Births per 1,000 women, by age of mother
Fertility in Japan, 2011
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2011
Total fertility rate: 1.36
The total fertility rate of Japan was 1.36 children per woman in 2011 — below the replacement level of about 2.1. Births were most frequent among women aged 30-34 (93 per 1,000 women in that age group), and the average mother was 30.6 years old. In total, 1,050,600 babies were born. Source: United Nations, World Population Prospects 2024.
Key indicators, 2011
Total fertility rate
1.36
Births
1,050,600
Births per 1,000 people
8.2
Mean age of mothers
30.6
Births to mothers aged 15–19
1.2%
Net reproduction rate
0.66
Boys per 100 girls at birth
105.5
Population
128,096,432
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, 2011
| Mother's age | Births per 1,000 women | Share of total fertility | Births |
|---|---|---|---|
| 10-14 | 0.0 | 0.0% | 65 |
| 15-19 | 4.5 | 1.6% | 12,998 |
| 20-24 | 33.9 | 12.4% | 102,995 |
| 25-29 | 86.2 | 31.6% | 298,161 |
| 30-34 | 93.2 | 34.2% | 372,701 |
| 35-39 | 46.0 | 16.9% | 223,877 |
| 40-44 | 8.7 | 3.2% | 38,960 |
| 45-49 | 0.2 | 0.1% | 843 |
| 50-54 | 0.0 | 0.0% | 0 |
Fertility in Japan by year