Italy vs Japan: Annual change in primary energy from solar
Italy
10.39 terawatt-hours
in 2025
Japan
14 terawatt-hours
in 2025
Italy rank
9th
Japan rank
7th
Annual change in primary energy from solar over time
- Italy
- Japan
How they compare
Japan currently reports 14 terawatt-hours against 10.39 terawatt-hours in Italy, a difference of 3.61 terawatt-hours.
That makes Japan's figure about 1.3 times Italy's.
The two have swapped places 6 times across 60 shared years of data; in 1966 it was Japan ahead.
Italy ranks 9th and Japan ranks 7th of 77 countries.
Across the 7 decades both report, Italy averaged higher in 1 and Japan in 4.
Head to head by decade
| Decade | Italy | Japan | Difference | Ahead |
|---|---|---|---|---|
| 1960s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 1970s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 1980s | 0.0002 terawatt-hours | 0 terawatt-hours | 0.0002 terawatt-hours | Italy |
| 1990s | 0.0015 terawatt-hours | 0.0218 terawatt-hours | 0.0203 terawatt-hours | Japan |
| 2000s | 0.066 terawatt-hours | 0.2827 terawatt-hours | 0.2167 terawatt-hours | Japan |
| 2010s | 2.3 terawatt-hours | 6.43 terawatt-hours | 4.13 terawatt-hours | Japan |
| 2020s | 3.81 terawatt-hours | 7.24 terawatt-hours | 3.43 terawatt-hours | Japan |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher annual change in primary energy from solar, Italy or Japan?
- Japan, at 14 terawatt-hours against 10.39 terawatt-hours in Italy as of 2025.
- What is the difference in annual change in primary energy from solar between Italy and Japan?
- 3.61 terawatt-hours, with Japan ahead.
- How many years of comparable data are there for Italy and Japan?
- 60 years are reported by both, from 1966 to 2025.
- How do Italy and Japan rank globally for annual change in primary energy from solar?
- Italy ranks 9th and Japan ranks 7th of 77 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 Annual change in primary energy from solar. 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.