| Facility | Type | Country | t CO₂e/yr |
|---|---|---|---|
| ENEOS Mizushima Refinery | Refinery | Japan | 2,996,525 |
| ENEOS Kawasaki Refinery | Refinery | Japan | 2,080,342 |
| ENEOS Kashima Refinery | Refinery | Japan | 1,640,471 |
| ENEOS Negishi Refinery | Refinery | Japan | 1,364,480 |
| ENEOS Sakai Refinery | Refinery | Japan | 1,206,482 |
| ENEOS Sendai Refinery | Refinery | Japan | 1,193,308 |
| OIREC Chiba Refinery | Refinery | Japan | 1,103,803 |
| ENEOS Oita Refinery | Refinery | Japan | 1,090,460 |
| ENEOS Tonen Chemcial, Kawasaki | Petrochemical | Japan | 690,330 |
| ENEOS Marifu Refinery | Refinery | Japan | 659,320 |
| ENEOS Petrochemical Kawasaki, Kawasaki | Petrochemical | Japan | 568,011 |
| ENEOS Wakayama Refinery | Refinery | Japan | — |
Ownership, capacity & CO₂: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).