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Our Business

Workplace of working face
TTorigatayama Quarry Complex
Honeycomb core
Inorganic fiber paper
Shiriya Quarry Complex

Limestone is the main product of the Resources Division of our company. Limestone is sedimentary rock that is formed by deposits of the bones and shells of sea creatures, such as coral, that has accumulated on the bottom of the sea for hundreds of millions of years, then upheaved to the surface by crustal movements.

Though our country is said to have few natural resources, limestone is an underground resource enabling to boast that self-sufficiency is 100% and the domestic annual production is 150 million tons.

Our company has limestone mines in various places in Japan, such as the Torigatayama Quarry Complex in Kochi Prefecture, the largest mine in the country, and the Shiriya Quarry Complex in Aomori Prefecture, the Oita Quarry Complex in Oita Prefecture, and others. Our annual production, placing us among the top class in the domestic business world, is about 20 million tons. We supply domestic steel and cement manufacturers, and a portion is exported abroad to such countries as Australia.

In addition, our company has opened quarries in various places in the country, and supplies about 5 million tons per year of a variety of aggregates to users in the whole country, including group companies.

The main component of limestone is calcium carbonate, and from its characteristic, it is used as the main and sub-materials that are indispensable for raw material industry representing the country, such as steel and cement. It is also used in aggregates for civil engineering and architecture.

Furthermore, the application of fine powder (calcium carbonate) crushed from limestone is used widely, for such items as filler in asphalt, fertilizer, feed, glass, rubber, paper making, medical treatment, perfume, sugar refinement and food.
Limestone has become a mineral resource that is closely related to our daily living. In recent years, the need for environmental materials, such as desulphurization agents for power stations, waste disposal facilities and so forth, has increased.

Our company is responding to a variety of extensive needs as well as opening up new avenues of use with thorough quality control and full use of technologies accumulated over a long time.

The Resources Division of our company is tackling product development that uses mineral resources by exhibiting the technical capability cultivated over a long time as a resources company.

The main products that we are developing are inorganic papers (flameproof paper and calcium carbonate paper) made from inorganic fine particles. In co-development with Oji Paper Co., Ltd., these papers use such main raw materials as aluminum hydroxide and calcium carbonate. This inorganic paper has been launched onto the market with the trade name OK COSMO, and is broadly used for flameproof building materials, mainly wallpaper, metallic sizing, and so forth. Beside the sales of white limestone, quicklime, a film to keep freshness called Flora AceR , a paper shoe insole called Asheet, and so forth, there are other fine particle businesses being developed.

In addition, sales are being achieved for A´ŻąC heavy oil for marine fuel and lubricants through the business network; several kinds of fuel oil and other petroleum products for industrial use as the sales agent of ENEOS Corporation; as well as sales of imported coal, cokes, LPG and so forth for cement and salt manufacturing industry and other miscellaneous fields. From now on, our company will be concerned with every resource as a comprehensive resources company that supports all industries in Japan.

Considering that coexistence and co-prosperity with the natural environment and the community are essential for continuing business in the mining industry, our company is aggressively tackling global environmental conservation by reducing environmental mine pollution, reducing the environmental load and so forth by cooperating with the people living near our sites.

Since 1998, as a part of our global environmental conservation activities, we set out to acquire ISO14001certification for Environmental Protection, and all mines of this company acquired the certification by December 2001.

Every business establishment aims at helping the company become respectful of the global environment, by setting up energy-saving targets for fuel and electricity to reduce the environmental burden ? in turn promoting measures that reduce the rate of global warming - and makes every effort to save energy through environmental control activities. Also, in order to become a more recycling-based society, every business establishment carefully consumes things, water, electricity and oil to reduce waste.

Further, as a mining company which has been working with the underground materials for a long time, our company has started geoscientific research for technical developments by using our knowledge and experiences. This research covers geology, geophysics, rock mechanics, hydraulics and hydrology, as well as environmental protective study for the pollution of soil and underground water. For our corporate activities from now on, it will be necessary to take care for not only the regional environment but also the global environment.
Every business establishment will promote activities considering environmental issues such as energy saving, resource saving and the like.

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