---
title: "Ireland vs Japan — area, population, currency"
description: "Ireland is 70,273 km² with 5,484,367 people; Japan is 377,915 km² with 123,366,734. Area, density, currency, languages and time zones side by side."
url: https://atoneplace.net/country-vs/ireland-vs-japan/
site: "At One Place"
---

# Ireland vs Japan

**Ireland vs Japan: Japan is larger; Japan has more people**

70,273 km² vs 377,915 km² · 5,484,367 vs 123,366,734

Japan is 5.4 times larger than Ireland — 377,915 against 70,273 km². Japan is 22 times more populous than Ireland — 123,366,734 against 5,484,367 people.

## Side by side

|  | Ireland | Japan |
| --- | --- | --- |
| Capital | Dublin | Tokyo |
| Area | 70,273 km² | 377,915 km² |
| Population | 5,484,367 (2025) | 123,366,734 (2025) |
| Density | 78.0 /km² | 326.4 /km² |
| Currency | Euro (EUR) | Japanese yen (JPY) |
| Official languages | English, Irish | Japanese |
| Time zones | UTC+00:00 | UTC+09:00 |
| Calling code | +353 | +81 |
| Drives on the | left | left |
| Continent | Europe | Asia |
| ISO codes | IE / IRL | JP / JPN |

## Population density

Japan is 4.2 times more densely populated than Ireland — 326 against 78 people per km². Density is where area and population interact, and it often reverses the impression the headline figures give — a large country with a small population can feel emptier than a small crowded one by an enormous margin.

## Practical differences

- Different currencies: the Euro and the Japanese yen.
- Different continents — Europe and Asia.

## Ireland

The interior is a low limestone plain ringed by coastal mountains, which is why the rivers drain inward and the middle of the country is bog. The Cliffs of Moher run 14 km and reach 214 m. Ireland has no native snakes, and only one native reptile.

## Japan

A 2023 government survey using digital mapping counted 14,125 islands, more than double the long-quoted figure of 6,852. About three-quarters of the land is mountain, so nearly everyone lives on a narrow band of coastal plain. Japan sits where four tectonic plates meet and records a fifth of the world's magnitude-6-and-above earthquakes.

> Neutral facts only. Nothing here addresses politics, government, economics or which country is preferable in any respect — population is the one figure that dates, and it carries its year.

## Common questions

### Is Ireland bigger than Japan?

Japan is larger — 377,915 km² against 70,273 km².

### Which has more people, Ireland or Japan?

Japan, with 123,366,734 against 5,484,367.

### What is the time difference between Ireland and Japan?

Ireland is UTC+00:00 and Japan is UTC+09:00. Daylight saving shifts the gap during the year in places that observe it.

## Related pages

- [Ireland](https://atoneplace.net/country/ireland/)
- [Japan](https://atoneplace.net/country/japan/)
- [India vs Japan](https://atoneplace.net/country-vs/india-vs-japan/)
- [India vs Ireland](https://atoneplace.net/country-vs/india-vs-ireland/)
- [China vs Japan](https://atoneplace.net/country-vs/china-vs-japan/)
- [China vs Ireland](https://atoneplace.net/country-vs/china-vs-ireland/)
- [Japan vs United States](https://atoneplace.net/country-vs/japan-vs-united-states/)
- [Japan vs United Kingdom](https://atoneplace.net/country-vs/japan-vs-united-kingdom/)
- [Japan vs New Zealand](https://atoneplace.net/country-vs/japan-vs-new-zealand/)
- [Japan vs Russia](https://atoneplace.net/country-vs/japan-vs-russia/)
- [Japan vs Mexico](https://atoneplace.net/country-vs/japan-vs-mexico/)
- [Japan vs Spain](https://atoneplace.net/country-vs/japan-vs-spain/)
- [Japan vs South Korea](https://atoneplace.net/country-vs/japan-vs-south-korea/)
- [Japan vs Netherlands](https://atoneplace.net/country-vs/japan-vs-netherlands/)

## Sources

- The World Factbook — Central Intelligence Agency (https://www.cia.gov/the-world-factbook/) [Public domain (US Government)]
- World Bank Open Data — The World Bank (https://data.worldbank.org/) [CC BY 4.0]