| Facility | Type | Country | t CO₂e/yr |
|---|---|---|---|
| Nippon East Japan Works (Kimitsu) steel plant | Steel Plant | Japan | 12,921,079 |
| Nippon Kyushu Works (Oita Area, Oita) steel plant | Steel Plant | Japan | 11,600,217 |
| Nippon East Japan Works (Kashima) steel plant | Steel Plant | Japan | 9,268,493 |
| Nippon Nagoya steel plant | Steel Plant | Japan | 6,948,397 |
| Nippon Kyushu Works (Yawata Area, Tobata) steel plant | Steel Plant | Japan | 4,653,899 |
| Nippon Kansai Works (Wakayama Area, Wakayama) steel plant | Steel Plant | Japan | 4,074,166 |
| Nippon Setouchi Works (Hirohata Area) steel plant | Steel Plant | Japan | 3,541,361 |
| North Nippon Muroran Works steel plant | Steel Plant | Japan | 2,191,669 |
| Nippon Setouchi Works (Kure Area) steel plant | Steel Plant | Japan | — |
Ownership, capacity & CO₂: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).
