Occupational Health and Safety

Scope: Employees and temporary employees of the Semiconductor Company, Metrology Company, and Administration Company, Tokyo Seimitsu

The total number of occupational accidents in fiscal 2024 decreased by nine from the previous fiscal year, with one involved in an accident resulting in leave and nine others involved in accidents not resulting in leave. Many of these accidents occurred during work. We therefore urge employees to keep their workplace clean and tidy and step up the workplace patrol. We are also promoting other efforts such as workplace meetings and the practice of calling out to each other.

Scope: Employees and temporary employees of the Semiconductor Company, Metrology Company, and Administration Company, Tokyo Seimitsu

Tokyo Seimitsu uses accident frequency rate and severity rate as indicators to evaluate the occurrence of occupational accidents.
We monitor annual results and the occurrence of occupational accidents at manufacturing companies (companies with over 100 employees).

*¹ Frequency rate: Indicates the frequency of injury or death due to occupational accidents.
    Formula: (Casualties / total hours worked) × 1,000,000
*² Ministry of Health, Labour and Welfare (Survey on Industrial Accidents)

*¹ Severity rate: Percentage of the degree of loss caused by occupational accidents.
    Formula: (Total lost workdays / total hours worked) × 1,000
*² Ministry of Health, Labour and Welfare (Survey on Industrial Accidents)

Our plants in Hachioji, Hanno, and Tsuchiura each have the Safety and Health Committee, with each plant manager serving as the general safety and health manager. The committee plans and deliberates on major health- and safety-related matters in a bid to maintain and improve a safe and comfortable work environment. To raise employees’ awareness of health and safety in the workplace and in the interest of maintaining and promoting their health, the committee meets once a month, in principle, and on an ad hoc basis when the general safety and health manager deems necessary. In fiscal 2024, the Safety and Health Committee met as scheduled. At the Furudono Plant, which is a small-scale worksite with fewer than 50 employees, the Plant Manager promotes workplace health and safety as a health promoter, and participates in and reports on the Safety and Health Committee of the Tsuchiura Plant. We also conduct internal audits twice a year, with results submitted to the Audit Department and reported to the Board of Directors. The Health and Safety Committee is subject to audits by the Audit Department.

In addition, each plant has appointed a Chemical Substances Control Manager and a Personal Protective Equipment Manager.

At the Hachioji Plant and Hanno Plant, health supervisors generally conduct weekly workplace patrols to check equipment, work methods, and hygiene conditions, and take necessary measures. Patrol records for which health supervisor workplace patrol checklists are used are submitted to the General Affairs Section and kept for five years.

At the Tsuchiura Plant, managers and general staff conduct weekly 5S patrols, while the Health and Safety Subcommittee members perform monthly safety patrols. In cases where improvements are needed, follow-up patrols are conducted after the improvements are proposed to confirm the effectiveness of the patrols.

We regularly conduct risk assessments by conducting workplace inspections to check working environments and identify issues. This leads to the creation of measures for dealing with these issues and brings about improvements. In addition to risk assessments performed when introducing new machinery or changing work procedures, we work to avoid risk by conducting education and training on machinery operation, heavy equipment work, wiring operation, and other topics as needed.

We conduct in-house training and certification testing to help employees avoid hazards in a variety of situations, including commuting, traveling, and working in the plant.

In order to promote activities to prevent industrial accidents among local workers, we participate in seminars held by the Tokyo Federation of Labor Standards Associations, Hachioji Branch. These seminars are designed for participants to acquire the skills necessary to engage in work. Employees who have completed the seminars take in-house practical tests tailored to factory environments for thorough health and safety education.

Locations covered: Tokyo Seimitsu Co., Ltd. Hachioji Plant, Hanno Plant, Tsuchiura Plant, and Furudono Plant

Locations covered: Tokyo Seimitsu Co., Ltd. Hachioji Plant, Hanno Plant, Tsuchiura Plant, and Furudono Plant

The Semiconductor Equipment Association of Japan promotes “SEAJ recommended safety training” an industrial standard for safety training of personnel involved in the installation, maintenance, and servicing of semiconductor manufacturing equipment. At the Hachioji Plant, our employees who belong to the Semiconductor Equipment Association of Japan’s Safety Training Subcommittee conduct “SEAJ recommended safety training” for Semiconductor Company CEs and manufacturing and design engineers who work on the manufacturing floor or in the clean room. A total of 614 employees have participated in the seminar so far.

Every year, the Disaster Prevention Subcommittee under the Safety and Health Committee plans and conducts emergency evacuation drills for all plant employees, including those working at subsidiaries and affiliated companies within our plants.

At the Hachioji, Hanno, and Tsuchiura plants, we organize self-defense fire brigades and conduct regular training one or two times a month according to annual plans. The Company also participates in an annual “self-defense firefighting training review” hosted by the Hachioji Fire Department and the Hachioji Fire Prevention Management Study Group. In this competition, self-defense fire brigades from business establishments in the city gather to compete in a heated competition to test the effectiveness of their daily training based on speed and accuracy of indoor fire hydrant operation. In the review of fiscal 2024, 40 teams from 33 business offices in Hachioji City participated. Our self-defense fire brigade from the Hachioji Plant competed in the “No.1 Fire Hydrant, Course B” category.

Emergency scenario training is conducted at least once a year at each plant so that appropriate tasks, such as recovery/ cleaning, can be carried out in the event of a hazardous substance leak or splash-based accident. Each division that handles hazardous substances submits a training plan to the person responsible for environmental management at the beginning of the relevant term and submits a report after the training is conducted. In fiscal 2024, the Hachioji Plant conducted training 48 times for 16 divisions. At the Tsuchiura Plant, 185 people from the plant department took part in “chemical cleaning agent splash prevention training.”

・Training for Leakage of Chemical Substances with High Alkaline Content

・Chemical cleaning agent splash scenario drill

When considering the purchase of industrial chemicals, we conduct a chemical substance risk assessment to check for the presence of contained environmental pollutants (organic solvents, specified chemical substances, hazardous materials, etc.), in accordance with our internal regulations. The department in charge of this matter at the Hachioji Plant decides whether to purchase the chemicals based on the results of assessments conducted at the Hachioji, Hanno, and Tsuchiura plants. In fiscal 2024, 94 chemical substance risk assessments were conducted for newly adopted chemicals and to review chemicals already in use. We require divisions that manage and use chemical substances to conduct regular inspections and regular quantity checks.

The Company is also promoting the reduction and substitution of chemical substances in accordance with the PRTR Act, Ordinance on Prevention of Organic Solvent Poisoning, and the Poisonous and Deleterious Substances Control Act. In addition, we carry out patrols to check the status of chemical management and storage and the supplies used to prevent chemical leaks through the Regulated Substance Control Working Group under the Safety and Health Committee.