Japan vs South Africa: Annual percentage change in primary energy from nuclear
Japan
10.8%
in 2025
South Africa
30.9%
in 2025
Japan rank
4th
South Africa rank
1st
Annual percentage change in primary energy from nuclear over time
- Japan
- South Africa
How they compare
South Africa currently reports 30.9% against 10.8% in Japan, a difference of 20.1%.
That makes South Africa's figure about 2.9 times Japan's.
The two have swapped places 20 times across 40 shared years of data; in 1985 it was South Africa ahead.
Japan ranks 4th and South Africa ranks 1st of 36 countries.
Across the 5 decades both report, Japan averaged higher in 3 and South Africa in 2.
Head to head by decade
| Decade | Japan | South Africa | Difference | Ahead |
|---|---|---|---|---|
| 1980s | 7.1% | 29.4% | 22.3% | South Africa |
| 1990s | 5.6% | 2.8% | 2.8% | Japan |
| 2000s | -0.6% | 0.6% | 1.2% | South Africa |
| 2010s | 23.6% | 3.6% | 20.0% | Japan |
| 2020s | 10.4% | -3.2% | 13.6% | Japan |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher annual percentage change in primary energy from nuclear, Japan or South Africa?
- South Africa, at 30.9% against 10.8% in Japan as of 2025.
- What is the difference in annual percentage change in primary energy from nuclear between Japan and South Africa?
- 20.1%, with South Africa ahead.
- How many years of comparable data are there for Japan and South Africa?
- 40 years are reported by both, from 1985 to 2025.
- How do Japan and South Africa rank globally for annual percentage change in primary energy from nuclear?
- Japan ranks 4th and South Africa ranks 1st of 36 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 percentage change in primary energy from nuclear. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Percentage change in total energy supply relative to the previous year.