---
title: "Indonesia vs Japan — area, population, currency"
description: "Indonesia is 1,904,569 km² with 285,721,236 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/indonesia-vs-japan/
site: "At One Place"
---

# Indonesia vs Japan

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

1,904,569 km² vs 377,915 km² · 285,721,236 vs 123,366,734

Indonesia is 5.0 times larger than Japan — 1,904,569 against 377,915 km². Indonesia is 2.3 times more populous than Japan — 285,721,236 against 123,366,734 people.

## Side by side

|  | Indonesia | Japan |
| --- | --- | --- |
| Capital | Jakarta | Tokyo |
| Area | 1,904,569 km² | 377,915 km² |
| Population | 285,721,236 (2025) | 123,366,734 (2025) |
| Density | 150.0 /km² | 326.4 /km² |
| Currency | Indonesian rupiah (IDR) | Japanese yen (JPY) |
| Official languages | Indonesian | Japanese |
| Time zones | UTC+07:00, UTC+08:00, UTC+09:00 | UTC+09:00 |
| Calling code | +62 | +81 |
| Drives on the | left | left |
| Continent | Asia | Asia |
| ISO codes | ID / IDN | JP / JPN |

## Population density

Japan is 2.2 times more densely populated than Indonesia — 326 against 150 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 Indonesian rupiah and the Japanese yen.
- Indonesia spans 3 time zones, so "local time" there is not a single answer.

## Indonesia

The largest archipelago in the world: official surveys count more than 17,000 islands, of which around 6,000 are inhabited, spread over 5,100 km of ocean. Indonesia sits on the Pacific Ring of Fire and has about 130 active volcanoes, more than any other country. It also holds more of the world's remaining tropical peatland than anywhere except the Congo basin.

## 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 Indonesia bigger than Japan?

Indonesia is larger — 1,904,569 km² against 377,915 km².

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

Indonesia, with 285,721,236 against 123,366,734.

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

Indonesia is UTC+07:00, UTC+08:00, UTC+09:00 and Japan is UTC+09:00. Daylight saving shifts the gap during the year in places that observe it.

## Related pages

- [Indonesia](https://atoneplace.net/country/indonesia/)
- [Japan](https://atoneplace.net/country/japan/)
- [India vs Japan](https://atoneplace.net/country-vs/india-vs-japan/)
- [India vs Indonesia](https://atoneplace.net/country-vs/india-vs-indonesia/)
- [China vs Japan](https://atoneplace.net/country-vs/china-vs-japan/)
- [China vs Indonesia](https://atoneplace.net/country-vs/china-vs-indonesia/)
- [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]