| # | Plant | Fuel | Country | MW |
|---|---|---|---|---|
| 1 | Kashima | Oil | Japan | 4,400 |
| 2 | Hitachinaka power station | Coal | Japan | 2,000 |
| 3 | Nakoso power station | Coal | Japan | 1,975 |
| 4 | Tokai Daini | Nuclear | Japan | 1,100 |
| 5 | Kashima Kyodo | Gas | Japan | 1,000 |
| 6 | Kashima Kita | Oil | Japan | 650 |
| 7 | Sumitomo Metals Kashima power station | Coal | Japan | 522 |
| 8 | Ibaraki power plant | Gas | Japan | 219 |
| 9 | Rinkai power station | Gas | Japan | 181 |
| 10 | Kamisu power station | Coal | Japan | 112 |
| 11 | Obayashi Kamisu power station | Biomass | Japan | 52 |
| 12 | Summit Onahama power station | Coal | Japan | 50 |
| 13 | Kamisu Biomass power generation project | Biomass | Japan | 50 |
| 14 | Kureha Iwaki Factory power station | Coal | Japan | 45 |
| 15 | Kanto Mill power station | Biomass | Japan | 43 |
| 16 | Mito Solar Power Plant | Solar | Japan | 39 |
| 17 | Mito Equis | Solar | Japan | 36 |
| 18 | Fukuroda Solar Power Plant | Solar | Japan | 32 |
| 19 | Tsuchiura | Solar | Japan | 23 |
| 20 | Inashiki Sakura | Solar | Japan | 17 |
| 21 | Suigo Itako Solar Power Plant | Solar | Japan | 14 |
| 22 | Mito Haru | Solar | Japan | 9 |
| 23 | Isatsu | Solar | Japan | 6 |
| 24 | Shinji | Solar | Japan | 6 |
| 25 | Jingūji B | Solar | Japan | 4 |
| 26 | Miho A | Solar | Japan | 4 |
| 27 | Edosaki A | Solar | Japan | 4 |
| 28 | Obatake A | Solar | Japan | 4 |
Method: ranked from open data — capacity & fuel from WRI Global Power Plant Database (CC BY 4.0); CO₂ measured for US EPA GHGRP / EU ETS records and modelled for Climate TRACE records. Sorted server-side; click any column to re-sort. Company-level data only.
Kashima (Japan) ranks #1 with 4,400 mw.
This ranking covers 28 power plants in in Ibaraki, Japan.
1. Kashima (4,400); 2. Hitachinaka power station (2,000); 3. Nakoso power station (1,975).