Japan vs Portugal: Primary energy use by source
Japan
12.84 terawatt-hours
in 2025
Portugal
13.8 terawatt-hours
in 2025
Japan rank
24th
Portugal rank
22nd
Primary energy use by source over time
- Japan
- Portugal
How they compare
Portugal currently reports 13.8 terawatt-hours against 12.84 terawatt-hours in Japan, a difference of 0.96 terawatt-hours.
That makes Portugal's figure about 1.1 times Japan's.
The two have swapped places 2 times across 61 shared years of data; in 1965 it was Portugal ahead.
Japan ranks 24th and Portugal ranks 22nd of 79 countries.
Portugal has averaged higher in every one of the 7 decades both report.
Head to head by decade
| Decade | Japan | Portugal | Difference | Ahead |
|---|---|---|---|---|
| 1960s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 1970s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 1980s | 0 terawatt-hours | 0.0001 terawatt-hours | 0.0001 terawatt-hours | Portugal |
| 1990s | 0.0049 terawatt-hours | 0.032 terawatt-hours | 0.0271 terawatt-hours | Portugal |
| 2000s | 1.62 terawatt-hours | 2.42 terawatt-hours | 0.7964 terawatt-hours | Portugal |
| 2010s | 5.49 terawatt-hours | 11.53 terawatt-hours | 6.05 terawatt-hours | Portugal |
| 2020s | 10.2 terawatt-hours | 13.35 terawatt-hours | 3.15 terawatt-hours | Portugal |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher primary energy use by source, Japan or Portugal?
- Portugal, at 13.8 terawatt-hours against 12.84 terawatt-hours in Japan as of 2025.
- What is the difference in primary energy use by source between Japan and Portugal?
- 0.96 terawatt-hours, with Portugal ahead.
- How many years of comparable data are there for Japan and Portugal?
- 61 years are reported by both, from 1965 to 2025.
- How do Japan and Portugal rank globally for primary energy use by source?
- Japan ranks 24th and Portugal ranks 22nd of 79 countries.
- Where does this data come from?
- Energy Institute - Statistical Review of World Energy (2026); Smil (2017) – with major processing by Our World in Data, published as Primary energy use by source. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Measured in terawatt-hours of total energy supply.