Fujitsu blockchain experiment maps green steel supply chain value flow

Fujitsu has announced that it commenced a demonstration experiment into the value flow of green steel in the steel industry starting in December 2025. The project was previously selected by Japan’s Ministry of Economy, Trade and Industry (METI) as part of its FY2025 Industrial Research Project under the theme ‘Survey Project on the Transmission of Green Steel Information Linked to Steel Materials Across Supply Chains in November 2025’.

Fujitsu says the demonstration experiment will leverage the company’s expertise in CO₂ emission reduction materials, blockchain technology and data distribution platforms to ensure that data can be distributed safely and that the environmental value of green steel and transaction confidentiality can be secured. The experiment is being carried out from December 2025 to February 2026, and through this initiative Fujitsu seeks to accelerate decarbonisation across the manufacturing sector, beginning with the steel industry, and contribute to the establishment of a sustainable supply chain.

Reducing CO₂ emissions related to the steel industry is an urgent challenge for society. While industry organisations produce and supply green steel using GX Mass Balance¹ and GX Allocation² methods in accordance with established guidelines, there is a challenge in adequately distributing its environmental value throughout the downstream supply chain.

The initiative aims to examine mechanisms for ensuring that environmental value — such as emissions reduction steel certificates issued by steel manufacturers through green steel production — flows through the supply chain from upstream to downstream without being duplicated or compromised. It also seeks to identify challenges in current business practices and operational issues for each business operator when such mechanisms are applied.

_{1. The GX Mass Balance Method utilises the ‘mass balance model’ defined in ISO 22095:2020 to pool greenhouse gas (GHG) emission reductions from additional projects undertaken by a company within its organisation, and then allocates these to specific products, supplying them along with reduction certificates (from The Japan Iron and Steel Federation GX Steel Guidelines).}

_{2. The GX Allocation Method is an approach based on ‘allocation’ in ISO 14067:2018 and ISO 14044:2006, where GHG total emissions (emission intensity x production volume) are kept constant, and emission reductions are allocated to products (GX steel/non-GX steel) to reflect the relationship between high and low GX value, within the scope of GHG emission reductions (from The Japan Iron and Steel Federation GX Steel Guidelines).}

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