Iceland vs Japan: Installed geothermal energy capacity
Iceland
787.58 megawatts
in 2025
Japan
468.91 megawatts
in 2025
Iceland rank
8th
Japan rank
10th
Installed geothermal energy capacity over time
- Iceland
- Japan
How they compare
Iceland currently reports 787.58 megawatts against 468.91 megawatts in Japan, a difference of 318.67 megawatts.
That makes Iceland's figure about 1.7 times Japan's.
The two have swapped places 1 time across 26 shared years of data; in 2000 it was Japan ahead.
Iceland ranks 8th and Japan ranks 10th of 32 countries.
Across the 3 decades both report, Iceland averaged higher in 2 and Japan in 1.
Head to head by decade
| Decade | Iceland | Japan | Difference | Ahead |
|---|---|---|---|---|
| 2000s | 326.9 megawatts | 533.5 megawatts | 206.6 megawatts | Japan |
| 2010s | 678.61 megawatts | 507.32 megawatts | 171.29 megawatts | Iceland |
| 2020s | 772.11 megawatts | 466.08 megawatts | 306.03 megawatts | Iceland |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher installed geothermal energy capacity, Iceland or Japan?
- Iceland, at 787.58 megawatts against 468.91 megawatts in Japan as of 2025.
- What is the difference in installed geothermal energy capacity between Iceland and Japan?
- 318.67 megawatts, with Iceland ahead.
- How many years of comparable data are there for Iceland and Japan?
- 26 years are reported by both, from 2000 to 2025.
- How do Iceland and Japan rank globally for installed geothermal energy capacity?
- Iceland ranks 8th and Japan ranks 10th of 32 countries.
- Where does this data come from?
- IRENA (2026) β processed by Our World in Data, published as Installed geothermal energy capacity. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Total geothermal (on- and off-grid) electricity installed capacity, measured in megawatts.