SUMISEKI HOLDINGS,INC. · 住石ホールディングス株式会社

Sumiseki Holdings Inc is a Japan-based holding company primarily engaged in the coal business. It operates through three segments. The Coal segment is engaged in related transactions related to the purchase and sale of coal. The New Materials segment is engaged in the manufacture, purchase and sale of industrial artificial diamonds. The Quarrying segment is engaged in the extraction, processing and sale of rocks. Employees 39 Sector Coal