In order to deliver safe, high-quality products to customers as a manufacturer, we ensure product quality and safety based on a precautionary approach, in addition to complying with laws and regulations. We have also formulated a set of regulations for the control of hazardous chemical substances contained in our products. As well as thoroughly ensuring that we do not release any products containing hazardous substances to customers, including via Group companies, we are committed to disclosing product information as necessary.

We make every effort to ensure safety when transporting products that require special precautions during transit, such as sulfuric acid.
Specific measures include ① avoiding contact with other substances, ② wearing protective equipment when filling and unloading products, ③ taking measures to prevent leaks or dispersal from containers, and ④ providing drivers with Safety Data Sheets (SDS) that clearly outline procedures to follow in the event of an accident

Providing safety information on our own products is vitally important, to ensure product safety further along the supply chain. We therefore attach Safety Data Sheet (SDS) to Mitsubishi Materials products so as to effectively disclose and convey information on chemical substances.

We carry out reviews during four key stages of the R&D process, when exploring areas of R&D, conducting R&D and prototyping, conducting mass production trials, and commercializing products. While continually taking safety in our processes and products into account, we implement checks and careful examination regarding the use of hazardous chemical substances, compatibility with customer requirements and compliance status with various laws and regulations. 

The Group had declared November 1 of each year to be our Group-wide Quality Review Day so that the quality issues that occurred in 2017 will not be forgotten and the same issue will not occur again. In the fiscal year ended March 2025, this was an opportunity to review quality issues by watching a video message from the CEO and a video of lessons learned from the series of quality issues. It is also an opportunity to once again verify that the products and services provided to customers at each site do not have quality issues. We have also implemented various initiatives, including the verification of the effectiveness of the measures for preventing the recurrence of complaints, and a review of the standards and procedures.

We operate in accordance with the "Fundamental Quality Provisions at Mitsubishi Materials Group" in order to enhance governance relating to quality. Under the quality provisions, we have formulated a Group-wide "Quality Policy" that aims to provide first-class products and to obtain customer satisfaction, and established and operate the "Quality Control Guidelines at Mitsubishi Materials Group" to complement the Group Quality Policy. We have established and are working to maintain our quality management, from design and development to production, shipping and sales, for the processes involved in quality improvement of products and services provided by us.
The Group handles a wide variety of products at its domestic and overseas sites, and it is important to share the latest information related to quality management. 
For this purpose, we hold quality officers meeting regularly attended by parties involved in the Group's quality management. The objectives of these meetings are as follows.
 

(1)  Sharing of various up-to-date information on the Group's quality, which is transmitted from the Safety, Environment and Quality Dept.
(2) Sharing of examples of improvements at each site and group discussions on themes to promote understanding among participants.
(3) Promotion of improvements at each site based on the shared information.
 

We have also set up a Quality Liaison Conference comprised of the persons in charge of quality from Safety, Environment & Quality Dept., each in-house Company, and others, in our efforts to enhance our governance system. At the Quality Liaison Conference, the progress and status of quality initiatives at each in-house Company, including Group companies, are reported. The necessary information is then shared by participants.
Further, where necessary, Safety, Environment & Quality Dept. and the Company holds  quality meetings that are aimed at sharing quality information. At quality meetings, we provide detailed support to each site, such as checking the status of quality management with each site individually and exchanging views. Quality audits are conducted as part of themed audits led by the Internal Audit Dept. The purpose of the quality audit is to confirm the lack of quality fraud and the implementation of effective quality initiatives based on objective evidence. It also aims to identify issues and improvements related to quality, and to provide an opportunity for the audited sites to make continuous improvements.
We have established a database of quality issues that have occurred in the Group , which we use to look back on past quality issues and to prevent similar events from recurring.

Total of 9 overseas manufacturing sites in Europe, the US and Asia of our Metalworking Solutions Company produce high-quality products in cooperation with the domestic sites. To standardize quality levels worldwide, the domestic sites provide continuous technical advice to the overseas manufacturing sites on equipment maintenance, production technology, and the development of quality documentation. As a result of multi-year efforts, local employees now lead improvement meetings and quality control reviews, and their motivation to learn new skills is a driving force for quality improvement.
Also, the Electronic Materials & Components business, a part of Advanced Products Company, has six manufacturing sites (including subsidiaries and partners) in Southeast Asia and has established a production and quality control system in close cooperation with locations (Ceramics Plants, GOTOH MFG Co., Ltd.) in Japan. The Copper & Copper Alloy business has a total of 12 sites in Europe, the United States, South America and Asia, and is working to maintain and improve the level of quality management by strengthening coordination with Japanese sites and head office. To reduce customer complaints about product quality and maintain governance, we encourage the sharing of information and conduct a wide range of activities aimed at further raising awareness and improving the skills of local staff and personnel posted overseas, including quality supervisor meetings, small group activities and presentation meetings, quality audits conducted by the in-house Company, and web conferences held on a timely basis.

Given the reflection that crisis sharing within the Group was not working and a poor sense of ownership was seen when the quality issues occurred, quality training is conducted for each level of younger employees, middle employees and managers, to continue to change their mindset on quality. The quality management system (QMS) based on ISO9001 is fundamental to our quality management and quality assurance. ISO9001 internal auditor training is conducted regularly for newly appointed auditors. In the fiscal year ended March 2025, twelve classes were held with a total of 103 participants. Furthermore, we also held six classes aimed at maintaining and improving the auditing skill and capabilities for the experienced internal auditors. A total of 29 people participated in these classes.

As a result of the Group’s efforts to implement and strengthen prevention measures for recurrence in quality management, we have improved both quality awareness and control level across the Group and various measures have been disseminated across the Group. To prevent the recurrence of quality issues going forward, we will incorporate a series of measures to prevent quality issues into our quality management systems such as the systems that comply with the ISO9001 standard, and continuously implement them.

Currently, as part of our "proactive quality management" efforts, we are also working to realize designs, facilities, and processes that prevent the occurrence of out-of-specification products. Each Company and base sets quality targets and promotes various improvement activities to achieve them.
Currently, as part of our "proactive quality management" efforts, we are also working to realize designs, facilities, and processes that prevent the occurrence of out-of-specification products. Each Company and base formulates activity plans and promotes various improvement activities to achieve them.
Since quality is the brand asset of our Group, we will continuously improve the level of quality through quality education and quality improvement activities, and continue to provide products that satisfy our customers.

As a part of our quality management activities, we analyze complaints and conduct customer satisfaction surveys at all Mitsubishi Materials business sites and Group companies in order to reflect the diverse demands of our customers. The results of analyses and customer feedback obtained from surveys are reported to management reviews, taken seriously and reflected in improvements to provide 'better products and services'.

By taking advantage of the Mitsubishi Process for continuous copper smelting, a unique copper smelting technology that has achieved the industry's top environmental impact reduction, we have long accepted and processed E-Scrap and currently boast the world's number one E-Scrap acceptance and processing capacity of approximately 160,000 tons annually. To respond to the growing E-Scrap market and higher recycling rates, we aim to expand our annual E-Scrap acceptance and processing capacity to 240,000 tons by 2030. Against this background, we began operating the new MEX (Mitsubishi Materials E-Scrap EXchange) platform for E-Scrap trading, on December 20, 2021, to further improve our customer services. MEX uses the latest digital technologies and includes a large number of features, which are being steadily expanded to meet customer needs. We aim to be an accessible partner for all customers in Japan and overseas by offering our long-standing experience and high technological capabilities through MEX.
In the recycling and resource circulation sector, the Company carries out recycling treatment of waste products, etc. and devises ways to accumulate improvements in the recycling process, including methods for recovering raw materials, so that recycled resources (copper, iron, resins, etc.) can be systematically supplied in grades and quantities that meet the needs of customers. In addition, each recycling plant actively conducts plant tours for customers in order to provide opportunities for environmental education as part of its social contribution activities.

We deliver advanced products that are essential for customers, leveraging our manufacturing technologies like oxygen-free copper, high-performance copper alloys, and silicon products, as well as process technologies like bonding different materials.
By sharing the future product road map with customers to identify the functional value they demand promptly, we will be a good partner of our customers as their first call vendor.

We are contributing to the creation of a recycling-oriented society through the business of recycling mineral resources and the development of renewable energy. In the renewable energy sector, we are actively engaged in the maintenance and management of facilities on a daily basis to ensure the stable supply of environmentally friendly energy over the long term, aiming to contribute to the creation of a decarbonized society through the provision of renewable energy. Furthermore, we strive to provide new value derived from "renewable sources" by supplying electricity to local new power initiatives based on the concept of "local production and consumption of energy" and participating in auctions for non-fossil fuel certificates. Through these efforts, we aim to meet the trust of our customers and the community.