Conservation of water resources

Towards Value Creation

　We strive to ensure the appropriate use of water resources at the Taiheiyo Cement Group's cement plants by analyzing water risks and understanding water usage, as water-related challenges may arise in the future.

Policy and Operational System

　We have positioned proactive efforts toward natural resources capital, such as the conservation and recovery of water resources, as an important management challenge in our environmental management policy and are aiming to achieve a nature-positive society. In addition, we are conserving water sources in accordance with GCCA guidelines.
　At the Taiheiyo Cement Group's quarries, we are also working to conserve water resources such as rivers and springs. From the viewpoint of water resource conservation, spring water and rainwater are discharged after passing through a regulation pond to minimize the impact on the external environment. In some quarries we drill wells for domestic water and supply this water to local communities for everyday use.

Risk Management

　An analysis of water risks at the Taiheiyo Cement Group's cement plants using the Water Risk Filter (WRF) shows an average basin physical risk score of 2.38, weighted by cement production volume across all plants, with the highest score being 3.14 for one particular plant. In addition, from FY2025, we have revised the evaluation accuracy with a focus on water basin physical risks to better understand the impact on the environment. In the analysis of the situation of plants with high evaluation points, no urgent challenges have been found, and we will continue to strive for the appropriate use of water resources.

* A tool developed by the World Wide Fund for Nature (WWF) to assess physical risks and business risks in water resource basins, with the highest evaluation point of 5.0 indicating the greatest risk.

　Most of the water used at our cement plants is for the cooling of equipment, exhaust gas and on-site power generators. Therefore, the water discharged from the plants is mostly cooling water, which is not polluted as defined in the Water Pollution Control Act. All the fresh water used at the plants is circulated and reused, except for the household wastewater, as we strive to reduce our water withdrawal and lessen the impact of wastewater on bodies of water. Seawater is used to cool on-site power generation facilities at our plants near the ocean and then released back into the sea after use.
　Our total fresh water used in FY2025 was about 11.43 million m³ and our fresh water used to produce one tonne of cement was 0.431 m³. Most of this freshwater is not used as a raw material for products, but is used for cooling equipment and gas and is then evaporated.