World Population PyramidsPopulation pyramids and indicators by country and year日本語

Japan vs United States of America: population pyramids in 2020

2020Swap

JapanUnited States of America

1%0.75%0.5%0.25%0%0.25%0.5%0.75%1%0102030405060708090100MaleFemale

Each bar is the share of the total population at that single year of age (men left, women right), so countries of different sizes can be compared.

Japan and United States of America compared

In 2020, Japan has a population of 126.5 million and the United States of America 339.1 million; the United States of America is about 2.7 times the size of Japan.

The share aged 65 and over is 28.7% in Japan and 15.9% in the United States of America, 12.8 points higher in Japan. The median age is 48.4 years in Japan and 38.1 years in the United States of America.

The total fertility rate is 1.30 in Japan and 1.62 in the United States of America, both below the replacement level of about 2.1. Life expectancy at birth is 84.7 years in Japan and 77.0 years in the United States of America.

By 2050, the population of Japan is projected to shrink by 16.9% and that of the United States of America to grow by 12.1% compared with 2020.

GDP per person is $36K in Japan (2025) and $90K in the United States of America (2025).

Key figures (2020)

JapanUnited States of America
Population126.5 million339.1 million
Aged 0–1412.3%18.5%
Aged 15–6459.0%65.6%
Aged 65+28.7%15.9%
Median age48.4 yrs38.1 yrs
Old-age dependency48.624.2
Total fertility rate1.301.62
Life expectancy84.7 yrs77.0 yrs
Population growth-0.43%+0.17%
Net migration (per year)+42,001+329,769
GDP$4.44T (2025)$30.8T (2025)
GDP per person$36K (2025)$90K (2025)
Unemployment2.5% (2025)4.2% (2025)

Economic figures are the latest year published for each country.

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