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.
The Cosmo Energy Group has continued to work on waste reduction by setting the group-wide final disposal rate in fiscal 2023-2025 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 2025, the Cosmo Energy Group’s waste production was145,377 tons, the amount recycled was 35,646 tons, and the final disposal amount was 283 tons. As a result, the group surpassed its target with a final disposal rate of 0.19%.
Please refer to ESG Data：Resource recycling（waste） for details of Waste generated, and Final disposal rate.
From Used Cooking Oil to Aviation Fuel
In 2022, Cosmo Oil Co., Ltd., JGC HOLDINGS CORPORATION, and REVO International Inc. jointly established a new company, SAFFAIRE SKY ENERGY LLC, marking the first commercialized initiative in Japan to build an end-to-end domestic supply chain — from the collection of used cooking oil (UCO) to the production, transportation, and supply of Sustainable Aviation Fuel (SAF).
Targeting an annual SAF production of approximately 30,000 kiloliters, derived solely from used cooking oil generated in Japan, construction of the SAF production unit at Cosmo Oil's Sakai Refinery (Sakai City, Osaka) was completed in December 2024, and supply to airlines began in April 2025.
For more information on the Cosmo Energy Group's SAF initiatives, please visit our dedicated website.
Water Risk
Group Operations and Regions with Water Stress
As of July 2025, 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 water intake restrictions at any of our refineries, we believe that the impact on our business operations is minimal. Each refinery receives industrial water based on a contract with the local government, and works to use water resources efficiently through appropriate management of the contracted water volume and the use of recycled water.
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 2025 was 570,343,000 tons, which breaks down into 509,627,000 tons of seawater (89% of total), 59,921,000 tons of industrial water (11%), 314,000 tons of municipal water (0.06%), and 481,000 tons of groundwater (0.08%).
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