Conservation of Water Resources

Due to the increasing population and changes in the natural environment caused by climate change, water supply and demand are becoming tighter in more regions, and social concern for the preservation of water resources is increasing.
The MITSUBISHI MOTORS Group requires a large amount of industrial water, city water, and groundwater, and the like for automobile production and it discharges water into sewage lines and rivers, etc. In regions with high water risk, it is essential to consider the impact that water withdrawal and discharge from our business activities have on the surrounding environment.
At each plant, we comply with various legal requirements, such as the one on the quality of discharged water. In addition, we work to reduce water withdrawal amounts and introduce water recycling technologies based on the status of water resource management in each country and region.
Water is required for the operations of our business partners. We are aware of the importance of water risk management throughout the entire value chain.

We are striving to reduce water withdrawal volumes by reusing washing water used in production processes for pre-washing and by circulating cooling water and temperature control water.
At the Okazaki Plant and at PT Mitsubishi Motors Krama Yudha Indonesia (MMKI), we have set up rainwater storage tanks in order to reuse rainwater. At the Okazaki Plant, we have also set up equipment to filter groundwater so that it can be used to supply drinking water to employees and those who live nearby, in case any disasters occur.

Please refer to the following section for topics related to the reduction of water withdrawal volume.

The MITSUBISHI MOTORS Group has introduced wastewater recycling technologies, taking into consideration the situation regarding water resource management at each facility location.
Currently, discharged water recycling plants are operational at PT Mitsubishi Motors Krama Yudha Indonesia (MMKI) and Mitsubishi Motors (Thailand) Co., Ltd. (MMTh).MMKI has been utilizing awastewater recycling plant since its establishment in 2017.
In FY2024, its wastewater recycling rate reached 75%. MMTh put its wastewater recycling plant into operation in January 2022, and in FY2024, its wastewater recycling rate was 79%.

To prevent water pollution in areas surrounding plants, we measure and manage the quality of discharged water based on legal requirements. We also conduct surveys and confirmations regarding the quality of groundwater and soil pollution. In this way, we confirm that no toxic substances are being discharged to the outside area. In order to quickly detect abnormalities in discharge water quality due to such factors as rainfall, we set up a surface oil detector(*) in front of outlets leading from the plant to public water and continuously monitor discharge water conditions. We carry out continuous monitoring so that water discharged from the plant does not affect the environment outside the site. In the event of an accident, we respond quickly to prevent pollution from spreading, report to the local authorities and disclose information to the community.