Updated August 2025
In fiscal 2020, the Denka Group declared its goal of becoming carbon neutral by fiscal 2050. As a milestone toward this goal, we are aiming to reduce CO 2 emissions by 50% (compared to fiscal 2013) by fiscal 2030.
In fiscal 2024, our annual emissions from the Company and Group companies totaled 1.77 million tons, achieving a 72% reduction compared to fiscal 2013, due to the transformation of our business portfolio, promotion of energy conservation, introduction of renewable energy (hydroelectric power), and reduction in production volume.
Going forward, we will continue and promote the following measures as initiatives toward achieving carbon neutrality.
| Transforming our portfolio | Through a transformation of our portfolio, including withdrawal from the cement business, we will reduce our CO 2 emissions. |
|---|---|
| Energy conservation | The Omi Plant (which began operation in October 2020) and Chiba Plant (which began operation in June 2022) have introduced high-efficiency gas turbine power generators. We will continue to promote thorough energy conservation at each of our business sites. |
| Further introduction of renewable energy | Currently, we have 17 hydroelectric power generation facilities (one of which started operation in FY2022). We are also promoting the introduction of solar power generation at several of our business sites to further expand our use of renewable energy. |
With an eye toward collaborations with local communities and surrounding companies, we are exploring and examining the possibility of recovering CO 2 and repurposing it as a chemical product. At the same time, we will also work on the introduction and development of environmental burden reduction processes aimed at reducing generated CO 2 emissions. By combining these technological developments with collaboration with external parties, we will steadily reduce the CO 2 emissions generated by our company.
Medium- to long-term targets for reduction of greenhouse gas emissions
The Denka Group is addressing the issues of reducing environmental burden, recycling waste plastics, and conserving biodiversity through its products and technologies in pursuit of fulfilling its social responsibilities as a chemical manufacturer.
The Company has commenced the commercialization of the chemical recycling of polystyrene resins in collaboration with our equity-method affiliate, TOYO STYRENE CO., LTD. We have introduced technology from Agilyx Corporation in the United States and decided to construct a plant (annual processing capacity: approximately 3,000 tons) at our Chiba Plant, with operations scheduled to commence in the latter half of fiscal 2023. Unlike conventional material recycling, this groundbreaking method has no restrictions on the applications of the regenerated polystyrene and can reduce CO 2 emissions by half compared to normal production methods. We will continue to promote these initiatives with the aim of achieving early full-scale implementation.
Denka recognizes that a certain period of time is required for collecting, organizing, and examining natural environmental information and making decisions. Therefore, we have started taking action from September 2022 with the aim of finding points of contact between our business activities and biodiversity and identifying priority issues, using the LEAP approach ※ recommended by the TNFD guidelines.
Specifically, we conducted surveys using public data and literature on the natural environment surrounding our seven domestic business sites. We then focused on our Omi Plant (located in Itoigawa City, Niigata Prefecture), which has 17 hydroelectric power plants in nearby mountains and the greatest points of contact with the natural environment, and began extracting and evaluating those points of contact. Based on this, we will analyze our risks and opportunities in relation to the natural environment and implement specific measures for biodiversity conservation. Furthermore, we will gradually expand the targets to other business sites, and while continuing the above activities in a cycle, aim to maintain and improve the natural environment from a long-term perspective.
Denka is working towards the development of environmentally conscious products in its quest for a sustainable future. Our environmentally friendly products play an important role in protecting the global environment and realizing a sustainable society. For details, please refer to the list of SDGs contribution products.
Click here for list of products that contribute to the SDGs
The Company has developed a carbonization admixture, “LEAF,” which utilizes industrial waste as a raw material, using the technology of special cement admixtures that we have cultivated over many years. “LEAF” has the characteristic of actively reacting with and fixing CO 2. By formulating this “LEAF” into an environmentally friendly concrete, “CO 2-SUICOM,” which was jointly developed by Kajima Corporation, Chugoku Electric Power Co., Inc., Randes Co., Ltd., and the Company, CO 2 is absorbed and fixed during the curing of the concrete, aiming for a net reduction of CO 2 emissions from the cement manufacturing process.
Our high thermal conductivity and high toughness ceramic substrate "SN Plate" has about 4 times the thermal conductivity of alumina and is a material based on high toughness silicon nitride (Si3N4) with excellent mechanical properties. By imparting high conductivity to the mechanical properties, it is used as a lightweight power module substrate for electric vehicles and electric railways, which require high reliability. We will contribute to the reduction of CO 2 emissions by supporting the electrification (xEV) of the automotive industry, which is expected to accelerate in the future, with our material technologies.
To maintain an environment in which society and ecosystems can continue to survive into the future, Denka Group aims to contribute to achieving the goals of the Paris Agreement, an international framework, and to achieve net-zero greenhouse gas emissions (carbon neutrality) by fiscal 2050. To achieve this, we are promoting energy conservation and expanding the use of renewable energy, primarily hydroelectric power, while also working to reduce CO 2 CCUS: Separating and capturing carbon dioxide from emission sources * We will also take on the challenge of introducing innovative technologies such as the use of hydrogen, a clean energy source. Furthermore, in order to reduce emissions at our own business sites and contribute to decarbonizing society as a whole, we will promote the development and provision of environmentally friendly products and technologies that reduce the environmental impact, and will strengthen our efforts to recycle resources by introducing new plastic recycling methods.
Consideration for the Global EnvironmentDenka is committed to global environmental preservation based on Responsible Care, an initiative promoted by the global chemical industry. As a responsible chemical manufacturer, Denka will continue to address the issues of global environmental preservation.
2050 Roadmap Efforts to Reduce Environmental Impact Efforts for Environmentally Conscious Products Environmental Accounting
Denka Group is committed to achieving its target of "net zero CO2 emissions" by 2050. To this end, we have set the interim target of reducing CO2 emissions by 60% from the fiscal year 2013 level by 2030.
Denka accurately understands the environmental burden substances emitted from the production facilities of Group companies and is working on their continuous reduction. The substances targeted include greenhouse gases such as CO2...
Greenhouse gas emissions Zero emissions initiatives Information disclosure initiatives Fluorocarbons...
Addressing Risks and OpportunitiesRegarding the risks and opportunities posed by climate change, we will conduct scenario analysis based on the following two temperature rise scenarios: 1.5°C or less (Glasgow Climate Pact) and 4°C (business-as-usual).
Expansion of renewable energy and introduction of environmentally friendly power generation technologies Certification of special measures for levies based on the Renewable Energy Special Measures Act ...
hydroelectric power plant (Map) *As of August 2025 / Including our joint venture company's power plant. Private power plant and maximum output (20...
Use of environmental energy-related subsidies In our efforts to reduce environmental impact and promote energy conservation, we actively utilize subsidy programs from the Ministry of Economy, Trade and Industry and the Ministry of the Environment, etc.
Our Approach to Biodiversity Initiatives for Biodiversity Participation in TNFD Forum ...
Issues of the Company Group Specific Initiatives Water Resource Data Water Risk Assessment ...
Approach to resource recycling (circular economy) Chemical recycling ISCC PLUS certification ...
Environmental conservation costs Environmental conservation effect Economic effect Environmental conservation costs ...
Data Scope: Total of 8 locations of Denka head office (80% of Denka product sales manufactured) *Final disposal amount (landfill treatment) for FY2024...
Greenhouse gas emissions Renewable energy Main environmental impact (Head office and domestic group companies) Water resources Envi...
2024 Fiscal Year Main Substances Emitted and Water Used Ratios Head Office, Branch Offices Omi Plant Chiba Plant ...