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Co., Ltd., a wholly-owned subsidiary, in January, 1986, and development work was begun. Construction proceeded in accordance with a detailed plan. The monthly production goal of 1 million m3 (1.7 million ton) was reached after 18 months later. The basic policy for development was as follows. 1. The latest technology was employed to the greatest extent possible to create a highly productive quarry on the largest scale in the shortest time. 2. Under planned investment, activities to protect safety and prevent environmental polution were carried out. 3. Large-scale facilities were installed, Central Control System and the Production Administration System

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