CO₂ emissions

In FY2022, production at our main plants, the Omuta Plant and the Chiba Plant, was reduced, resulting in a significant reduction in CO₂ emissions.
In FY2023, we will continue to focus on reducing emissions through energy saving initiatives at each of our manufacturing plants and the efficient operation of our power plants.

Trends in “Production Volume and Energy Consumption Intensity” and “CO₂ emissions intensity (from energy resources)”

In FY2022, production at the Omuta and Chiba Plants was severely reduced, resulting in a decline in company-wide production, and the impact of the suspension of hydroelectric power plant construction and other factors led to a deterioration in energy consumption intensity compared to the previous fiscal year.
In FY2023, following the revision of the Energy Conservation Act, we will focus on further energy conservation efforts while continuing to conserve energy at each of our manufacturing plants and operate our power plants at high efficiency in order to make the transition to energy management including non-fossil energy.

PRTR Substances Emissions

In FY2023, we expect a slight increase in emissions due to an increase in the number of target substances, among other factors, but we will continue to make systematic efforts to reduce emissions, focusing on reductions in atmospheric emissions.

Final waste disposal volume and emission rate of domestic group companies

In FY2020, the Gosen Site (formerly Denka Seiken) was added to our list of stand-alone facilities and as a result of processing waste from the site in the cement kiln at the Omi Plant, the emission rate for the entire Group has remained low.

SOx Emissions

In FY2022, emissions remained generally the same as in previous years.

Soot and Dust Emissions

In FY2021, the coke dryer's filter cloth performance temporarily declined. However, following replacement of the filter cloth, emissions were brought back to the same level as in previous years and were maintained.

NOx emissions

In FY2022, emissions increased due to the increase in operating hours of our cement kilns. In FY2023, we will continue efforts to reduce emissions by further optimizing operations and other measures.

COD (BOD)

In FY2022, operation rates increased and COD trended upward. Although the operation rate is expected to increase further, we will strive to maintain the status quo by optimizing operations.

Water Used

Breakdown of emissions and transfers in fiscal 2022

The following table shows PRTR substances emitted and transferred exceeding one ton.

Scope of Calculation for Fiscal 2022 Results