Japan vs United Kingdom of Great Britain and Northern Ireland: Population projections

Japan
87.00 million Persons
in 2070
United Kingdom of Great Britain and Northern Ireland
80.10 million Persons
in 2070
Japan rank
9th
United Kingdom of Great Britain and Northern Ireland rank
12th

Population projections over time

  • Japan
  • United Kingdom of Great Britain and Northern Ireland
025.0M50.0M75.0M100.0M125.0M202420472070

How they compare

Japan currently reports 87.00 million Persons against 80.10 million Persons in United Kingdom of Great Britain and Northern Ireland, a difference of 6.90 million Persons.

That makes Japan's figure about 1.1 times United Kingdom of Great Britain and Northern Ireland's.

Across all 47 years both countries report, Japan has been ahead every year.

Japan ranks 9th and United Kingdom of Great Britain and Northern Ireland ranks 12th of 43 countries.

Japan has averaged higher in every one of the 6 decades both report.

Head to head by decade

Decade Japan United Kingdom of Great Britain and Northern Ireland Difference Ahead
2020s 122.33 million Persons 70.52 million Persons 51.81 million Persons Japan
2030s 116.95 million Persons 73.25 million Persons 43.69 million Persons Japan
2040s 109.20 million Persons 75.94 million Persons 33.26 million Persons Japan
2050s 100.90 million Persons 77.98 million Persons 22.92 million Persons Japan
2060s 92.04 million Persons 79.39 million Persons 12.65 million Persons Japan
2070s 87.00 million Persons 80.10 million Persons 6.90 million Persons Japan

Averages of every year both report within each decade.

Frequently asked questions

Which has higher population projections, Japan or United Kingdom of Great Britain and Northern Ireland?
Japan, at 87.00 million Persons against 80.10 million Persons in United Kingdom of Great Britain and Northern Ireland as of 2070.
What is the difference in population projections between Japan and United Kingdom of Great Britain and Northern Ireland?
6.90 million Persons, with Japan ahead.
How many years of comparable data are there for Japan and United Kingdom of Great Britain and Northern Ireland?
47 years are reported by both, from 2024 to 2070.
How do Japan and United Kingdom of Great Britain and Northern Ireland rank globally for population projections?
Japan ranks 9th and United Kingdom of Great Britain and Northern Ireland ranks 12th of 43 countries.
Where does this data come from?
Organisation for Economic Co-operation and Development, published as Population projections. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Japan vs United Kingdom of Great Britain and Northern Ireland: Population projections. Statizoid, drawing on Organisation for Economic Co-operation and Development. Retrieved 20 August 2026, from https://population.statizoid.com/compare/population-projections/japan/united-kingdom/

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About this data

Indicator
Population projections
Unit
Persons
Source
Organisation for Economic Co-operation and Development
Licence
OECD Terms and Conditions (attribution required)
Coverage
56 places, 2,581 data points, 2024–2070
Last refreshed

This dataset presents annual population projections data up to 2070 by sex and five year age groups as well as the share of children, youth, the elderly, old-age and total dependency ratios. The data is available for all member countries as well as for the EU27 and G20 countries, Argentina, Brazil, China, India, Indonesia, Russia, Saudi Arabia, Singapore, South Africa and the World total. The data refer to mid-year estimates of the population. Population projections are, in most countries, according to medium variant. See country details for the variants retained for each demographic component of total fertility, life expectancy at birth and net annual migration) in Population projection metadata.