Nitto Boseki Co Ltd is principally engaged in the electronic materials business, medical business, composite materials business, materials and chemicals business, insulation materials business, and other businesses. The Company operates in six business segments. The Electronic Materials segment develops, manufactures, and sells glass fiber products for electronic materials. The Medical segment develops, manufactures, and sells in-vitro diagnostic reagents. The Composites segment develops, manufactures, and sells glass fiber products for plastic reinforcement materials. The Materials and Chemicals segment develops, manufactures, and sells glass fiber products for industrial materials, chemical products, interlining products, functional materials, and dishcloths. The Insulation Materials segment develops, manufactures, and sells glass wool products for insulation, heat retention, and sound absorption. The Other segment designs industrial machinery and equipment.