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

United Kingdom vs Japan: population pyramids in 2039

2039Swap

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 2039, the United Kingdom has a population of 73.4 million and Japan 113 million; Japan is about 1.5 times the size of the United Kingdom.

The share aged 65 and over is 23.2% in the United Kingdom and 34.5% in Japan, 11.2 points higher in Japan. The median age is 42.9 years in the United Kingdom and 53.9 years in Japan.

The total fertility rate is 1.53 in the United Kingdom and 1.31 in Japan, both below the replacement level of about 2.1. Life expectancy at birth is 83.6 years in the United Kingdom and 87.0 years in Japan.

By 2050, the population of the United Kingdom is projected to grow by 2.7% and that of Japan to shrink by 7.1% compared with 2039.

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

Figures from 2024 are UN medium-variant projections.

Key figures (2039)

United KingdomJapan
Population73.4 million113 million
Aged 0–1414.8%10.3%
Aged 15–6461.9%55.2%
Aged 65+23.2%34.5%
Median age42.9 yrs53.9 yrs
Old-age dependency37.562.4
Total fertility rate1.531.31
Life expectancy83.6 yrs87.0 yrs
Population growth+0.29%-0.65%
Net migration (per year)+242,358+120,375
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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