Sustainability
Safety and Health
Occupational Safety and Health
The NGK Group operates an Occupational Safety and Health Management System (OSHMS) in line with its Safety and Health Policy. The OSHMS serves as a mechanism for the ongoing, systematic achievement of employee safety and health initiatives. By strictly implementing this system and conducting risk assessment-based safety measures, we strive to raise the level of occupational safety and health throughout the entire Group.
Safety and Health Policy
Maintaining the safety and health of each employee constitutes the basis for a company's operation and existence
- Comply with occupational safety and health laws and company regulations.
- Engage in activities in line with the OSHMS to continuously raise the safety and health standards.
- Promote safety and health activities under enough education and training and good communication with employees.
- Reduce the risks of hazards and toxicity and prevent accidents to provide a comfortable work environment.
- Prevent employees' health hazards and enhance health promoting activities.
Structure to Promote Safety and Health Management

Enhancing Safety and Health Activities
NGK views the enhancement of safety and health activities as one of its top priorities. As such, we developed a three-year action plan in fiscal 2016 built around the key themes of compliance, risk reduction, and enhanced governance and have undertaken activities based upon it. These activities have resulted in us achieving overall targets for compliance and enhanced governance. However, for risk reduction, we found that for the Group as a whole risk assessment for jobs other than routine work was insufficient. In particular, we determined it necessary to step up risk response to prevent electrocution, explosions, and employees getting caught in rotating machinery—the cause of critical disasters and major accidents.
In fiscal 2019, towards preventing critical disasters and major accidents or minimizing their damage, we formulated the second three-year action plan prioritizing the strengthening of risk management and governance systems.
In addition, we have promoted the acquisition of international occupational safety and health management system certification by all NGK sites, factories, and manufacturing-related Group companies in and outside Japan.
These safety and health efforts have earned NGK certification from the Japan Industrial Safety and Health Association (JISHA) for ISO 45001 and for JIS Q 45100, a first for Japan,. This was one of the reasons NGK received the Chairperson Prize in JISHA's 2019 Occupational Health and Safety Activity Awards.
Activities in FY2019
Medium-term action plan | Action items | Priority activities |
---|---|---|
Strengthen risk management | Identify critical disaster risks and serious hazard risks and strengthen preventative measures |
|
Develop a more fully integrated governance structure | Set in place governance systems at Group companies |
|
Work-Related Accidents
Item | Scope | Category | 2015 | 2016 | 2017 | 2018 | 2019 |
---|---|---|---|---|---|---|---|
Number of work-related accidents |
NGK | Lost worktime accidents | 2 | 3 | 1 | 4 | 0 |
Non-lost worktime accidents | 9 | 3 | 2 | 8 | 7 | ||
Total | 11 | 6 | 3 | 12 | 7 | ||
Manufacturing Group companies in Japan |
Lost worktime accidents | 4 | 3 | 0 | 1 | 1 | |
Non-lost worktime accidents |
6 | 5 | 7 | 7 | 7 | ||
Total | 10 | 8 | 7 | 8 | 8 | ||
Manufacturing Group companies outside Japan |
Lost worktime accidents |
- | 30 | 20 | 8 | 13 | |
Non-lost worktime accidents |
- | 12 | 8 | 9 | 6 | ||
Total | - | 42 | 28 | 17 | 19 |
Work-Related Accidents

Lost Worktime Accidents and Non-Lost Worktime Accidents by Type (past 7 years; NGK)

Severity Rate (number of lost workdays per 1,000 hours worked)
Item | Scope | 2015 | 2016 | 2017 | 2018 | 2019 |
---|---|---|---|---|---|---|
Severity rate (%) (Number of lost workdays per 1,000 hours worked) |
Entire NGK Group | - | 0.026 | 0.013 | 0.193 | 0.012 |
NGK | 0.007 | 0.004 | 0.000 | 0.743 | 0.000 | |
Manufacturing Group companies in Japan |
- | 0.009 | 0.000 | 0.000 | 0.005 | |
Manufacturing Group companies outside Japan |
- | 0.040 | 0.022 | 0.015 | 0.020 | |
All industries (Japan, sites with 100 or more employees)* | 0.070 | 0.100 | 0.090 | 0.090 | 0.090 | |
Manufacturing industry (Japan, sites with 100 or more employees)* | 0.060 | 0.070 | 0.008 | 0.100 | 0.100 |
Statistics on work-related accidents from Japan's Ministry of Health, Labor, and Welfare.
Rate of Lost-Worktime Injuries (number of lost-worktime accidents per a million hours worked)
Item | Scope | 2015 | 2016 | 2017 | 2018 | 2019 |
---|---|---|---|---|---|---|
Rate of lost-worktime injuries (Number of lost-worktime accidents per a million hours worked) |
Entire NGK Group | - | 1.00 | 0.55 | 0.32 | 0.34 |
NGK | 0.29 | 0.34 | 0.11 | 0.40 | 0.00 | |
Manufacturing Group companies in Japan |
- | 0.50 | 0.00 | 0.14 | 0.13 | |
Manufacturing Group companies outside Japan |
- | 1.42 | 0.91 | 0.34 | 0.56 | |
All industries (Japan, sites with 100 or more employees)* | 1.61 | 1.63 | 1.66 | 1.83 | 1.80 | |
Manufacturing industry (Japan, sites with 100 or more employees)* | 1.06 | 1.15 | 1.02 | 1.20 | 1.20 |
Statistics on work-related accidents from Japan's Ministry of Health, Labor, and Welfare.
Rate of Occupational Disease
Item | Scope | FY2015 | FY2016 | FY2017 | FY2018 | FY2019 |
---|---|---|---|---|---|---|
Rate of occupational disease (%) | NGK | 0.00 | 0.11 | 0.11 | 0.10 | 0.00 |
Number of Deaths from Work-Related Accidents
Item | Scope | 2015 | 2016 | 2017 | 2018 | 2019 |
---|---|---|---|---|---|---|
Number of deaths from work-related accidents (persons) | NGK | 0 | 0 | 0 | 1 | 0 |
Manufacturing group companies in Japan | 0 | 0 | 0 | 0 | 0 | |
Manufacturing group companies outside Japan | 0 | 0 | 0 | 0 | 0 |
In 2018 there was one work-related fatality. This fatality was the result of a traffic accident involving the truck of another company, which struck an NGK employee in a crosswalk.
External Certification on Occupational Safety and Health Management System
To continuously raise the level of occupational safety and health in workplaces, we encourage companies in the NGK Group to acquire certification for international occupational safety and health management systems.
In 2017, our Nagoya Site received the first ISO 45001 private certification in Japan. In 2018, all other NGK sites and factories in Japan received ISO 45001 certification and JIS Q 45100 2018 DRAFT certification.
In addition, 23 of the 27 manufacturing-related Group companies in Japan and overseas have ISO 45001 or OHSAS 18001 certification.
Acquisition of Management System Certification
Item | Scope | Category | FY2018 | FY2019 |
---|---|---|---|---|
Acquisition of occupational safety and health management system certification | NGK | ISO 45001 and JIS Q 45100 | 100% | 100% |
Manufacturing Group companies in Japan (12) |
ISO 45001 | 58% | 100% | |
Manufacturing Group companies outside Japan (15) | ISO 45001 or OHSAS 18001 | 40% | 73% |
Note: NGK/Nagoya Site, Chita Site, Komaki Site, Ishikawa Plant, Mitake Plant
Danger-Prediction Training Center Established


In order to reduce occupational accidents caused by young workers or inexperienced workers, we have replaced our conventional training center with a 450 m2 Danger-Prediction Training Center at the Chita site, where we provide safety education led by employees who have accumulated experience outside the company.
In the training center, cranes, equipment for experiencing dangers such as being caught in rotating machinery, and mannequins are arranged to simulate occupational accidents that have occurred in the company. In addition to training regarding general hazards, the program is designed to enhance sensitivity to danger through practical simulated situations.
In 2020, we introduced hazard simulation VR (virtual reality) and CG (computer graphics) equipment, thus enabling a new training program combining existing hazard simulation equipment and lectures that will boost workers’ sensitivity to danger.
High-Visibility Vests
Although the Danger-Prediction Training Center was established to provide training that lowers the incidence of work-related accidents caused by younger or less experienced employees, this group still accounts for 40% of all accidents at NGK. In response, we made it mandatory starting in 2020 for these less experienced employees to wear high-visibility vests. This helps create a work environment conducive to accident prevention in two ways: by making the vest wearers conscious of their own inexperience, and by making it easy for other workers to see exactly who the inexperienced workers are.

Hosting a Safety Process Expert Meeting (PEM)
NGK's Ceramic Products Business Group brings together overseas production site safety and health managers to its yearly Safety Process Expert Meeting (PEM) with the aim of improving safety levels across the NGK Group. In fiscal 2019, a total of over 30 employees from HONEYCERAM® production bases in and outside Japan gathered at the NGK Nagoya Site to share Group-wide activity policies and plans related to safety and health, and to exchange information about their respective companies. And with the aim of boosting risk assessment skills, all participants toured the plant to observe work processes and discuss things like potential sources of danger, successful measures, and possible improvements to be made.