United States vs Japan
Side-by-side economic and demographic comparison · 2026 data · Source: IMF & World Bank
The United States and Japan represent the world's first and fourth largest economies. Japan's GDP peaked relative to the US in the early 1990s at roughly 70% of American output, but decades of deflation, demographic decline, and stagnant growth have widened the gap. Japan remains a global leader in automotive manufacturing, robotics, and electronics, while the US dominates in technology, financial services, and higher education. Japan's government debt exceeds 250% of GDP — the highest in the developed world — yet it borrows at near-zero interest rates due to domestic savings and central bank policy.
United States has a GDP of $32.38T compared to Japan's $4.38T, making it 7.4x larger. United States's population is 341.8M vs Japan's 123.4M. Across 12 key indicators, United States leads in 7 categories. All data sourced from the IMF World Economic Outlook and World Bank World Development Indicators.
| Indicator |  United States |  Japan |
|---|---|---|
| GDP (USD) | $32.38T✓ | $4.38T |
| GDP per Capita | $94,430✓ | $35,703 |
| GDP Growth (%) | 2.3%✓ | 0.7% |
| GDP per Capita (PPP) | $94,430✓ | $59,207 |
| Population | 341.8M✓ | 123.4M |
| Life Expectancy | 78.9 years | 84.0 years✓ |
| Inflation (%) | 3.2% | 2.2%✓ |
| Unemployment (%) | 4.4% | 2.5%✓ |
| Govt Debt (% GDP) | 125.8%✓ | 204.4% |
| Fertility Rate | 1.6✓ | 1.1 |
| Gini Index | 41.8 | 32.3✓ |
| CO₂ per Capita (t) | 13.6 | 7.8✓ |
Summary
United States has a GDP of $32.38T compared to Japan's $4.38T, making the former economy 7.4x larger. In terms of population, United States has 341.8M people while Japan has 123.4M. Across the 12 indicators compared, United States leads in 7 and Japan leads in 5.
Why sources report different numbers
The IMF, World Bank and United Nations each publish these series on their own release schedule. Where their figures differ, the reason is usually visible in the reference year rather than in the methodology.
| Source | United States | Japan |
|---|---|---|
| IMF | $32.38T2026 | $4.38T2026 |
| World Bank | $30.77T2025 | $4.44T2025 |
| United Nations | $29.30T2024 | $4.03T2024 |
These are not the same reference year. IMF publishes 2026 and United Nations publishes 2024 — each is the latest that publisher has released, on its own schedule. A figure for a year still in progress is a projection rather than an outturn. United States spans about 11% across 2 years; Japan spans about 10% across 1 year.
| Source | United States | Japan |
|---|---|---|
| IMF | $94,4302026 | $35,7032026 |
| World Bank | $90,0272025 | $35,9512025 |
| United Nations | $84,8172024 | $32,5342024 |
These are not the same reference year. IMF publishes 2026 and United Nations publishes 2024 — each is the latest that publisher has released, on its own schedule. A figure for a year still in progress is a projection rather than an outturn. United States spans about 11% across 2 years; Japan spans about 11% across 1 year.
Figures are reproduced as published by each source, converted to a common unit, with each publisher's own reference year shown. Differences are described, not adjudicated — no source is presented as more correct than another.
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