| Facility | Type | Country | t CO₂e/yr |
|---|---|---|---|
| Nghi Son Refinery | Refinery | Vietnam | 2,275,643 |
| Idemitsu Kosan Yokkaichi Refinery | Refinery | Japan | 2,181,935 |
| Idemitsu Hokkaido Refinery | Refinery | Japan | 1,644,550 |
| Idemitsu Kosan Chiba Refinery | Refinery | Japan | 1,625,756 |
| Idemitsu Kosan Aichi Refinery | Refinery | Japan | 1,454,624 |
| Idemitsu Kosan Keihin Refinery | Refinery | Japan | 767,457 |
| Idemitsu Kosan Tokuyama Refinery | Refinery | Japan | 179,808 |
Ownership, capacity & CO₂: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).
