South Korea vs Japan
South Korea has a population of 51.2M, compared to Japan's 123.2M. Japan is 2.4 times more populous than South Korea. Economically, Japan ($4.03T) has a GDP 2.1 times larger than South Korea's ($1.88T). Japan covers 377,930 km², 3.8 times larger than South Korea's 100,210 km². Life expectancy in Japan stands at 84.0 years, 0.6 years higher than South Korea's 83.4 years.
South KoreaJapan| Population | -58.5%51.2M | +140.8%123.2M |
| Area | -73.5%100,210 km² | +277.1%377,930 km² |
| GDP | -53.4%$1.88T | +114.8%$4.03T |
| GDP Per Capita | +11.5%$36,238.64 | -10.4%$32,487.078 |
| Life Expectancy | -0.7%83.4 yrs | +0.7%84.0 yrs |
| Infant Mortality | +27.8%2.3 | -21.7%1.8 |
| Literacy Rate | — | — |
| Unemployment | +9.5%2.7% | -8.6%2.5% |
| Capital | Seoul | Tokyo |
| Region | Asia | Asia |
| Languages | Korean | Japanese |
| Currencies | KRW (₩) | JPY (¥) |
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
Japan is 2.4 times more populous than South Korea, with 123.2M residents compared to 51.2M. South Korea is among the world's 30 most populous countries, while Japan is among the world's 15 most populous countries. In terms of population density, South Korea averages 511 people per km² (dense), while Japan averages 326 people per km² (dense). South Korea has grown at 0.25% annually over the past decade. Population growth data is not available for Japan.
Economy Comparison
South Korea is classified as a high-income economy, while Japan is classified as a high-income economy. The Japan economy ($4.03T) is 2.1 times larger than South Korea's ($1.88T). South Korea's GDP per capita of $36,238.64 is 224% above the regional average of 11,200 for Asia. Japan's GDP per capita of $32,487.078 is 190% above the regional average of 11,200 for Asia. On a per-capita basis, residents of South Korea are on average 1.1 times wealthier than those in Japan.
Health & Quality of Life
Life expectancy in South Korea is 83.4 years, compared to 84.0 years in Japan, a gap of 0.6 years. Japan (84.0 years) is 12.0 years above the global average of 72 years, while South Korea (83.4 years) is 11.4 years above the global average of 72 years. At 2.3 deaths per 1,000 live births, South Korea's infant mortality is 28% higher than Japan's 1.8.
Geographic Comparison
Japan (377,930 km²) is 3.8 times larger by land area than South Korea (100,210 km²). South Korea shares borders with 1 country, while Japan borders 0 countries. South Korea spans 1 timezone, compared to Japan's 1 timezone. Both South Korea and Japan are located in Asia. Both countries fall within the Asia region, though they occupy different subregions: Eastern Asia and Eastern Asia.
Key Differences
The most significant difference between South Korea and Japan is in land area: South Korea's 100,210 km² compared to Japan's 377,930 km² represents a 73% gap. The most significant difference between South Korea and Japan is in population: South Korea's 51.2M compared to Japan's 123.2M represents a 58% gap. The most significant difference between South Korea and Japan is in GDP: South Korea's $1.88T compared to Japan's $4.03T represents a 53% gap. These disparities reflect the broader structural differences between South Korea's high-income economy and Japan's high-income economy.
At a Glance: What the Numbers Mean
Living Standards
South Korea has a GDP per capita of $36,238.64, which is 1.1x 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 South Korea is significantly higher, though cost of living differences partially offset the raw income gap.
Population Density
South Korea is 1.6x more densely populated than Japan (511 vs 326 people per km²). Higher density typically correlates with more urbanization, greater demand for public transit, and higher housing costs. Japan's lower density suggests more rural land use and potentially lower urban congestion.
Healthcare and Longevity
Citizens of Japan live an average of 0.6 years longer than those of South Korea (84.0 vs 83.4 years). This gap reflects differences in healthcare access, nutrition, public health infrastructure, and environmental factors. This is a moderate difference that could narrow with continued development.
Economic Momentum
South Korea's economy grew at 2.0% compared to Japan's 0.1%. Both countries show healthy growth, though South Korea has a modest edge in economic dynamism.
Travel Comparison
South Korea vs Japan for Families
For family travel, Japan generally edges ahead due to lower infant mortality (1.8 vs 2.3 per 1,000), which is a useful proxy for healthcare infrastructure and child safety. South Korea offers its own advantages, including a more compact geography that is easier to navigate with children. Both countries have family-friendly attractions, though Japan's higher GDP per capita typically correlates with better tourist infrastructure, public transport, and English-language availability.
South Korea vs Japan for Budget Travelers
Japan is typically the more budget-friendly destination, with a GDP per capita of $32,487.078 translating to lower prices for accommodation, food, and local transport. Budget travelers in Japan can expect to spend significantly less per day than in South Korea. However, South Korea may offer better value in specific categories such as intercity transport or package deals. Shoulder season travel in either country helps reduce costs further.
South Korea vs Japan for Retirees
Japan's life expectancy of 84.0 years suggests stronger healthcare infrastructure, which is a key factor for retirees. South Korea may offer a lower cost of living, which stretches pension income further. Key considerations for retirees include visa and residency requirements, healthcare access, climate preferences, and proximity to international airports. Both countries have established expat communities, though the specific visa options and healthcare quality vary by region within each country.
South Korea vs Japan Cost of Living
South Korea's GDP per capita is 1.1x that of Japan, which generally correlates with a higher cost of living. Housing, dining out, and services tend to be more expensive in South Korea, while Japan offers more purchasing power per dollar for everyday expenses. However, cost of living varies significantly by city within each country. Major urban centers in Japan can approach or exceed average costs in South Korea's smaller cities.
South Korea vs Japan for Digital Nomads
For digital nomads choosing between South Korea and Japan, key factors include internet infrastructure, visa policies, cost of living, and timezone compatibility with clients. South Korea spans 1 timezone while Japan covers 1. Japan's lower cost of living makes it attractive for stretching remote income. Both countries have growing digital nomad communities, though specific visa requirements for remote workers differ and should be verified before committing to a longer stay.
Frequently Asked Questions
Which is bigger, South Korea or Japan by population?
Japan is larger by population, with 123.2M residents compared to South Korea's 51.2M. Japan is 2.4 times more populous than South Korea.
Which country has a higher GDP, South Korea or Japan?
Japan has the higher GDP at $4.03T, compared to South Korea's $1.88T. Japan's economy is 2.1 times larger.
How does life expectancy compare between South Korea and Japan?
Japan has a higher life expectancy at 84.0 years, compared to South Korea's 83.4 years. The gap between the two countries is 0.6 years. South Korea's life expectancy is 11.4 years above the global average of 72 years, while Japan's is 12.0 years above the global average of 72 years.
Which country is larger by area, South Korea or Japan?
Japan is larger by land area, covering 377,930 km² compared to South Korea's 100,210 km². Japan is 3.8 times larger than South Korea.
What languages are spoken in South Korea and Japan?
South Korea recognizes the following official language: Korean. Japan recognizes: Japanese. The two countries do not share an official language.
Which country has lower inflation, South Korea or Japan?
South Korea has lower inflation at 2.3%, compared to Japan's 2.7%. South Korea's inflation is within the 2-3% range considered stable by most central banks, while Japan's rate is within the 2-3% range considered stable by most central banks.
Is South Korea or Japan better for a family holiday?
For family travel, Japan generally edges ahead due to lower infant mortality (1.8 vs 2.3 per 1,000), which is a useful proxy for healthcare infrastructure and child safety. South Korea offers its own advantages, including a more compact geography that is easier to navigate with children. Both countr...
Is South Korea or Japan cheaper to visit?
Japan is typically the more budget-friendly destination, with a GDP per capita of $32,487.078 translating to lower prices for accommodation, food, and local transport. Budget travelers in Japan can expect to spend significantly less per day than in South Korea. However, South Korea may offer better ...
Is South Korea or Japan better for retirement?
Japan's life expectancy of 84.0 years suggests stronger healthcare infrastructure, which is a key factor for retirees. South Korea may offer a lower cost of living, which stretches pension income further. Key considerations for retirees include visa and residency requirements, healthcare access, cli...
Is South Korea or Japan more expensive to live in?
South Korea's GDP per capita is 1.1x that of Japan, which generally correlates with a higher cost of living. Housing, dining out, and services tend to be more expensive in South Korea, while Japan offers more purchasing power per dollar for everyday expenses. However, cost of living varies significa...
Is South Korea or Japan better for digital nomads?
For digital nomads choosing between South Korea and Japan, key factors include internet infrastructure, visa policies, cost of living, and timezone compatibility with clients. South Korea spans 1 timezone while Japan covers 1. Japan's lower cost of living makes it attractive for stretching remote in...