At Mombetsu Biomass Electric Power, incinerator ash emitted by the biomass boiler is used to manufacture foundation fill material (product name "Rovander") for forest roads. This environmentally-conscious product is aimed at building a cyclical operation in which the amount of waste is controlled, reducing environmental impact by helping maintain forests using a by-product of power generated with forest resources. In addition, this Rovander has been recognized as meeting environmental safety standards, and is a Hokkaido Government-certified Recycled Product.

The overall recycling rate for the power generation business was 95.1% in fiscal 2023 and increased to 96.8% in fiscal 2024.