Fertility in Japan, 1975
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1975
Total fertility rate: 1.92
The total fertility rate of Japan was 1.92 children per woman in 1975 — below the replacement level of about 2.1. Births were most frequent among women aged 25-29 (191 per 1,000 women in that age group), and the average mother was 27.4 years old. In total, 1,971,513 babies were born. Source: United Nations, World Population Prospects 2024.
Key indicators, 1975
Total fertility rate
1.92
Births
1,971,513
Births per 1,000 people
17.4
Mean age of mothers
27.4
Births to mothers aged 15–19
0.8%
Net reproduction rate
0.91
Boys per 100 girls at birth
106.2
Population
113,321,196
The net reproduction rate counts only daughters who survive to their mothers' age: below 1, each generation of women is smaller than the one before.
Fertility by age of mother, 1975
| Mother's age | Births per 1,000 women | Share of total fertility | Births |
|---|---|---|---|
| 10-14 | 0.0 | 0.0% | 16 |
| 15-19 | 4.1 | 1.1% | 16,196 |
| 20-24 | 109.9 | 28.3% | 501,136 |
| 25-29 | 191.0 | 49.1% | 1,074,883 |
| 30-34 | 66.3 | 17.1% | 305,499 |
| 35-39 | 15.1 | 3.9% | 64,575 |
| 40-44 | 2.2 | 0.6% | 8,910 |
| 45-49 | 0.1 | 0.0% | 299 |
| 50-54 | 0.0 | 0.0% | 0 |
Fertility in Japan by year