Introducing a classifying machine enables to provide industrial calcium carbonate products with acute particle size distribution, the Ohtakine Factory can support a wide range of the customers’ demands. The factory serves as a producer of limestone powder, which removes the sulfur oxides (SO_x ) contained in combustion exhaustion gases that are expelled from power plants.
The factory has acquired ISO9001 certification, and provides higher quality products with more stability.

The Ohgoe Factory uses limestone cut from the Shin-takine Mine, same as the Ohtakine and the Kanmata Factory as its source for producing calcium carbonate products mainly for use in building materials and roads.

The Kanmata Factory produces primarily Hakuryu crushed stones and calcium carbonate products for industrial use, making annual shipments of 70,000 tons.

Positioned in Hitachiota City, Ibaraki Prefecture, the Mayumi Factory's main products are feed products, along with calcium carbonate for industrial use.