Mitsui Chemicals

Environmental Protection


Basic Philosophy on Water Resources

  1. We recognize that water is a finite and precious resource, and regard water conservation as a key priority on a global scale.
  2. We make every effort to use water efficiently as we recognize quality water resources are crucial to our operations.
  3. We appropriately manage water on a case-by-case basis for each country and region in which we operate, in recognition of the fact that water resources distribution varies both geographically and temporally.

Water is an indispensable component of the Mitsui Chemicals Group’s various chemical product manufacturing processes. For example, water is used in manufacturing processes that include heating, cooling, and washing as well as for equipment that removes harmful chemical substances produced during these processes and discharges effluent.
Formulating its basic philosophy on water resources, the Mitsui Chemicals Group works to manage efficient water usage and water preservation. In addition, the Group works to determine the water usage activities of suppliers through Sustainable Procurement SAQ that it asks them to fill out regarding the following items: “Control and reduction of waste water, sludge and air emissions” and “Sustainable and efficient utilization of resources (energy, water, raw materials, etc.).”

Reducing Emissions of Water Pollutants

We monitor the emission volumes for water pollutants such as chemical oxygen demand (COD), nitrogen and phosphorus, to conserve water quality.
The emission volumes for each of these items are kept significantly lower than levels required by law or other legislation.

Total nitrogen emissions (Mitsui Chemicals, Inc.)

Total nitrogen emissions (Mitsui Chemicals, Inc.)

Total phosphorous emissions (Mitsui Chemicals, Inc.)

Total phosphorous emissions (Mitsui Chemicals, Inc.)

COD, BOD emissions

COD, BOD emissions

Efficient Use of Water

The Mitsui Chemicals Group monitors the volumes of water withdrawal, discharge, consumption, and recycling in an effort to use water efficiently. The Group proactively engages in water recycling particularly at production facilities that use large amounts of water.

Volume of water withdrawal (tap water, groundwater, industrial water, and seawater)

Breakdown of volume of water withdrawal (FY2017)

Discharge water volume


Water consumption*

Water consumption:
Difference between water withdrawal and discharge water volume .

Water recycling volume and ratio


Scope of Mitsui Chemicals, Inc.: Parent company production sites and the Sodegaura Center
Scope of domestic and overseas affiliates: Production sites operated by consolidated subsidiaries and affiliated companies eligible for Responsible Care support

Water Risk Assessments

The Mitsui Chemicals Group conducts water risk assessments at each of its production facilities.
Water risks at each Group production facility from now through 2040 are assessed using World Business Council For Sustainable Development’s (WBCSD) Global Water Tools and the World Resources Institute’s (WRI) AQUEDUCT Water Risk Atlas. For production facilities deemed to be high risk based on these tools, detailed assessments are conducted involving local data, production facility unit water levels/usage volumes in order to verify low-risk areas. In addition, similar surveys are conducted at new plants when operations are commenced.
As part of assessing biodiversity and water risks, IBAT* is used to gather data and investigate these risks based on the following evaluation items: Protected areas, priority protected areas, endangered species, and endangered freshwater species surrounding production facilities.

Integrated Biodiversity Assessment Tool. Developed jointly by BirdLife International, Conservation International, International Union for Conservation of Nature (IUCN), United Nations Environment Programme (UNEP), and UN Environment World Conservation Monitoring Centre, IBAT facilitates access to basic data and the latest information on natural preservation.