Resource Recycling Initiatives

Waste Reduction

To make more effective use of resources, the Cosmo Energy Group is reducing, reusing, and recycling resources such as water and energy, as well as waste in all stages of its business activities. Additionally, we have set voluntary targets to reduce the amount of waste generated and promote recycling.

Under the Consolidated Medium-Term Sustainability Management Plan, the Cosmo Oil Group (Cosmo Oil, Cosmo Matsuyama Oil, and Hokuto Kogyo) has continued to work on waste reduction by setting the group-wide final disposal rate in fiscal 2022 at 0.3% or less. This exceeds the Petroleum Association of Japan's target value of 1% or less for waste control and recycling measures.

In fiscal 2022, the Cosmo Energy Group’s waste production was 156,011 tons, the amount recycled was 40,629 tons, and the final disposal amount was 218 tons. As a result, the group surpassed its target with a final disposal rate of 0.14%.

Since fiscal 2018, Cosmo Engineering has focused on materials covered by the Construction Recycling Promotion Plan 2014 issued by Japan’s Ministry of Land, Infrastructure, Transport and Tourism. The company is working to lower its final disposal rate target from just under 15% to less than 4%. The final disposal rate for Cosmo Engineering is relatively high because the types and amounts of construction waste vary depending on the type of construction and contract work being formed. To help reduce waste, it separates debris, metal, glass, and other materials generated during building demolition. While the company continues to pursue resource recycle efforts, as of fiscal 2021, it has excluded three material types from these efforts, namely, sludge, mixed construction waste (stable type), and mixed construction waste (managed type). It has encountered problems with materials that cannot be recycled such as fiber-reinforced plastic (FRP) made outside Japan, as well as damaged or oil-stained materials that are difficult to sort.

Amount of Industrial Waste Generated, Amount Recycled, and Final Disposal Rate


  FY2022 targets FY2022 results
Final disposal rate Waste generated Waste recycled Final disposal amount Recycling rate Final disposal rate
Cosmo Oil <0.3% 59,570 18,189  14  30.5  0.02 
Cosmo Engineering <4% 3,427  3,427  0 100 0.00
Cosmo Oil Lubricants <1% 813  805  99.0 0.27 
Hokuto Kogyo <1% 7,158  7,116  99.4  0.05 
Cosmo Matsuyama Oil <1% 608  608  0 100 0.04 
Maruzen Petrochemical <1% 88,589  14,657  183  16.5  0.21 
Other Group companies - 85  59  18  69.4  21.5 
Group total <0.3% 160,251  44,862  221  28.0 0.14 

Water Risk

Group Operations and Regions with Water Stress

As of July 2023, based on information from the World Resources Institute’s (WRI’s) Aqueduct Water Risk Atlas, the Group does not operate in any areas with high water stress.

Drought Risks

The Group’s sites are all located in areas with relatively abundant industrial water supplies. Although there are still risks of potential water restrictions at any of our refineries, we believe that the risks to operations are minimal. The amount of industrial water used by each refinery is based on a contracted usage amount, and recycled water is also used.

Flood Risks

At its sites, the Group conducts assessments concerning drainage risk in the event of typhoons or torrential rains, and systematically maintains equipment to ensure adequate drainage to deal with any sudden heavy rainfall. Assessment has also been conducted concerning the risk of tsunamis, and we have confirmed that there are no issues facing our main facilities. Nevertheless, we are proceeding with the reinforcement of coastal docks based on estimated tsunami levels.

Water Intake, Discharge, and Usage

Of the Group’s total water usage, 89% is seawater. The vast majority of the freshwater used by the Group, or 99%, is obtained within Japan.

At its sites in Japan, water is used for cooling, cleaning, and boiler supply. The total amount of water pumped in fiscal 2022 was 560,447,000 tons, which breaks down into 498,295,000 tons of seawater (89% of total), 61,434,000 tons of industrial water (11%), 241,000 tons of municipal water (0.04%), and 477,000 tons of well water (0.09%).

All the Group’s refineries and plants are working to efficiently utilize recycled water by collecting and reusing wastewater.

The majority of the Group’s water use outside Japan is also seawater, and the entire amount of groundwater extracted during crude oil production is pumped back into underground aquifers.

Please refer to ESG Data for details of water intake, discharge, and usage at Group sites in Japan.


ESG Data: Water resource use and discharge – Water intake, discharge and usage

Discharge Measures (Volume and Pollution Prevention)

The Group’s refineries and plants use seawater as coolant, which is then discharged back into the sea. Freshwater used for cleaning and other operational processes is properly treated using pollutant control parameters that are stricter than legally required. The treated wastewater is then discharged with minimal environmental impact. The regulatory limits for wastewater pollutants use daily limits. In the event that a pollutant level exceeds the regulatory limit, we promptly report it to the government and take immediate measures to bring the level below the required limit.


ESG Data: Water resource use and discharge – Wastewater treatment / Water pollution loads