Jefferies' analysis shows that capital spending on Japan's energy transition climbed 43% year-over-year in 2025, representing the strongest percentage growth among the major economies tracked. The rise contrasts with more modest increases in other regions and a decline in China.
On a comparative basis, the report places Japan's gain well ahead of the European Union's 18% increase and India's 15% rise, and far above the United States' 3% uptick. China diverged from those gains, recording a 4% year-over-year decline in energy transition investment for 2025.
Breaking down Japan's movement by category, Jefferies identifies clean industry investment as the largest contributor to the year-over-year increase, with an absolute lift of $7.5 billion from what had been a negligible base. Renewable energy investment rose by $3.2 billion versus the prior year, reaching $10.5 billion in total and representing roughly a 45% increase; renewables remained the single largest category by absolute spending.
Other segments showed marked gains. Nuclear investment increased by $1.4 billion year-over-year, an advance of 266%. Investment in electrified heat expanded by 12%, while energy storage spending climbed 37%.
Not all categories grew in 2025. Power grid investment fell by $1.8 billion, an 18% decline, and investment in electrified transport declined by $0.8 billion, down 17% compared with the prior year.
Aggregate investment in Japan amounted to approximately $40 billion in 2025. That total remains far smaller in absolute terms than investment levels in several other major economies, with China at about $800 billion, the United States at $380 billion and the EU-27 at $455 billion.
Jefferies notes that the 2025 expansion follows a year of flat investment in 2024.
Key data points from the report include:
- Overall year-over-year increase in Japan: 43% in 2025.
- Clean industry contribution: +$7.5 billion year-over-year from a negligible base.
- Renewable energy: +$3.2 billion to $10.5 billion (about +45%).
- Nuclear: +$1.4 billion year-over-year (+266%).
- Electrified heat: +12%; energy storage: +37%.
- Power grid: -$1.8 billion (-18%); electrified transport: -$0.8 billion (-17%).
- Total Japan investment in 2025: approximately $40 billion, versus China $800 billion, U.S. $380 billion, EU-27 $455 billion.
The figures provide a snapshot of where capital flowed within Japan's energy transition in 2025, highlighting both concentrated increases in certain clean sectors and notable declines in others.