Combating Global Warming

To help prevent global warming, the SUMCO Group identifies both external and internal challenges to preventing climate change based on the Company's business goals/Environmental Policies and the needs and expectations of related stakeholders. In this way, the Group determines risks and opportunities related to these external/internal issues and needs/expectations.
Based on these, we resolve and implement year-long initiatives targeting climate change issues that take into account the risks and opportunities for each department, report the results to Environmental Management Officer, evaluate and analyze the results at meetings of the Environmental Management Committee, and as necessary, revise these risks and opportunities.
To look at a specific example: For the production of silicon wafer, the SUMCO Group makes every effort to streamline production and promote rationalization in order to reduce electric power consumption. In addition, each plant reduces electric power consumption by installing energy-saving and high-efficiency equipment when renewing production and utility facilities, by switching to LED lighting equipment, and other measures.
In Japan, the SUMCO Group also has registered with the Environmental Reporting Platform Development Pilot Project of the Ministry of the Environment. This undertaking encourages the disclosure of environmental information and dialog among parties including companies and investors. It is contributing toward the creation of a sustainable society by helping to ensure that companies actively engaged in environmental activities are properly recognized for their efforts and gain investor funding support as a result.
In 2024, major investment in GHG reduction totaled 778 million yen.

• *Data of High-Purity Silicon Corporation and High-Purity Silicon America Corporation has been incorporated since 2024.

Unit energy usage goal (SUMCO Group / domestic)

We set an unit energy usage goal in 2019 (to be reviewed in 2024). The GHG emissions related to the unit consumption calculation are the actual emissions of Scope1+2 (no carbon offset) and we shall strive to reduce GHG emissions by reducing energy consumption and improving energy efficiency in our corporate activities.

Target Year	2030
Goal	6.8% reduction from 2023 (1.0% reduction per year) (GHG emission in 2023: 975,000 tons-CO2e)
Initiatives	Continuous energy-conservation activities

Efforts to Introduce Renewable Energy

Investment in Clean Technologies (such as Solar Power Generation, etc.)

We have installed solar power generation equipment at our Kyushu Factory (Imari, Kubara) and at High-Purity Silicon Corporation (Yokkaichi), and we use and sell renewable energy. The total power generation capacity is 2.36 MW. Upon replacing production or utility equipment, we also adopt energy-saving or high-efficiency equipment and aim to curtail energy consumption through LED lighting.

Procurement of Non-Fossil Electricity (such as J-Credit and Non-Fossil Certificates, etc.)

The SUMCO Group（domestic） has started introducing procurement of non-fossil electricity to achieve its carbon neutrality targets. With this introduction, the Group's procurement of non-fossil electricity input in CY2024 will be 213 GWh, which is expected to contribute to a reduction of approximately 90,061 t-CO₂e/year.

SUMCO Group Renewable Energy Introduction Results (SUMCO Group / domestic)

	Unit	Last year (2024)
Amount of renewable electricity	GWh	213
Total electricity consumption		1,812
Renewable energy ratio	%	11.8
(Ratio of renewable electricity)

Internal carbon pricing（ICP）system

The SUMCO Group has introduced an Internal Carbon Pricing (ICP) system from January 2022 in order to achieve both reduction of GHG emissions and business growth. We will convert GHG emissions into costs and use them as one of the judgment criteria for environmental investment to promote the reduction of GHG emissions and energy conservation.

CO₂ Reduction through Modal Shift to Ship Transport in the Field of Logistics

CO₂ Reduction through Modal Shift to Ship Transport

SUMCO used to rely solely on airfreight for the transportation of silicon wafers to overseas markets. However, to reduce both CO₂ emissions and transportation costs, we have been promoting a modal shift to ship transport for some of our products since 2009, taking into account factors affected by longer transportation lead time and changes in the transportation environment. We conduct tests before switching to ship transport to confirm that the quality of products is not affected, as well as consulting with customers.

Climate Initiative

SUMCO has endorsed the Japan Climate Initiative (JCI) declaration to "join the global frontline for decarbonization from Japan" and has been participating since April 2023.
JCI is a network of companies, local governments, NGOs, and other organizations in Japan that are actively working to combat climate change.

• Click here for Japan Climate Initiative (JCI)

SBT (Scienced Based Targets)

The SUMCO Group obtained Science Based Targets (SBT)^*1 certification for its Near-Term goals on June 12, 2025, from the SBT Initiative^*2, an organization that certifies SBT, the GHG^*3 emission reduction targets set by the Paris Agreement.
Going forward, we will formulate a reduction plan for Scope 3 in addition to Scope 1 & 2, and actively encourage our suppliers to reduce GHG emissions.

• *1 Science-Based Targets (SBT)
  This is a GHG emission reduction target that is consistent with the level required by the Paris Agreement, and is set for the next 5 to 10 years.
• *2 SBT Initiative (SBTi)
  A joint initiative by CDP, World Resources Institute (WRI), UN Global Compact, and World Wide Fund for Nature (WWF). An organization that defines and promotes science-based best practices for setting GHG emissions reduction targets and independently evaluates corporate targets.
• *3 GHG
  Greenhouse Gas

• To ESG-oriented Investors