IrelandJapan
Ireland has a population of 5.5M, compared to Japan's 123.2M. Japan is 22.6 times more populous than Ireland. Economically, Japan ($4.03T) has a GDP 6.6 times larger than Ireland's ($609.2B). Japan covers 377,930 km², 5.4 times larger than Ireland's 70,273 km². Life expectancy in Japan stands at 84.0 years, 1.2 years higher than Ireland's 82.9 years.
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Japan wins
Metric
IrelandJapan| Population | 5.5M | 123.2M |
| Area | 70,273 km² | 377,930 km² |
| GDP | $609.2B | $4.03T |
| GDP Per Capita | $112,894.953 | $32,487.078 |
| Life Expectancy | 82.9 yrs | 84.0 yrs |
| Infant Mortality | 3.4 | 1.8 |
| Literacy Rate | — | — |
| Unemployment | 4.6% | 2.5% |
| Capital | Dublin | Tokyo |
| Region | Europe | Asia |
| Languages | English, Irish | Japanese |
| Currencies | EUR (€) | JPY (¥) |
Last updated: April 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 22.6 times more populous than Ireland, with 123.2M residents compared to 5.5M. Ireland is a nation of 5.5M people, while Japan is among the world's 15 most populous countries. In terms of population density, Ireland averages 78 people per km² (moderate), while Japan averages 326 people per km² (dense). Ireland has grown at 1.40% annually over the past decade. Population growth data is not available for Japan.
Economy Comparison
Ireland is classified as a high-income economy, while Japan is classified as a high-income economy. The Japan economy ($4.03T) is 6.6 times larger than Ireland's ($609.2B). Ireland's GDP per capita of $112,894.953 is 303% above the regional average of 28,000 for Europe. 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 Ireland are on average 3.5 times wealthier than those in Japan.
Health & Quality of Life
Life expectancy in Ireland is 82.9 years, compared to 84.0 years in Japan, a gap of 1.2 years. Japan (84.0 years) is 12.0 years above the global average of 72 years, while Ireland (82.9 years) is 10.9 years above the global average of 72 years. At 3.4 deaths per 1,000 live births, Ireland's infant mortality is 89% higher than Japan's 1.8.
Geographic Comparison
Japan (377,930 km²) is 5.4 times larger by land area than Ireland (70,273 km²). Ireland shares borders with 1 country, while Japan borders 0 countries. Ireland spans 1 timezone, compared to Japan's 1 timezone. Ireland lies in Europe, while Japan is located in Asia. Ireland is categorized within the Europe region (Northern Europe), whereas Japan belongs to Asia (Eastern Asia).
Key Differences
The most significant difference between Ireland and Japan is in population: Ireland's 5.5M compared to Japan's 123.2M represents a 96% gap. The most significant difference between Ireland and Japan is in GDP: Ireland's $609.2B compared to Japan's $4.03T represents a 85% gap. The most significant difference between Ireland and Japan is in land area: Ireland's 70,273 km² compared to Japan's 377,930 km² represents a 81% gap. These disparities reflect the broader structural differences between Ireland's high-income economy and Japan's high-income economy.
At a Glance: What the Numbers Mean
Living Standards
Ireland has a GDP per capita of $112,894.953, which is 3.5x 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 Ireland is significantly higher, though cost of living differences partially offset the raw income gap.
Population Density
Japan is 4.2x more densely populated than Ireland (326 vs 78 people per km²). Higher density typically correlates with more urbanization, greater demand for public transit, and higher housing costs. Ireland's lower density suggests more rural land use and potentially lower urban congestion.
Healthcare and Longevity
Citizens of Japan live an average of 1.2 years longer than those of Ireland (84.0 vs 82.9 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
Ireland's economy grew at 2.6% compared to Japan's 0.1%. Both countries show healthy growth, though Ireland has a modest edge in economic dynamism.
Travel Comparison
Ireland vs Japan for Families
For family travel, Japan generally edges ahead due to lower infant mortality (1.8 vs 3.4 per 1,000), which is a useful proxy for healthcare infrastructure and child safety. Ireland 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.
Ireland 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 Ireland. However, Ireland may offer better value in specific categories such as intercity transport or package deals. Shoulder season travel in either country helps reduce costs further.
Ireland vs Japan for Retirees
Japan's life expectancy of 84.0 years suggests stronger healthcare infrastructure, which is a key factor for retirees. Ireland 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.
Ireland vs Japan Cost of Living
Ireland's GDP per capita is 3.5x that of Japan, which generally correlates with a higher cost of living. Housing, dining out, and services tend to be more expensive in Ireland, 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 Ireland's smaller cities.
Ireland vs Japan for Digital Nomads
For digital nomads choosing between Ireland and Japan, key factors include internet infrastructure, visa policies, cost of living, and timezone compatibility with clients. Ireland 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, Ireland or Japan by population?
Japan is larger by population, with 123.2M residents compared to Ireland's 5.5M. Japan is 22.6 times more populous than Ireland.
Which country has a higher GDP, Ireland or Japan?
Japan has the higher GDP at $4.03T, compared to Ireland's $609.2B. Japan's economy is 6.6 times larger.
How does life expectancy compare between Ireland and Japan?
Japan has a higher life expectancy at 84.0 years, compared to Ireland's 82.9 years. The gap between the two countries is 1.2 years. Ireland's life expectancy is 10.9 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, Ireland or Japan?
Japan is larger by land area, covering 377,930 km² compared to Ireland's 70,273 km². Japan is 5.4 times larger than Ireland.
What languages are spoken in Ireland and Japan?
Ireland recognizes the following languages: English, Irish. Japan recognizes: Japanese. The two countries do not share an official language.
Which country has lower inflation, Ireland or Japan?
Ireland has lower inflation at 2.1%, compared to Japan's 2.7%. Ireland'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 Ireland or Japan better for a family holiday?
For family travel, Japan generally edges ahead due to lower infant mortality (1.8 vs 3.4 per 1,000), which is a useful proxy for healthcare infrastructure and child safety. Ireland offers its own advantages, including a more compact geography that is easier to navigate with children. Both countries ...
Is Ireland 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 Ireland. However, Ireland may offer better value in...
Is Ireland or Japan better for retirement?
Japan's life expectancy of 84.0 years suggests stronger healthcare infrastructure, which is a key factor for retirees. Ireland may offer a lower cost of living, which stretches pension income further. Key considerations for retirees include visa and residency requirements, healthcare access, climate...
Is Ireland or Japan more expensive to live in?
Ireland's GDP per capita is 3.5x that of Japan, which generally correlates with a higher cost of living. Housing, dining out, and services tend to be more expensive in Ireland, while Japan offers more purchasing power per dollar for everyday expenses. However, cost of living varies significantly by ...
Is Ireland or Japan better for digital nomads?
For digital nomads choosing between Ireland and Japan, key factors include internet infrastructure, visa policies, cost of living, and timezone compatibility with clients. Ireland spans 1 timezone while Japan covers 1. Japan's lower cost of living makes it attractive for stretching remote income. Bo...