Iran vs Japan: Annual change in primary energy from hydropower
Iran
-6.92 terawatt-hours
in 2025
Japan
-5.23 terawatt-hours
in 2025
Iran rank
73rd
Japan rank
70th
Annual change in primary energy from hydropower over time
- Iran
- Japan
How they compare
Japan currently reports -5.23 terawatt-hours against -6.92 terawatt-hours in Iran, a difference of 1.69 terawatt-hours.
The two have swapped places 40 times across 60 shared years of data; in 1966 it was Japan ahead.
Iran ranks 73rd and Japan ranks 70th of 80 countries.
Across the 7 decades both report, Iran averaged higher in 4 and Japan in 3.
Head to head by decade
| Decade | Iran | Japan | Difference | Ahead |
|---|---|---|---|---|
| 1960s | 0.1458 terawatt-hours | -0.18 terawatt-hours | 0.3258 terawatt-hours | Iran |
| 1970s | 0.308 terawatt-hours | 0.5393 terawatt-hours | 0.2313 terawatt-hours | Japan |
| 1980s | 0.1349 terawatt-hours | 1.1 terawatt-hours | 0.9649 terawatt-hours | Japan |
| 1990s | -0.1589 terawatt-hours | -0.7949 terawatt-hours | 0.636 terawatt-hours | Iran |
| 2000s | 0.158 terawatt-hours | -1.33 terawatt-hours | 1.49 terawatt-hours | Iran |
| 2010s | 2.71 terawatt-hours | 0.3453 terawatt-hours | 2.37 terawatt-hours | Iran |
| 2020s | -3.65 terawatt-hours | 0.0556 terawatt-hours | 3.71 terawatt-hours | Japan |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher annual change in primary energy from hydropower, Iran or Japan?
- Japan, at -5.23 terawatt-hours against -6.92 terawatt-hours in Iran as of 2025.
- What is the difference in annual change in primary energy from hydropower between Iran and Japan?
- 1.69 terawatt-hours, with Japan ahead.
- How many years of comparable data are there for Iran and Japan?
- 60 years are reported by both, from 1966 to 2025.
- How do Iran and Japan rank globally for annual change in primary energy from hydropower?
- Iran ranks 73rd and Japan ranks 70th of 80 countries.
- Where does this data come from?
- Energy Institute – Statistical Review of World Energy (2026) – with major processing by Our World in Data, published as Annual change in primary energy from hydropower. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Change in total energy supply relative to the previous year, measured in terawatt-hours.