Mitsui Chemicals

Safety and Prevention

Safety and Prevention Drills

At Mitsui Chemicals, we hold evacuation drills and emergency shutdown drills in the event of a major earthquake or tsunami. We also hold various disaster drills that include emergency activities such as firefighting, emergency call-outs and reporting as part of measures to respond to emergencies at Works. Going forward, we will conduct various drills in a systematic, ongoing manner in tandem with relevant government agencies and local communities.

Process Safety and Disaster Prevention Drills

At Mitsui Chemicals, we are continually improving our in-house disaster prevention capabilities. In addition to conducting disaster prevention drills, including emergency activities such as firefighting, emergency call-outs and reporting, we also carry out joint drills with municipal fire and police departments, validate emergency responses and take steps to improve any shortcomings. We formulate site-specific plans for each Works every year and conduct drills designed specifically for the operations carried out at each of our sites. We also organize full-scale comprehensive disaster prevention drills on a regular basis at each of our Works, including joint training with municipal fire departments and volunteer firefighting units, and training involving the local police. We work with municipal fire departments and nearby companies to organize joint disaster prevention drills as a form of reciprocal training between companies. We introduce some examples of the drills below.

Ichihara Works

Based on the scenario of the leakage and ignition of flammable liquid from equipment at night when the Works were closed, we jointly implemented a Works comprehensive disaster prevention drill in conjunction with the volunteer firefighting organization and municipal fire service as well as the joint firefighting units from neighboring companies. We confirmed that disaster prevention operations could be reliably carried out in cooperation with each disaster prevention organization even at night when the Works are closed.

Ichihara Works Mobara Branch Factory

Based on the scenario that an abnormal reaction between hazardous materials in a tank had caused a fire, we implemented a Works comprehensive disaster prevention drill in cooperation with the municipal fire service. In the training, we confirmed the initial response system at the time the disaster occurred and the roles of each group and each person.

Nagoya Works

Based on the scenario that a major earthquake, such as along the Tokai/Nankai Trough, has occurred, we implemented a Works comprehensive disaster prevention drill with the aim of preventing more widespread damage should an accident occur. In training, we also conducted a ShakeOut drill that helps to ensure personal safety when an earthquake strikes and confirmed that all employees were able to act promptly and properly.

Osaka Works

Timed to coincide with a comprehensive disaster prevention drill organized by the Sakai-Senboku Rinkai Special Disaster Prevention District Council, we jointly implemented a Works comprehensive disaster prevention drill with administrative organs, such as Osaka Prefecture and the Sakai City Fire Department, and all the Council-affiliated companies. The drill was based on the scenario that flammable liquid had leaked from equipment and ignited. During the drill, in addition to disaster response training, we also conducted training in cooperation with the relevant administrative bodies and neighboring companies.

Iwakuni-Ohtake Works

Based on the weekday daytime scenario that the gas detection system installed at the plant the plant has been activated and that the high-pressure gas that has leaked from the mounting flange of a safety valve installed on a pipe has been ignited by static electricity, we jointly implemented a Works comprehensive disaster prevention drill with the municipal fire service. We are working to enhance our disaster prevention capabilities by repeating training in a number of areas, including emergency equipment shutdowns and the bringing of disaster situations under control.

Omuta Works

Based on the scenario of the leakage and ignition of flammable liquid from a new plant, we jointly implemented a Works comprehensive disaster prevention drill with the municipal fire service. During the drill, which was also observed by police officers and officials from the municipal disaster prevention office, we verified methods for relaying information for the evacuation and guidance of local residents as well as cooperation with the relevant administrative bodies, from activities such as providing information to responses to a series of disasters.


Disaster prevention activity with a chemical disaster prevention vehicle (Ichihara Works)


Firefighting activity
(Mobara Branch Factory)


Stacking of sandbags to prevent leakage of material (Nagoya Works)


Firefighting activity (Osaka Works)


Firefighting activity
(Iwakuni-Ohtake Works)


Giving instructions at on-site command post (Omuta Works)

Earthquake and Tsunami Drills

At Mitsui Chemicals, we conduct various drills to ensure that all staff are better prepared in the event of a major earthquake or tsunami, which are assumed in every site’s region. These include emergency shutdown drills and evacuation drills to evacuation areas. The following are a few select examples of the drills conducted at each production site.

Ichihara Works

Based on the scenario that an earthquake has struck and a massive tsunami warning has been issued for Tokyo Bay, we conducted rule-based emergency plant shutdown drills as well as evacuation drills.
Approximately 2,600 Company employees and employees from subcontractors took part in the drill. We confirmed the location of and routes to evacuation areas as well as the procedures for confirming the safety of employees at the evacuation area, and verified the criteria with regard to evacuations. By repeatedly undertaking evacuation drills, we are working to reduce the time needed to safely complete an evacuation.

Osaka Works

In conjunction with the Osaka 8.8 Million Drill organized by Osaka Prefecture, Osaka Works conducts evacuation drills covering the initial response at the time a tsunami warning associated with a Nankai Trough Earthquake is issued and evacuation to the tsunami evacuation area. In addition to conducting skills training on initial response for when an earthquake occurs and on evacuation methods, we are working to raise disaster prevention awareness, conduct the verification of training and improve earthquake and tsunami measures.

Omuta Works

Based on the Company’s High-Pressure Gas Hazard Prevention Rules, we conducted evacuation drills using a scenario in which high-pressure gas had leaked when an earthquake had struck. At each workplace, we selected an emergency evacuation route and a designated evacuation area according to the situation at the time of the earthquake while conducting the training with a sense of realism.


A drill to confirm the safety of personnel at a tsunami evacuation area
(Ichihara Works)


A drill to confirm the safety of personnel at an earthquake evacuation area
(Osaka Works)


Drill simulating an evacuation following an earthquake (Omuta Works)

Iwakuni-Ohtake Works’ Self-defense Disaster Prevention System Receives Fire and Disaster Management Agency Director’s Award (Encouragement Award)

The Iwakuni-Ohtake Works’ self-defense disaster prevention system received a Fire and Disaster Management Agency Director’s award (Encouragement Award) at the Fiscal 2017 Skill Contest of Self-defense Disaster Protection Systems for Petrochemical Complexes, etc. organized by the Fire and Disaster Management Agency of the Ministry of Internal Affairs and Communications.
This contest, which was first launched in fiscal 2014 with the aim of enhancing skills and morale, pits large-scale chemical plant elevated water cannon and foam concentrate transporter crews against each other in a number of operations, such as their safety management and the standard of their firefighting vehicles and equipment.
Judging the Iwakuni-Ohtake Works’ self-defense disaster prevention crew on its fire control technique and discipline, this award marked the fourth year in a row since the contest started that the crew had received an award. Accumulating experience from daily training that will lead to improved disaster prevention techniques in the years to come, we will unite in striving for safer and more stable Works operations.


Self-defense disaster prevention crew


A general view of the skill contest