average number of children of couples who have been married for 5-9 years and 10-14 years, which were observed in the previous survey, have continued. 2. The increase in the percentage of couples with only one child after 5-9 and 10-14 years of their marriage: The distribution of the number of the children was examined in relation to the marriage continuation periods. It was determined that the percentage of couples who have more than one child has declined, and the percentage of those who have only one child has increased since the tenth survey (1992) among couples after 5-9 years of their marriage, and since the eleventh survey in case of the couples after 10-14 years of their marriage. For couples who have been married for 5-9 years the percentage with no children has increased slightly. (excerpt)