| Plant | Fuel | Country | MW | t CO₂/yr |
|---|---|---|---|---|
| Kashiwazaki Kariwa | Nuclear | Japan | 8,212 | — |
| Futtsu | Gas | Japan | 5,040 | — |
| Fukushima Daina | Nuclear | Japan | 4,400 | — |
| Hirono | Oil | Japan | 4,400 | — |
| Kashima | Oil | Japan | 4,400 | 3,224,900 |
| Anegasaki | Oil | Japan | 3,600 | — |
| Sodegaura | Gas | Japan | 3,600 | — |
| Yokohama | Oil | Japan | 3,325 | — |
| Chiba | Gas | Japan | 2,880 | 491,920 |
| Yokosuka | Oil | Japan | 2,274 | — |
| Higashi Ogishima | Gas | Japan | 2,000 | — |
| Hitachinaka power station | Coal | Japan | 2,000 | — |
| Goi | Gas | Japan | 1,886 | — |
| Kawasaki | Gas | Japan | 1,500 | — |
| Shin Takasegawa | Hydro | Japan | 1,280 | — |
| Tamahara | Hydro | Japan | 1,200 | — |
| Minami Yokohama | Gas | Japan | 1,150 | — |
| Shinagawa | Gas | Japan | 1,140 | — |
| Imaichi | Hydro | Japan | 1,050 | — |
| Ohi | Oil | Japan | 1,050 | — |
| Shiobara | Hydro | Japan | 900 | — |
| Kazunogawa | Hydro | Japan | 800 | — |
| Azumi | Hydro | Japan | 623 | — |
| Kannagawa | Hydro | Japan | 470 | — |
| Midono | Hydro | Japan | 245 | — |
| Yagisawa | Hydro | Japan | 240 | — |
| Shinanogawa | Hydro | Japan | 177 | — |
| Hachijojima | Geothermal | Japan | 3 | — |
Ownership & capacity: WRI Global Power Plant Database (CC BY 4.0). Measured CO₂ where reported to EPA/EU ETS/Climate TRACE.
