025 gloria blue nega

Theme 3 : Growing with Society

Environmental Risk Management

Environmental Risk Management

Environmental Risk Management


Promoting Legal Compliance, and Pollution Mitigation and Prevention

Komatsu complies with national and local laws and regulations and ensures that it periodically reports and maintains measurement results.
In FY2020, there were two violations and one violation of environmental regulations in Japan and other countries, respectively, each of them minor. No fines are imposed and they have all been resolved.
There were no major environmental accidents which might pollute the environment on the boundary of our site during this period.


Addressing Soil and Groundwater Contamination

Komatsu has established guidelines for testing soil and groundwater, inspects any business unit that is scheduled to be sold, closed, or removed pursuant to laws and regulations, and takes purification measures upon confirmation by local authorities if contamination is discovered.
We voluntarily investigate business units in operation in order to test for contamination stemming from VOCs in cleaning solvents, etc. used in the past.
We have been surveying soil and groundwater for VOC contamination at domestic business units since 2005, and have implemented countermeasures at any sites that have been found to be contaminated. We use methods that facilitate the cleaning process in the shortest period of time possible.
Our clean-up of the Oyama Plant was completed in FY2009. We are continuing clean-up operations at other sites while checking the effect of our cleaning measures.
We will continue to thoroughly clean-up and regularly monitor groundwater at site boundaries to ensure that there is no outflow of groundwater that has exceeded the standard outside the premises.

Status of Soil and Groundwater Cleanup in Japan

Business unit Cleanup method Cleanup status
Awazu Plant

Excavation and removal, soil vapor extraction, groundwater withdrawal and aeration, bioremediation

In process

Komatsu Plant
(former site)

Excavation and removal, groundwater withdrawal and aeration, bioremediation

In process

Osaka Plant

Soil vapor extraction, air sparging, groundwater withdrawal and aeration, bioremediation

In process

Shonan Plant

Excavation and removal, groundwater withdrawal and aeration

In process

Tochigi Plant

Excavation and removal, bioremediation

In process

  1. Bio-remediation is a purification process whereby hazardous materials are purified using micro- organisms. This return the soil to a non-hazardous state.
  • Investigative surveys revealed zero contamination in the Koriyama Plant, Technology Innovation Center in Hiratsuka, Techno Center in Izu and Field Testing Department in Oita.
env, production division

Managing PCB (Polychlorinated Biphenyl) Waste

Komatsu stores and disposes of PCB-containing waste (such as transformers and fluorescent stabilizers) in accordance with the "Act on Special Measures concerning Promotion of Proper Treatment of PCB Wastes" and the "Waste Management and Public Cleansing Law".
We intend to continue our appropriate treatment of PCB waste, including low-concentration PCB waste, according to our plan.


Management of Chemical Substances and Pollution Prevention


Management of Chemical Substances and Pollution Prevention

Reducing the amount of PRTR-related substances

In FY2020, the number of PRTR* substances with a handling volume of 1 ton or more (0.5 tons or more for Class I Designated Chemical Substances) was 25, a reduction by one, compared to the previous year.
The PRTR substances xylene, ethyl benzene and toluene account for approximately 90% of the emissions from Komatsu and Komatsu Group production sites. Most of these emissions are released into the atmosphere.
In FY2020, the volume of xylene, ethyl benzene and toluene fell from FY2019 levels despite increased production volume due to the ongoing switch to paints and thinners that contains less PRTR Class 1 substances at each site.
We will continue to make efforts to switch to paints that contains less PRTR Class 1 substances, introduce high solids thinners and paints, improve coating efficiency, reduce coating film thickness, and recycle paint thinner. Emissions in FY2020 were reduced by about 15% from the previous year.

  • PRTR: Law designed to mandate the disclosure of the amount of specific chemical substances released into the environment to promote the management of such substances (The notification system based on the PRTR Law)
env, production division

Breakdown of the Amount of PRTR-related Substances Released and Transferred from Komatsu Group Manufacturing Facilities in Japan

Komatsu Group Manufacturing Facilities in JapanIndependent Practitioner's Assurancecheckmark

  • Totals may not match exactly due to rounded decimals in individual categories.

Amount of PRTR-related Substances Released into the atmosphere

Komatsu Group Manufacturing Facilities in JapanIndependent Practitioner's Assurancecheckmark

Note: Partially revised as a result of revisions to past data.
env, production division

Reducing VOC Emissions

The majority of VOC emissions are from VOCs contained in paint such as xylene and ethyl benzene.
Emissions in FY2020 were reduced by 5.9% compared to the previous year, and we have managed to maintain a 50% reduction (compared to FY2005) in the amount of VOC emissions per unit of manufacturing value.

Amount of VOC Released

Komatsu Group Manufacturing Facilities in JapanIndependent Practitioner's Assurancecheckmark

Note: Partially revised as a result of revisions to past data.
env, production division

Reducing the amount of coating used by automating coating lines for large parts

Reducing the amount of coating used by automating coating lines for large parts

In FY2019, at the Awazu Plant, large frames were coated by hand in the past. They have started coating them on an automated coating line, which has reduced coating material consumption drastically.
Automation had been difficult because different large parts are attached for each customer, requiring the coating to be appropriate for each shape, and also because seasonal changes in temperature made it difficult to adjust the coating conditions. To introduce the new equipment, we performed several improvements. First, we installed a booth to pre-heat parts to adjust to the temperature changes. We also started controlling the temperature of the coating materials. Second, we placed the robot so it would be able to always coat from the same direction by rotating the part being coated, etc. Those improvements enabled us to introduce the automated coating line.
In the past, humans would accidentally recoat areas, which makes the coating film thicker. The introduced robot can consistently spray the same amount of coating, which has realized a constant coating thickness, preventing the waste of the sprayed coatings. Consumption of coating was reduced 47% after the introduction of the robot. Moreover, the automated line also reduced the amount of coating adhering to the walls of the coating booth, improving cleaning and maintenance as well.

Frame coating with the coating robot
komatsu csr, env, corporate communication, 情報戦略本部, production division, Procurement Division, Development Division, Construction Equipment Marketing Division, ライフサイクル事業部

Reducing the Use of Substances of Environmental Concern and Complying with the EU REACH Regulation


Reducing the Use of Substances of Environmental Concern and Complying with the EU REACH and SCIP Regulation

Komatsu is aware of the harmful environmental impacts that certain materials possess, and has made continuous efforts from an early stage to reduce the use of a number of such substances. These included asbestos, lead, and other such items. In FY1999, we created our own list of banned and limited-use substances (Refer to “Substances of Environmental Concern Banned or to Be Reduced for Use in Products”), which was based in part on Japanese legislation (Japanese Law Concerning the Examination and Regulation of Manufacture of Chemical Substances Control) that banned a number of chemical materials as well as regulatory measures in other countries.
We have also implemented more stringent measures in the control of substances that raise environmental concerns. In compliance with REACH*1 and SCIP*2, we began revisions of our FY1999 listing of banned and limited-use substances. We have also collaborated with suppliers to create a regulatory system that strengthens control of potentially harmful materials being used for production. We have rolled this system out in Japan and Europe, with plans to continue implementation in other areas of operation.
Through the use of this system, we identify SVHC (substances of very high concern) in not only vehicles for export to the EU or produced at local EU companies, but also in vehicles currently in production and in newly developed vehicles. Furthermore, we also regularly check for new SVHCs to be added to the list.
There are currently 211 SVHCs registered, with the list being revised every six months. We expect this number to increase to about 1,500 in the future. We have also devised a workflow to monitor control of these substances.

Control System for Substances of Environmental Concern

Substances of Environmental Concern that are Banned, or are to see Reduced Use in Production

Rank Number Chemical Substance


  • Hexavalent Chromium
  • Cadmium
  • Mercury
  • Tri-substituted Organostannic Compounds
  • Sulfur Hexafluoride *4
  • PCB
  • Asbestos
  • Specified CFCs/Alternative CFCs (HCFC)
  • Trichloroethylene
  • Triethanolamine
  • Hexachlorobenzene
  • PFOS (Perfluorooctane sulfonate)
  • RCF (Fire-Resistant Ceramic Fibers) (Alumina and Scilica Types) *4
To be reduced
(Subject to
limited use)


  • Lead
  • Arsenic
  • Selenium
  • Alternative CFCs (HFC)
  • Specified phthalate ester (DEHP/DBP/BBP/DIBP) *3
  • Specified Chlorinated Flame Retardents (TCEP)
  • Polycyclic Aromatic Hydrocarbons (PAH)
  • Methanol
  • DZ
  • BNST
  • DOTE
  • UV327
Substances of
Very High
(SVHC) under


Komatsu controls the use of the following substances, which might be used in Komatsu products.

  • DEHP/DBP/BBP/DIBP etc (5 substances)
  • RCF
  • Specified Lead Compounds
    (4 substances)
  • DOTE
  • UV327
  1. REACH: EU regulations for the Registration, Evaluation, Authorization and Restriction of Chemicals
  2. SCIP (Substances of Concern In articles as such or in complex objects (Products))
  3. Diethylhexyl phthalate, dibutyl phthalate, benzyl butyl phthalate, diisobutyl phthalate
  4. Review for stricter limits due to regulatory trends.
  5. The number of substances registered up until May, 2020 (progressively updated). Includes materials that are not contained in Komatsu construction equipment.
We are reducing and ending our use of substances of environmental concern. One of our efforts to achieve this is our plan to replace components containing specific phthalate esters with alternatives by 2024.
komatsu csr, env, corporate communication, 情報戦略本部, DFF Inc., production division, Procurement Division, Development Division, Construction Equipment Marketing Division, ライフサイクル事業部


NOx and PM Emitted from Products

To reduce the NOx (nitrogen oxide) and PM (particulate matter) contained in the exhaust gases of diesel engines, which are used in construction equipment and other machinery, new emission control regulations have been established, and we have been developing products that emit cleaner exhaust gasses. About 85% of the construction machinery manufactured in FY2020 complies with regulations equal to or more stringent than U.S. Tier 3 and EU Stage IIIA regulations. As a result, the average NOx and PM emitted by the construction equipment products produced by Komatsu are shown below:

Average emission value of NOx and PMIndependent Practitioner's Assurancecheckmark


Water Related Risk Management


Komatsu's Efforts Regarding Water

Due to climate change, population growth and other phenomena brought by global warming, risks of river flooding, droughts, water shortages and other water-related problems have surfaced all over the world and are becoming more serious every year.
The Komatsu Group respects the right to water and sanitation as important rights. We also fully understands that we depend on that water and our business operations are influenced by and exert influence on the quantity and quality of that water.
Therefore, we engage in production activities that minimize environmental impact, provide good products and services and take appropriate actions to mitigate water-related risks in an effort to conserve local water resources and ensure that the water stays safe. It is our goal to promote these activities at All Komatsu and lead to the conservation of the global environment.

Basic Initiatives

  1. In our production activities, to reduce water consumption in cleaning and other processes, we set objectives and are continually carrying out water reduction activities. In addition, we promote the introduction of water circulation systems that collect used water for recycling at selected bases to increase the efficiency of water use. When returning the water discharged from production and sales bases to nature, we dispose of it in compliance with national and regional laws and regulations and also the management standards we have established.
  2. Using construction machines equipped with ICT and other advanced technologies, we contribute to measures mitigating water-related risks such as safe and efficient shore protection work and disaster-relief work.
  3. We regularly carry out water-related risk surveys at our production bases, sales bases, and suppliers and take appropriate measures to mitigate risk.
  4. We provide quality drinking water and sanitary services to those involved in our business, including the local community.
  5. We learn about water together with stakeholders to raise our awareness of water and our responsibilities and aim to realize better a society of coexistence and cooperation.
  6. We carry out water-related initiatives and proactively disclose achievements.

Through these initiatives, we contribute to the SDGs, a set of common goals for the world.

Actions Against Water-related Risks

Based on the Komatsu Earth Environment Charter, the Komatsu Group has promoted the reduction of water usage and recycling and has carried out activities, mainly for the protection of water quality. In FY2020, we conducted a water-related risk survey at our 76 main offices in Japan and other countries, irrespective of whether they handle production. In this survey, we conducted (1) versatile and objective identifications of water-related risks using WRI Aqueduct, and (2) subjective awareness surveys of water-related risks that Komatsu considers to be important. Combining these two surveys, we expanded the scope of the water-related risk survey and increased its accuracy. The water-related risk survey showed that Komatsu Group had some areas facing risks of disasters such as heavy rains, river flooding and tsunami (including risk awareness to the supply chain) .
Going forward, we will conduct a water-related risk survey on a regular basis to keep updated on the water-related issues of the Komatsu Group.

Water stress risk survey by area (FY2020)

Using WRI Aqueduct, we surveyed 34 main production bases of the Komatsu Group about water stress risks in the water resource usage required for their production activities, such as clean water (tap water/city water), industrial water (clean water for industrial use), and well water. We corrected the results from WRI Aqueduct based on unique evaluations of the specific business locations.

The business locations whose water stress risks were rated as high or middle-to-high account for 10% of our water usage. While approximately 67% of the water used by Komatsu as a whole was well water, we found that all of the water used in the business locations with high or middle-to-high water stress risks was clean water and that water usage reduction and water recycling are important for securing water resources in these areas.

Water stress risk survey by area (FY2020)
Water stress risk survey by area (FY2020)
Water stress risk survey by area (FY2020)

We will effectively use these survey results for activities we have conventionally engaged in, such as the promotion of water usage (input volume) reduction and recycling, aiming to reduce the water-related risks the Komatsu Group is exposed to. In addition, when planning the construction of a new business base or the transfer of a base, we will survey water stress in that area to identify the risk level.

Domestic Case Studies (Oyama and Tochigi Plants)

We have initiated the construction of multiple safety measures against the risks imposed by heavy rain. These include the building of three reservoirs (capable of holding up to an hour's worth of 100mm/h rainfall), installation of heavy rainfall water pipes, the construction of underground reservoirs, and the widening of rainwater drainage ways. In addition to this, we have installed water block walls and stop bars to prevent water from flowing outside of the premises.

* Our reservoirs also serve to alleviate the surrounding district's lack of drainage capacity.
Current Status of Reservoirs:

  1. Oyama Plant 20,000 ton 10,000 ton and 4,000 ton reservoirs (completed)
  2. Tochigi Plant 12,000 ton reservoir (under construction)

International Case Studies (KI: Komatsu Indonesia)

The following measures have been implemented to prevent the entry of river flood water into KI premises.

  1. Installation of concrete wall
  2. Installation of emergency door for employees
  3. Installation of floodgate
  4. Installation of new drainage system
  5. Installation of drainage gate
  6. Installation of pump for floods

We have engaged elements of our supply chain to collaborate with our water-related risk initiatives. Our “Water-Related Risk Survey” was conducted at the operations of one of our main supply chain companies (Midori-kai). Komatsu is proud to report that as of FY2017, Midori-kai has begun collaborative efforts in our “Water-Related Risk Reduction Activities”.


Environmental Audit of affiliate companies in Russia and China


Compliance and Risk Audit at overseas group companies

Komatsu has been conducting planned compliance and risk audits (CR audits) since fiscal 2007 for risk prevention at overseas group companies.

In FY2020, we had planned to conduct audits in Europe and the United States. However, COVID-19 made it impossible to visit sites to audit them. In Europe, we used an online meeting system to remotely audit KUK. Audits in the United States were postponed to the next fiscal year due to time differences. Audits are performed with the support of domestic mother plants. Remote auditing does not enable us to see what is happening at the site. We used the check sheet in our fact finding about the sites, as is done in a typical audit. In addition, we gathered many different documents about the results of water tests and the administrative procedures of local affiliates before beginning the audit. We also conducted a paper audit and an interview-based audit. As a result of the audits, we detected no major problems that could lead to the realization of an environmental risk. They were proactive about activities reducing environmental impact. We continue to carry out follow-ups checks at areas where audits have already been completed, and plan to conduct further environmental audits of our group companies in other regions.

Past Environment Audits

Year Area Year Area




United States and Brazil





Thailand and Indonesia


India and Indonesia




Russia and China




Indonesia and Brazil


Russia and Czech Republic


China and the United States

2013 United State 2020 Europe

Holding Regional Environment Meetings

At overseas business units, employees in charge of the environment and safety in each region gathered to hold meetings. By exchanging information of and discussing common issues in the region, they aim to improve compliance and the level of the environmental impact reduction activities at each business unit. Meetings in FY2020 were held in North America, Latin America, Europe, Southeast Asia, Oceania and China. In most of these regions, meetings were held online due to COVID-19. These meetings were all attended by many participants who reported on their companies’ environmental activities. Through activities like this, we would like to further revitalize the environmental activities of the Komatsu Group.