Environmental Targets and Results

Promoting energy efficiency and conservation and reduction of greenhouse gas emissions

Business classification system based on the Act on Rationalizing Energy Use

In accordance with periodic reports submitted to the Ministry of Economy, Trade and Industry for FY2025 under the Act on Rationalizing Energy Use, our business received a Class A rating, indicating the expectation for further efforts in energy efficiency and conservation.

As of August 31,2026

Energy conversion to liquefied natural gas (LNG)

Since 2009, the Harima Plant has been working to reduce greenhouse gas emissions through initiatives such as the conversion of boiler fuel to liquefied natural gas (LNG). In 2011, we registered for the domestic credit system certification (currently the J-Credit Scheme) and transferred a total of 15,000 tons of CO₂ reduction credits between 2010 and 2017.
Building on these achievements, we continue to promote energy efficiency and conservation measures as well as initiatives to improve energy performance. Looking ahead, we will further advance energy transition efforts while contributing to the realization of a decarbonized society.

Energy efficiency and conservation activities

We have established a working group across all production sites to continuously promote energy efficiency and conservation activities aimed at reducing energy consumption.
As part of these efforts, the Harima Plant upgraded its boiler facilities in 2023, achieving a 6.4% improvement in overall efficiency. This initiative has resulted in an annual reduction of approximately 244 tons of CO₂ emissions.
In recognition of its energy-saving impact, this project was selected for support under the Advanced Energy Conservation Investment Promotion Support Project subsidy program.

Renewable Energy Utilization

Installation of Solar Panels and Energy Storage Systems

At the Fukui Plant, solar panels with a total output capacity of 497 kW have been installed on factory rooftops and carports, and energy storage systems with a total capacity of 538 kW have been introduced within the same site.
Through these initiatives, approximately 10% of the plant’s total electricity consumption is supplied by on-site power generation, contributing not only to reduced environmental impact but also to enhanced preparedness for disasters.

100% Renewable Electricity through Hydropower

Promotion of recycling

The NAGASE Group’s environmental policy promotes resource conservation, including the reduction of energy and water usage, as well as waste reduction and recycling.
In alignment with this policy, we are working to realize a circular economy that balances economic growth with environmental impact reduction. Our initiatives include controlling the concentration of chemical ingredients used in semiconductor and flat panel display manufacturing processes to extend their lifecycle, reducing chemical usage, and reusing spent chemicals through distillation.

Promotion of green procurement

The basic principle for the management of hazardous chemical substances at our company is not to allow prohibited substances into our offices/factories, that is, not to manufacture prohibited substances and not to purchase raw materials containing prohibited substances.

We have established an organization specializing in chemical substance management to comply with domestic regulations and various laws and regulations, including the EU RoHS Directive and industry and customer requirements. We are working to reduce the environmental impact of our products by voluntarily reducing or eliminating the use and discharge of chemical substances where there is concern about their environmental risks.

Biodiversity conservation

We conduct our business activities in accordance with the NAGASE Group’s Basic Approach to Biodiversity and its Business Activity Policies.
Human and corporate activities can have various impacts on local ecosystems. As part of our commitment to creating a safe, secure, and warm society where people can live comfortably, we have long supported local greening initiatives.
The NAGASE Group sets voluntary environmental standards that are stricter than those required by laws, municipal regulations, and agreements related to pollution prevention, and strives to comply with them as part of its basic approach to pollution control.
In line with this approach, we maintain rigorous control over wastewater discharged from our manufacturing sites to fulfill our responsibility to protect the environment and biodiversity of rivers, watersheds, and marine areas.

Basic Approach to Water Resources

The Sustainable Development Goals (SDGs) established and promoted by the United Nations include securing a stable supply of water and richer lifestyle, including access to water for all people.
Here, the NAGASE Group works to rigorously reduce, reuse, and recycle in its business activities, striving to improve its use efficiency and reduce its usage volumes.
Especially in areas with high water stress, we take measures according to the details of the risk by analysis using the Water Risk Filter (WRF).

Water Resource Management

Water intake
All of our sites draw water from third-party water supplies. In addition, the Harima Plant also draws water from groundwater.

Water drainage
Due to the geographical conditions of the site, water is discharged into the river basin at the Harima Plant. At the time of discharge, we promote various measures, such as reducing the pollution load to improve the water environment and set management standards to maintain the quality of wastewater so that it conforms to environmental standards.

Recycling
Condensed water after steam generation is reused for boiler water supply at several sites. Recycled water is also used for cooling in water-cooled chillers.
At the Fukui Plant, rainwater is stored in tanks and effectively utilized as dilution water in the wastewater treatment process.
In addition, all drainage channels within the plant are connected to collection pits, enabling the prevention of wastewater discharge to the outside and ensuring appropriate management and response in the event of chemical spills caused by disasters or equipment failures.

Engagement to conserve water quality at production sites

In the water risk assessment (basin risk) of manufacturing sites conducted in fiscal year 2026 using the WWF Water Risk Filter, the Harima Plant was evaluated with a basin risk score of 2.24.

One of the Largest ozone-generating wastewater treatment facilities in Japan

We treat wastewater generated from our manufacturing processes using advanced wastewater treatment facilities, and discharge it into rivers only after ensuring that the water quality meets or exceeds regulatory standards. As part of our effort to reduce our environmental impact, we have continuously improved and upgraded our wastewater treatment methods and facilities. Wastewater that could not be fully purified in the past and was treated as industrial waste is now purified on-site to reduce environmental impact through waste reduction. Furthermore, we have introduced an Advanced Oxidation Process (AOP) facility utilizing ozone technology to prevent the discharge of wastewater that exceeds regulatory limits in the event of a COD level increase.

Utilization of well water (groundwater)

The NAGASE Group considers the 3Rs of water—reduce, reuse, and recycle—to be important initiatives for conserving limited water resources. At our Harima Plant, located in the Ibo River basin where groundwater is abundant, we use groundwater as cooling water in our manufacturing processes. We also promote the 3Rs of water at our manufacturing sites by cascading the use of cooling water as cleaning water in other processes.