Japan vs United States
Japan has a population of 123.2M, compared to United States's 340.1M. United States is 2.8 times more populous than Japan. Economically, United States ($28.75T) has a GDP 7.1 times larger than Japan's ($4.03T). United States covers 9,525,067 km², 25.2 times larger than Japan's 377,930 km². Life expectancy in Japan stands at 84.0 years, 5.7 years higher than United States's 78.4 years.
JapanUnited States| Population | -63.8%123.2M | +176.0%340.1M |
| Area | -96.0%377,930 km² | +2420.3%9,525,067 km² |
| GDP | -86.0%$4.03T | +613.8%$28.75T |
| GDP Per Capita | -61.6%$32,487.078 | +160.2%$84,534.041 |
| Life Expectancy | +7.2%84.0 yrs | -6.7%78.4 yrs |
| Infant Mortality | -67.3%1.8 | +205.6%5.5 |
| Literacy Rate | — | — |
| Unemployment | -41.6%2.5% | +71.3%4.2% |
| Capital | Tokyo | Washington, D.C. |
| Region | Asia | Americas |
| Languages | Japanese | English |
| Currencies | JPY (¥) | USD ($) |
Last updated: March 2026
All data sourced from World Bank Open Data (2025) and REST Countries API. Economic data may reflect most recent available year.
Population Comparison
United States is 2.8 times more populous than Japan, with 340.1M residents compared to 123.2M. Japan is among the world's 15 most populous countries, while United States is among the world's 15 most populous countries. In terms of population density, Japan averages 326 people per km² (dense), while United States averages 36 people per km² (sparse). United States has grown at 0.62% annually over the past decade. Population growth data is not available for Japan.
Economy Comparison
Japan is classified as a high-income economy, while United States is classified as a high-income economy. The United States economy ($28.75T) is 7.1 times larger than Japan's ($4.03T). Japan's GDP per capita of $32,487.078 is 190% above the regional average of 11,200 for Asia. United States's GDP per capita of $84,534.041 is 526% above the regional average of 13,500 for Americas. On a per-capita basis, residents of United States are on average 2.6 times wealthier than those in Japan.
Health & Quality of Life
Life expectancy in Japan is 84.0 years, compared to 78.4 years in United States, a gap of 5.7 years. Japan (84.0 years) is 12.0 years above the global average of 72 years, while United States (78.4 years) is 6.4 years above the global average of 72 years. At 5.5 deaths per 1,000 live births, United States's infant mortality is 206% higher than Japan's 1.8.
Geographic Comparison
United States (9,525,067 km²) is 25.2 times larger by land area than Japan (377,930 km²). Japan shares borders with 0 countries, while United States borders 2 countries. Japan spans 1 timezone, compared to United States's 11 timezones. Japan lies in Asia, while United States is located in North America. Japan is categorized within the Asia region (Eastern Asia), whereas United States belongs to Americas (North America).
Key Differences
The most significant difference between Japan and United States is in land area: Japan's 377,930 km² compared to United States's 9,525,067 km² represents a 96% gap. The most significant difference between Japan and United States is in GDP: Japan's $4.03T compared to United States's $28.75T represents a 86% gap. The most significant difference between Japan and United States is in infant mortality: Japan's 1.8 per 1,000 compared to United States's 5.5 per 1,000 represents a 67% gap. These disparities reflect the broader structural differences between Japan's high-income economy and United States's high-income economy.
At a Glance: What the Numbers Mean
Living Standards
United States has a GDP per capita of $84,534.041, which is 2.6x that of Japan ($32,487.078). This gap reflects differences in economic development, industrial structure, and workforce productivity. In practical terms, average purchasing power in United States is significantly higher, though cost of living differences partially offset the raw income gap.
Population Density
Japan is 9.1x more densely populated than United States (326 vs 36 people per km²). Higher density typically correlates with more urbanization, greater demand for public transit, and higher housing costs. United States's lower density suggests more rural land use and potentially lower urban congestion.
Healthcare and Longevity
Citizens of Japan live an average of 5.7 years longer than those of United States (84.0 vs 78.4 years). This gap reflects differences in healthcare access, nutrition, public health infrastructure, and environmental factors. This is a substantial gap that suggests significant differences in healthcare systems and overall living conditions.
Economic Momentum
United States's economy grew at 2.8% compared to Japan's 0.1%. Both countries show healthy growth, though United States has a modest edge in economic dynamism.
Frequently Asked Questions
Which is bigger, Japan or United States by population?
United States is larger by population, with 340.1M residents compared to Japan's 123.2M. United States is 2.8 times more populous than Japan.
Which country has a higher GDP, Japan or United States?
United States has the higher GDP at $28.75T, compared to Japan's $4.03T. United States's economy is 7.1 times larger.
How does life expectancy compare between Japan and United States?
Japan has a higher life expectancy at 84.0 years, compared to United States's 78.4 years. The gap between the two countries is 5.7 years. Japan's life expectancy is 12.0 years above the global average of 72 years, while United States's is 6.4 years above the global average of 72 years.
Which country is larger by area, Japan or United States?
United States is larger by land area, covering 9,525,067 km² compared to Japan's 377,930 km². United States is 25.2 times larger than Japan.
What languages are spoken in Japan and United States?
Japan recognizes the following official language: Japanese. United States recognizes: English. The two countries do not share an official language.
Which country has lower inflation, Japan or United States?
Japan has lower inflation at 2.7%, compared to United States's 2.9%. Japan's inflation is within the 2-3% range considered stable by most central banks, while United States's rate is within the 2-3% range considered stable by most central banks.