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

United Kingdom vs Japan: population pyramids in 2020

2020Swap

United KingdomJapan

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.

United Kingdom and Japan compared

In 2020, the United Kingdom has a population of 67.3 million and Japan 126.5 million; Japan is about 1.9 times the size of the United Kingdom.

The share aged 65 and over is 18.5% in the United Kingdom and 28.7% in Japan, 10.2 points higher in Japan. The median age is 40.2 years in the United Kingdom and 48.4 years in Japan.

The total fertility rate is 1.57 in the United Kingdom and 1.30 in Japan, both below the replacement level of about 2.1. Life expectancy at birth is 80.4 years in the United Kingdom and 84.7 years in Japan.

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

GDP per person is $58K in the United Kingdom (2025) and $36K in Japan (2025).

Key figures (2020)

United KingdomJapan
Population67.3 million126.5 million
Aged 0–1418.0%12.3%
Aged 15–6463.5%59.0%
Aged 65+18.5%28.7%
Median age40.2 yrs48.4 yrs
Old-age dependency29.248.6
Total fertility rate1.571.30
Life expectancy80.4 yrs84.7 yrs
Population growth+0.21%-0.43%
Net migration (per year)+144,221+42,001
GDP$4T (2025)$4.44T (2025)
GDP per person$58K (2025)$36K (2025)
Unemployment4.8% (2025)2.5% (2025)

Economic figures are the latest year published for each country.

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