TOK uses natural gas, except in areas where the natural gas supply for boiler fuel is unavailable, and the company has established voluntary regulations and monitoring for NOx and SOx emissions at plants that partially use heavy oil.

TOK recognizes soil and groundwater contamination and discharge of water pollutants as major risks that threaten the safety and health of local residents and employees and affect ecosystems. The company regularly monitors soil and groundwater, has established procedures that define protective measures and prompt information disclosure in case of water pollutant discharge exceeding standards, and provides regular training. For wastewater, the company established voluntary management standards stricter than legal requirements and prefectural regulations by discharging only water that meets company standards into public water bodies. In 2024, there were no environmental pollutant discharges exceeding standards.

TOK also manages PRTR law-designated substances through a dedicated system by working to monitor VOC and hazardous air pollutant emissions and appropriately reporting to authorities.

Comply with PRTR Law

Under the Japanese Pollutant Release and Transfer Register (PRTR) Act, companies must manage and report to the government the production, release, and transfer of designated chemical substances. TOK relies on its chemicals and PRTR management system to accurately calculate and report these figures. Of the Class I Designated Chemical Substances, which is a list of 515 substances defined by the PRTR Act, TOK handled 85 substances (a total of 2,046 tons) in 2024, including an estimated 2 tons released into the atmosphere and public water systems. TOK measures the emissions of VOCs and harmful air-polluting substances through PRTR surveys as a member of the Japan Chemical Industry Association.

* Data collection period: April 2024 to March 2025

Preserve Biodiversity

The TOK Biodiversity Protection Declaration guides our activities to preserve biodiversity. Every year, TOK implements CSR training (including biodiversity) for all directors, auditors, and employees at its domestic sites, as well as employees of partner companies for some operation centers. The company also dispatches employees to participate in the afforestation activities with residents of Kanagawa Prefecture through the Kanagawa Trust Midori Foundation.

Aso plant personnel participate in forest conservation activities hosted by the Aso Green Stock Foundation with the aim of improving and enhancing the water source conservation function of the Aso region and creating rich ecosystem environments. TOK also conducts activities at each site, such as collecting aquatic plants that have washed ashore at Lake Inawashiro near the Koriyama plant. TOK will continue to preserve biodiversity with the intention of starting a ripple effect inside and outside the company and contributing to the global environment

TOK Biodiversity Protection Declaration

1. We will position biodiversity protection as one of management’s highest priorities and strengthen protection activities for the global environment
2. We will work to continually reduce our environmental impact through our production activities, our development and provision of products and services, and in coordination with the supply chain, thereby working to protect biodiversity.
3. We will strive to enhance activities by educating employees on a regular basis and facilitating recognition and a correct understanding of the importance of biodiversity protection.
4. We will continually conduct social contribution activities for environmental protection to earn the esteem and trust of society
5. We will announce the results of initiatives and promote communication with the general public.