Accidents and Occupational Injuries

The Mitsui Chemicals Group positions as KPIs and monitors major accidents, the number of abnormal conditions/accidents as well as the occupational injury frequency.

Major Accidents and Abnormal Conditions/Accidents

In fiscal 2019, the Mitsui Chemicals Group reported zero major accidents*1, meeting its target of zero. However, the number of abnormal conditions/accidents*2 is on the rise, totaling 18 against the target of five or less. Because the causes of 13 of these accidents were equipment-related, studying prevention has become a major issue. To prevent recurrence, we are working on (1) developing appropriate maintenance plans, (2) reinforcing change management (risk assessment) and (3) improving the quality of construction.

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

*2Abnormal conditions/accidents:
Although under JPCA accident criteria having a severity level of less than 18 points, conditions/accidents that the Company judges should be monitored under Company standards taking into account the relevant laws and regulations.

Number of Major Accidents and Abnormal Conditions/Accidents

Number of Major Accidents and Abnormal Conditions/Accidents

* Including subsidiaries and affiliates within our Works, and the Works general manager bears the responsibility for Responsible Care implementation.

Occupational Injuries

Compared with the Japanese overall industry average and the Japanese chemical industry average, the Company maintains a high level in terms of Days Away from Work Cases (DAFWCs) and, in aiming to achieve the world’s highest standards for safety, targets a frequency of 0.15 or below with regard to significant occupational injuries*1.
The significant occupational injury frequency for the Mitsui Chemicals Group for fiscal 2019 was 0.31, and thus we were unable to achieve the targeted numerical value. Once again, the long-term issue is developing human resources with an awareness of hazards and spreading the safety culture throughout the entire Group. Accidents in the category, "becoming caught or entangled in machinery" often result in severe occupational injuries, and preventing this type of accident has become a priority issue over the past several years. Because the numbers of such accidents have not dropped at our domestic affiliates, we plan to focus our support in fiscal 2020 on preventing these types of accidents.

We have re-examined our targets for fiscal 2020 and later. The first objective is zero serious occupational injuries*2, a critical target that must be achieved by the entire Group. Next, the targets for the frequency of significant occupational injuries have been categorized according to the category of the accident. We clarified which body is responsible for management by separating the targets for Mitsui Chemicals, domestic affiliates, overseas affiliates and construction subcontractors. In particular, the targets for construction subcontractors have been reviewed to improve their performance below the average over the past three years. In recent years, the number of occupational injuries to personnel working in our factories on a temporary basis has increased, requiring better safety management on the part of Mitsui Chemicals as project owner. We are directing our efforts to preventing occupational injuries by implementing measures that address issues specific to the category of the injury.

*1Significant 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.

*2Serious Occupational Injuries:
Occupational injuries that fall under disability grades 1 to 7, causing death, injury or illness.

Comparison of Occupational Injury Frequency between Mitsui Chemicals, the All Industries in Japan and the Japanese Chemical Industry

Comparison of Occupational Injury Frequency between Mitsui Chemicals, the All Industries in Japan and the Japanese Chemical Industry

*Occupational injury frequency = Number of individuals killed or injured by occupational accidents x 1 million hours / Total working hours for all employees

*The figures for the all industries in Japan and for the Japanese chemical industry indicate the Days Away From Work Case (DAFWC) frequency. The Mitsui Chemicals figures represent the DAFWC frequency until the end of the first half of fiscal 2012, and the Significant Occupational Injury frequency from the second half of fiscal 2012.


*1Ministry of Health, Labour and Welfare White Paper Survey on Industrial Accidents

*2Japan Industrial Safety & Health Association “General Guidebook on Industrial Safety”

Significant Occupational Injury Frequency

Significant Occupational Injury Frequency

*Includes contractors operating on site.

Number of Occupational Injuries Resulting in Zero or More Lost Work Days by Type

Number of Occupational Injuries Resulting in Zero or More Lost Work Days by Type

*Includes subcontractors operating and constructing for Mitsui Chemicals.

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