Management System

安全は全てに優先する 安全は全てに優先する

Policy and Basic Approach

The Mitsui Chemicals Group places top priority on safety for the Group’s sustainable growth. Safety is the foundation of society’s trust, and at the same time, ensuring safety increases our manufacturing quality, leading to improvement of corporate value from the financial viewpoint.
With this approach, we established a management policy that states “Safety is our top priority,” and our Responsible Care Policy declares that, “We pledge that safety is our top priority and will focus on achieving zero accidents and occupational injuries.” Top management repeats this policy as the President’s message, etc. to all the Group employees on many occasions, such as in opening addresses, plants visits, Safety Day messages, and in Company newsletters.
All employees of the Mitsui Chemicals Group including contractors are committed to relentlessly implementing the safety culture, reaffirming their heartfelt commitment to the pledge “safety is essential and for the benefit, not only of ourselves, but also our families, colleagues, and society as a whole.”
The Mitsui Chemicals Group understands the key to realizing this vision of safety and accident prevention is to maintain a high level of safety regardless of the diversification of employees, facilities, and technologies as business globalization and business portfolio reform progresses. In line with this vision, we strive to provide education and training to employees to be able to put fundamental safety initiatives into practice, globally promote the safety culture, and introduce and disseminate new safety technologies.

System and Responsible Officers

The chief responsible officer is the president. The responsible officer in charge of the Production & Technology Center is appointed as the person directly responsible. The Safety & Environment Technology Division formulates, disseminates, and promotes the safety and prevention strategy. The Responsible Care Committee creates an annual plan and a medium to long-term plan, based on the strategy progress reports and any challenges identified during the strategy review and environmental analyses obtained within and outside the Group.
We hold regular meetings with each site, such as monthly all works liaison meetings and semiannual affiliate liaison meetings, to ensure safety and accident prevention in each business division, production site, and affiliate.
The Safety and Environment Technology Division regularly monitors the achievement of the priority issue targets relating to safety and accident prevention at domestic sites and ascertains the progress made. The Division also collects, consolidates, and analyzes information on the occurrence of any serious accidents and occupational injuries across the entire Group and shares this information throughout the Group.
Management and labor union members in the Head Office hold regular meetings to deliberate issues relating to occupational health and safety. Such meetings are also conducted in each site as Health and Safety Committee meetings, in which attendees report on and deliberate issues relating to occupational health and safety, including occupational injuries.

Internal Audit

The Internal Control Division conducts environmental & safety audits (for environmental protection, safety and prevention) at Works and laboratories of the Mitsui Chemicals Group.

Environmental & Safety Audit
(safety and prevention)
Confirms that the policy of "safety is our top priority" is being comprehensively implemented, that activities are being organized to eliminate accidents and occupational injuries and that there is compliance with the relevant laws and regulations. Indicates nonconformities that require revision or improvement.
Scope: Works and laboratories of Mitsui Chemicals Inc. and its subsidiaries and affiliates
Frequency* Once every one to three years (depending on size, business type and management level of the audited organization)

*A remote audit is conducted if an On-site audit is difficult due to COVID-19 restrictions.

Goals and Results


KPI Scope FY2020 FY2021 FY2025
(Medium to
Goals Results Level
Goals Goals
Number of major accidents*1 Mitsui Chemicals Group 0 0 0 0 ongoing
Number of abnormal conditions / accidents*2 Mitsui Chemicals Group 7 or less 29 7 or less

*1Major accidents:
Of accidents and abnormal conditions, those with a severity level of 18 points or more, as specified by the Japan Petrochemical Industry Association (JPCA) under the Center for Chemical Process Safety (CCPS) evaluation procedures.

*2Abnormal conditions/accidents:
Events that were legally handled as an abnormal condition or accident among the reported explosions, fires, leakages, bursts, breakages, or abnormal reactions. This classification was revised in fiscal 2021 to exclude leakage of CFCs and small amount leakages.

Occupational injury

KPI Scope FY2020 FY2021 FY2025
(Medium to
Goals Results Level
Goals Goals
Number of serious accidents*1 Mitsui Chemicals Group 0 0
Significant occupational injury frequency*2 Mitsui Chemicals Group 0.15 or less 0.22 0.15 or less 0.15 or less
Mitsui Chemicals, Inc.*3 0.15 or less 0.10 0.15 or less
Domestic Subsidiaries & Affiliates 0.15 or less 0.40 0.15 or less
Overseas Subsidiaries & Affiliates 0.15 or less 0.21 0.15 or less
Construction subcontractors 0.23 or less 0.39 0.29 or less

*1Serious Occupational Injuries:
Occupational injuries that fall under disability grades 1 to 7, causing death, injury or illness.

*2Significant occupational injuries:
“Significant Occupational Injuries(SOIs)” refer to occupational injuries that resulted in absence from work or death. SOIs also include lighter occupational injuries that, due to the potential danger in the cause of the injury, could have led to absence from work or death. SOIs do not include those injuries that are not directly related to operations.

*3Includes contractors operating on site.

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