| # | Facility | BBL per day | t CO₂e/yr |
|---|---|---|---|
| 1 | ENEOS Mizushima Refinery | 350,200 | 2,996,525 |
| 2 | Idemitsu Kosan Yokkaichi Refinery | 255,000 | 2,181,935 |
| 3 | ENEOS Kawasaki Refinery | 249,100 | 2,080,342 |
| 4 | ENEOS Kashima Refinery | 203,100 | 1,640,471 |
| 5 | Idemitsu Kosan Chiba Refinery | 190,000 | 1,625,756 |
| 6 | Cosmo Oil Chiba Refinery | 177,000 | 1,940,569 |
| 7 | Idemitsu Kosan Aichi Refinery | 170,000 | 1,454,624 |
| 8 | ENEOS Negishi Refinery | 153,000 | 1,364,480 |
| 9 | Idemitsu Hokkaido Refinery | 150,000 | 1,644,550 |
| 10 | ENEOS Sendai Refinery | 145,000 | 1,193,308 |
| 11 | Fuji Oil Sodegaura Refinery | 143,000 | 736,584 |
| 12 | ENEOS Sakai Refinery | 141,000 | 1,206,482 |
| 13 | Taiyo Oil Shikoku Refinery | 138,000 | 1,069,669 |
| 14 | ENEOS Oita Refinery | 136,000 | 1,090,460 |
| 15 | OIREC Chiba Refinery | 129,000 | 1,103,803 |
| 16 | ENEOS Marifu Refinery | 128,000 | 659,320 |
| 17 | Idemitsu Kosan Tokuyama Refinery | 120,000 | 179,808 |
| 18 | Cosmo Oil Sakai Refinery | 100,000 | 855,661 |
| 19 | Cosmo Oil Yokkaichi Refinery | 86,000 | 655,429 |
| 20 | Idemitsu Kosan Keihin Refinery | 70,000 | 767,457 |
| 21 | ENEOS Wakayama Refinery | — | — |
Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).
