TOKYO OHKA KOGYO CO., LTD. (TOK) provides chemical products, such as photoresist, and equipment for semiconductors and liquid crystal displays.

Environmental ActivitiesEnvironmental Policy

Environmental Activities

Corporate Social Responsibility

Promotion of recycling, managing chemical substances,
and approaches toward energy saving.

Environmental Policy

Contributing to society in our aim to become a corporate group that is trusted around the world, is one of the most important themes in our management plans. Accordingly, we will track our impact on the environment in all phases, from product development to procurement, production, sale, and disposal. Reducing environmental impact from our corporate activities by complying with laws and regulations, as well as our internal regulations and social norms, and balancing production with environmental conservation while preventing of pollution. We will take steps to accelerate the development of businesses in the environment and energy fields in order to contribute to the creation of energy on a global scale.

  1. Enhance handling and management with consideration for chemical safety and the environment.
  2. Promote efficient use, reuse, and recycling of resources.
  3. Promote activities to conserve energy and mitigate global warming.
  4. Prevention of pollution.

Promotion of Recycling

In order to effectively use our planet's limited natural resources and create a recycling-based society, we are always striving to reduce the volume of waste materials by promoting recycling.

Promotion of Recycling

We recover organic solvents (process effluents) used during manufacturing processes and perform on-site refinement so these chemicals can be reused in the same processes. These and other activities allow us to reduce the volume of industrial waste materials. When materials cannot be reused at a plant, we send them to recycling companies where they undergo distillation and other processes for recovery and eventual reuse.

In cases where recovery using distillation is not possible, used solvents are reused as a resource in a variety of ways, such as for fuel at cement plants. TOK is also promoting initiatives for the use of waste plastics as a raw material for plastic reclamation companies, and used bottles as a raw material for glass manufacturing companies.

Managing Chemical Substances

TOK uses many types of chemicals in its manufacturing activities. Properly managing these chemicals is essential to maintaining workplace safety and health. We also prioritize the management of chemicals from the standpoint of reducing our environmental impact.

We properly manage the chemicals subject to Japan's Pollutant Release and Transfer Resister (PRTR) Law, based on our proprietary system. Even at the earliest stages of procuring raw materials, we check their hazardousness and examine any legal regulations, so as to ensure strict chemical management. In addition, we have improved our system, based on our unique "TOK List of Prohibited Substances"; this enables us to evaluate the chemicals contained in raw materials at the stage of designing new products, in this way, when the products are used, we are able to ensure conservation of the environment, health, and safety.

Conceptual chart of the screening process for hazardous chemicals

Measures to Reduce the Input of Energy Resources and Greenhouse Gas Emissions

TOK is lowering its energy requirements in numerous ways. Among major initiatives are improvements to manufacturing processes, steps to boost employee productivity and the promotion of efficient equipment, including the use of exterior coatings with thermal insulation properties on buildings.

By taking measures, such as the introduction of the cogeneration system to the Koriyama plant and the use of natural gas as boiler fuel, we are playing our part in reducing greenhouse gas emissions.

Cooling tower (Aso Plant)

Cooling tower (Aso Plant)

Exhaust gas processing device (Sagami Operation Center)

Exhaust gas processing device (Sagami Operation Center)

Overseas Environmental Programs

Overseas subsidiaries have many environmental conservation activities, including programs to earn ISO 14001 certification, in order to lower the TOK Group's global environmental impact.
To establish efficient and effective environmental management systems.

Subsidiaries in the United States, Taiwan and China have already earned this certification.







Environmental ActivitiesEnvironmental Policy