Manufacture, repair, and sale of railway signal safety devices electrical equipment and other mechanical devices. Installation and repair of railway signal safety devices and electric equipment and devices. Information processing business that used computers and relating devices. Plating and coating of equipment and devices listed above, metal products, transportation machinery and equipment, precision machinery and equipment, ornaments and toy parts. Manufacture, processing, and sale of synthetic resins (ABS resin, acrylic resin, diallylic resin, etc.) related to the items listed above. Staff dispatch service activities related to the items listed above. All business activities related to the items listed above. Investment in or promotion of other companies within the limits of the law.