Renewable Energy Institute today released the English summary of "Towards the Green Steel Market Formation: Issues and Conditions for the Use of the Mass Balance Method" (original Japanese full version published in July 2024). Decarbonizing the steel industry requires technological innovation, the development of new production infrastructure, and a base of decarbonized electricity and hydrogen supply as well as securing or increasing demand of the low-carbon products produced. However, at a time when low-carbon steel is not yet in production, attention is currently being turned to products using the 'mass balance method' as a transitional measure, where products are labeled as low-carbon by attaching certificates attributing the outcomes of internal reduction measures. Although steel companies and governments have positioned the role of 'mass balance products' as creating and leading a green market for steel products, the reality is that there are many challenges to overcome.