Greenhouse gas emissions

Our company aims to achieve carbon neutrality by 2050 for CO ₂ emissions from our own corporate activities (Scope 1 and 2) that can be directly reduced. In addition, we have established emission reduction targets for 2030 in our Mission 2030, and set annual targets as a roadmap. Furthermore, we will work to reduce the environmental impact of raw fuels and production processes, and promote energy conservation and the use of renewable energy. To promote decarbonization, there are limits to what can be done by individual companies. Therefore, in addition to our own efforts, we are actively seeking to work with groups of companies in the surrounding area and local governments to develop social infrastructure.

In the future, we will continue to work on reducing Scope 3 emissions through cooperation with upstream and downstream partners and the development and provision of environmentally conscious products and technologies for reducing environmental footprint based on our unique technologies.

Efforts toward zero emissions

Our company continues its efforts toward achieving zero emissions ^※ by utilizing industrial waste as a substitute for raw materials and thermal energy in cement kilns and reducing waste emissions through various production process improvements.

• ※Definition of zero emissions: (Waste landfill volume ÷ Total waste generated) < 1% Target: Domestic sites including affiliated companies

Efforts for Information Disclosure

Amid growing attention to ESG investment that emphasizes corporate social responsibility, the importance of environmental information disclosure is increasing. The Denka Group is actively working on information disclosure regarding environmental burden reduction measures through financial reports and public disclosure to external frameworks.
Since 2015, the Denka Group has been responding to CDP's Climate Change Questionnaire to enhance environmental management aimed at promoting the sustainable use of resources and energy and increasing corporate value. From 2019, we have also expanded our response to include Water Security. Furthermore, we are objectively analyzing our responses to CDP, and conducting governance related to environmental management and examining and improving risks and opportunities based on future insights considering climate change.
In 2024, we obtained the scores of B for Climate Change and A for Water Security.

The latest CDP questionnaire is here

Efforts to Reduce CFC Emissions

Our company is implementing the following initiatives to fulfill our responsibilities as the administrator of the target devices ^※1.

1. As of April 1, 2020, all applicable devices owned by Denka main office have been registered to the refrigerant management system (RaMS) of the Japan Refrigerant and Environment Conservation Organization (JRECO) ^※2, and appropriate management of devices as stipulated in the Fluorocarbon Emission Control Act from installation to disposal is being conducted.
2. In line with the replacement of aging air conditioning and refrigeration equipment, we are also switching to refrigerants with a lower greenhouse effect.

In addition, JRECO conducts an annual rating of companies regarding their understanding and awareness of the Act on Regulation, Efforts, and Information Disclosure of Fluorocarbons, and information dissemination. Our company has received the highest rating of A rank for three consecutive years.

In the future, we will continue to implement appropriate inspections and early leak prevention measures, and promote efforts to prevent global warming as well as ensure compliance with laws and regulations.

• ※1Applicable devices: First-class specified products (commercial air conditioning and refrigeration equipment) as defined in the CFC Emission Regulation Act
• ※2Number of owned devices: 6,748 (Air conditioning equipment 4,187 / Refrigeration and freezing equipment 2,561) As of June 30, 2025
• ※3Calculation of leakage amount: Carbon dioxide equivalent

Conducting third-party verification

In order to improve the reliability and transparency of the data of our greenhouse gas emissions, and to promote ongoing environmental management, we have received verification from an independent third party (Japan Quality Assurance Organization: JQA).
For details, please refer to the reports posted on our website.

Verification Period

Japan: April 1, 2023 – March 31, 2024
Overseas: January 1, 2023 – December 31, 2023

Scope of verification

1. Greenhouse gas emissions (energy-origin, non-energy-origin CO ₂ emissions) for Scope 1 and 2
2. Greenhouse gas emissions for Scope 3 (Categories 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)

Applicable business sites

1. Denka's 10 domestic plants (Omi Plant, Omuta Plant, Chiba Plant, Bibai Plant, Shibukawa Plant, Ofuna Plant, Isesaki Plant, Isesaki-Ota Plant, Niigata Plant, Kagamida Plant)
2. Greenhouse gas emissions from Denka headquarters aggregated for Scope 3 (Categories 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)

Scope of calculation

Scope 1 and 2 covers CO ₂ emissions from energy and non-energy sources during the period from April 2023 to March 31, 2024, at 10 plants in Japan.
Scope 3 (Categories 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15) covers emissions during the period from April 2023 to March 31, 2024. However, the targets for each category are based on our calculation rules.

Verification Report

Greenhouse Gas Emissions Verification Report (PDF format/911KB)Issued on March 27, 2025

Approach to Public Policy

The Denka Group declared its achievement of carbon neutrality by 2050 in fiscal 2020. As a milestone toward this goal, we aim to reduce CO ₂ emissions by 60% (compared to fiscal 2013) by 2030. To this end, it is important to engage not only with our Group and value chain but also with industry organizations, countries, and governments. We recognize that it is also important to make policy proposals to encourage countries and regions to take action.