Fertility in Japan, 1970
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1970
Total fertility rate: 2.04
The total fertility rate of Japan was 2.04 children per woman in 1970 — below the replacement level of about 2.1. Births were most frequent among women aged 25-29 (199 per 1,000 women in that age group), and the average mother was 27.8 years old. In total, 1,952,254 babies were born. Source: United Nations, World Population Prospects 2024.
Key indicators, 1970
Total fertility rate
2.04
Births
1,952,254
Births per 1,000 people
18.3
Mean age of mothers
27.8
Births to mothers aged 15–19
1.1%
Net reproduction rate
0.96
Boys per 100 girls at birth
107.1
Population
106,712,368
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, 1970
| Mother's age | Births per 1,000 women | Share of total fertility | Births |
|---|---|---|---|
| 10-14 | 0.0 | 0.0% | 20 |
| 15-19 | 4.8 | 1.2% | 22,070 |
| 20-24 | 94.1 | 23.2% | 536,455 |
| 25-29 | 199.2 | 49.2% | 930,503 |
| 30-34 | 84.8 | 20.9% | 369,996 |
| 35-39 | 19.6 | 4.8% | 82,654 |
| 40-44 | 2.7 | 0.7% | 10,171 |
| 45-49 | 0.1 | 0.0% | 322 |
| 50-54 | 0.0 | 0.0% | 64 |
Fertility in Japan by year