Japan vs Romania: Annual change in primary energy from hydropower
Japan
-5.23 terawatt-hours
in 2025
Romania
-2.06 terawatt-hours
in 2025
Japan rank
70th
Romania rank
68th
Annual change in primary energy from hydropower over time
- Japan
- Romania
How they compare
Romania currently reports -2.06 terawatt-hours against -5.23 terawatt-hours in Japan, a difference of 3.17 terawatt-hours.
The two have swapped places 41 times across 60 shared years of data; in 1966 it was Japan ahead.
Japan ranks 70th and Romania ranks 68th of 80 countries.
Across the 7 decades both report, Japan averaged higher in 3 and Romania in 4.
Head to head by decade
| Decade | Japan | Romania | Difference | Ahead |
|---|---|---|---|---|
| 1960s | -0.18 terawatt-hours | 0.303 terawatt-hours | 0.483 terawatt-hours | Romania |
| 1970s | 0.5393 terawatt-hours | 0.9122 terawatt-hours | 0.3729 terawatt-hours | Romania |
| 1980s | 1.1 terawatt-hours | 0.2339 terawatt-hours | 0.8659 terawatt-hours | Japan |
| 1990s | -0.7949 terawatt-hours | 0.4612 terawatt-hours | 1.26 terawatt-hours | Romania |
| 2000s | -1.33 terawatt-hours | -0.2756 terawatt-hours | 1.06 terawatt-hours | Romania |
| 2010s | 0.3453 terawatt-hours | 0.0047 terawatt-hours | 0.3406 terawatt-hours | Japan |
| 2020s | 0.0556 terawatt-hours | -0.5747 terawatt-hours | 0.6303 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, Japan or Romania?
- Romania, at -2.06 terawatt-hours against -5.23 terawatt-hours in Japan as of 2025.
- What is the difference in annual change in primary energy from hydropower between Japan and Romania?
- 3.17 terawatt-hours, with Romania ahead.
- How many years of comparable data are there for Japan and Romania?
- 60 years are reported by both, from 1966 to 2025.
- How do Japan and Romania rank globally for annual change in primary energy from hydropower?
- Japan ranks 70th and Romania ranks 68th 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.