This report provides an easily understandable and comprehensive overview of the Mitsubishi Materials Group's ("the Group") approaches, initiatives, results, issues, and current direction with regard to sustainable management for stakeholders and other interested parties. It is also intended to elicit opinions and help us continuously improve the standard of our activities. This report is produced by referencing the Global Reporting Initiative (GRI) “GRI Standards,” the international standard for sustainability reporting. From the fiscal year ended March 2021, this report is published only on the website and electronically (PDF).

Qualitative data: Including Group companies, with Mitsubishi Materials Corporation playing a central role.
Quantitative data: Data on Group companies is as follows.
 

• Greenhouse gas emissions include 85 consolidated subsidiaries for Scope 1 and Scope 2 emissions and 48 major consolidated subsidiaries for Scope 3 emissions.
• Other environmental data is for major 48 consolidated subsidiaries with manufacturing facilities
• Compliance training data refers to the main companies subject to Compliance/Risk management activities (80 companies)
• Safety data relates to the 29 major consolidated subsidiaries
• Social contribution activities results covering 88 consolidated subsidiaries

Apart from the above, figures relate to Mitsubishi Materials on a non-consolidated basis

From the fiscal year ended March 2025, the following have been partially excluded from consolidation.

• Tohsoh Corporation (Business terminated on June 28, 2024)
• New Energy Fujimino Co., Ltd., (Business terminated on September 30, 2024)
• PT. Smelting (Transferred to an equity-method affiliate on July 30, 2024)

In addition, the following have been added to consolidation.
 

• H.C. Starck Holding（Germany）GmbH and 12 other companies (Acquired all shares on December 17, 2024)
• Dawson Shanahan Ltd.（Acquired all shares on May 3, 2024）

September 2025 (previous：August 2024)

• Global Reporting Initiative (GRI) “GRI Standards” (In accordance with)
• GRI Sustainability Reporting Guidelines Sector Disclosures (Mining and Metals)
• Task Force on Climate-related Financial Disclosures Recommendations
• Taskforce on Nature-related Financial Disclosures

We systematically disclose information on the Group, mainly via the following reporting tools.

We place great importance on the process of compiling this report. The process is designed with the aim of improving transparency and reliability as a company, in the interests of accountability (with regard to external parties), and tying in with promoting the Group's sustainable management.
 

• Improving Transparency and Reliability
  Having examined and identified eleven “material issues” from two axes according to their importance to various stakeholders and their importance in light of Our Commitment, they provide the basic framework for both our Sustainability activities and its reports. As the environment is constantly changing around us, not least in terms of stakeholder trends, we review our material issues on a regular basis. We also keep a close eye on matters of interest to our stakeholders, their expectations and business conditions, so that we can check and adjust the contents of our reports in precise detail. To keep track of matters of interest to our stakeholders, their expectations and other related trends, we gather information from individual departments, based on sources such as questionnaires from ESG investors, responses to reader questionnaires, and intensive internal interviews prior to the compilation of the current report. We hold Stakeholder Meetings to discuss topics of particular importance. Meetings also help to establish a clear understanding of social issues, from various different angles, and to examine details of Group initiatives.
  We also obtain an “independent assurance,” to assist in comprehensively evaluating the contents of our reported figures against international requirements in an effort to improve transparency and reliability.
   
• Promoting Sustainability Activities Based on Communication
  We make the most of communication activities, as part of the process of compiling this report, to improve our ability to promote sustainability activities, by establishing a shared understanding and raising awareness of changes in the external environment for example. We conduct hearings with the relevant head office and corporate division as needed, and not only coordinate the reporting, but also exchange opinions and share information about matters of interest or concern to stakeholders, issues for the future, and the direction of our activities. Asking relevant departments to produce articles for this report, and then exchanging opinions regarding the draft report once it has been compiled, enables departments to review their sustainability activities from an external perspective and helps to develop a shared understanding of their strategic significance.