Fertility in Japan, 1955
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1955
Total fertility rate: 2.35
The total fertility rate of Japan was 2.35 children per woman in 1955 — above the replacement level of about 2.1. Births were most frequent among women aged 25-29 (180 per 1,000 women in that age group), and the average mother was 28.9 years old. In total, 1,818,391 babies were born. Source: United Nations, World Population Prospects 2024.
Key indicators, 1955
Total fertility rate
2.35
Births
1,818,391
Births per 1,000 people
19.7
Mean age of mothers
28.9
Births to mothers aged 15–19
1.5%
Net reproduction rate
1.05
Boys per 100 girls at birth
105.8
Population
92,425,478
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, 1955
| Mother's age | Births per 1,000 women | Share of total fertility | Births |
|---|---|---|---|
| 10-14 | 0.0 | 0.0% | 17 |
| 15-19 | 5.9 | 1.2% | 26,557 |
| 20-24 | 109.6 | 23.3% | 487,765 |
| 25-29 | 179.8 | 38.1% | 726,844 |
| 30-34 | 112.2 | 23.8% | 393,721 |
| 35-39 | 50.2 | 10.7% | 146,661 |
| 40-44 | 12.7 | 2.7% | 34,703 |
| 45-49 | 0.8 | 0.2% | 1,924 |
| 50-54 | 0.1 | 0.0% | 199 |
Fertility in Japan by year