Great expansion, greater responsibility: Nippon Steel Corporate Climate Assessment 2026 update
Nippon Steel’s global ambition is fundamentally reshaping the company. Its acquisition of U. S. Steel marks one of the most significant corporate transformations in the global steel industry in decades. This is not only an expansion of operations, but a significant enlargement of the company’s responsibility to protect communities and the global climate.
Disappointingly, Nippon Steel has already failed its first test. While substantial capital is yet to be allocated, its first act for wholly owned subsidiary U. S. Steel was to invest in relining a coal-based blast furnace. More critical decisions lay ahead, but committing to continued fossil fuel use while ignoring the well-documented health, climate and environmental damage that comes with it, sets an undignified precedent.
That said, the company is not lacking potential for positive change. In Japan, Nippon Steel has announced additional investments in increasing electric arc furnace (EAF) capacity, aiming to “establish production sites that will lead the world in the carbon neutral era.”1 The company has also begun to reference procurement of direct reduced iron (DR iron) more openly as part of its future decarbonisation pathway. Most recently, in the US it announced construction of a new direct reduction of iron ore (DRI) facility at its Big River plant in Arkansas, indicating a potential shift in its approach.
However, these efforts remain limited in scale and pale in comparison to the continued dominance of coal-based blast furnace production in the company’s growing global fleet. This imbalance is detailed in the SteelWatch Corporate Scorecard, released in March 2026, in which Nippon Steel ranks near the bottom among major global steelmakers, ranking 17th out of 18 companies.
The major challenge for Nippon Steel is responsibly aligning its expanding global footprint with the necessary targets and actions that reflect the urgency of the climate crisis.
This report outlines key developments in 2025, assesses the company’s emissions profile, and examines the technological investments and policy frameworks that underpin its decarbonisation strategy, while surfacing the challenges with its climate strategy.
These analyses show a clear conclusion: as Nippon Steel expands globally, its climate strategy is not keeping pace with its climate responsibilities. The company is also unprepared to meaningfully engage with impacted communities, because that would mean a fundamental rethinking of its coal-based business model.
The pathway forward is clear: a plan to phase out coal-based asset before their end of life, combined with an early and large-scale shift to near-zero-emissions4 ironmaking is essential. This must be underpinned by a socially just transition strategy that protects workers and communities and is consistent across both domestic and global operations.
