Advantest and its consolidated subsidiaries manufacture and sell semiconductor and component test system products and mechatronics-related products such as test handlers and device interfaces. Co. also engages in research and development activities and provides maintenance and support services associated with these products. Co.'s principal business segments are semiconductor and component test system; mechatronics system; and services, support and others. Product lines include test systems for memory semiconductors and non-memory semiconductors; test handlers, mechatronic-applied products, and for handling semiconductor devices.

DISCO and its affiliates are mainly engaged in the manufacture, sale and maintenance of precision cutting, grinding and polishing machines. Co. is also engaged in the manufacture and sale of precision diamond abrasive tools, and disassembly and recycling of precision cutting, grinding and polishing machines. Co.'s principal precision machines are dicing and cutting saws, laser saws, grinders, polishers, wafer mounters, die separators, surface planers, water jet saws, and products for new processes. Co.'s principal precision processing tools are dicing blades, grinding wheels, and dry polishing wheels.

IBIDEN is an electronics related business group based in Japan. Co. operates in two business segments: Electronics segment manufactures and sells printed wiring boards ("PWBs") and package substrates; and Ceramics segment manufacture and sells environment-related ceramics products, graphite specialty products, and ceramics fiber. In addition, Co. manufactures and sells housing equipment and melamine decorative laminates; designs and constructs slopes, garden landscape and environmental facilities. Co.'s other business activities include synthetic plastic processing; agriculture, livestock and fishery processing; oil products sales; information services; automobile transportation and others.

Screen Holdings is a holding company. Co., through its subsidiaries and associated companies, is engaged in the manufacture and sale of semiconductor manufacturing equipment, printing-related equipment, printed-circuit board-related equipment and flat panel displays ("FPDs") manufacturing equipment. Co.'s principal products include single wafer cleaner, wet station, scrubber and laser annealer, full-color variable printing system, thermal plate recorder, direct imaging system, automatic optical inspection system, automatic final visual inspection system, coater/developer, LIA plasma CVD/sputter equipment, coater/dryer, coater/developer for LTPS and others.

Tokyo Ohka Kogyo is mainly engaged in the manufacture and sale of materials for electronics. Along with its subsidiaries and associated companies, Co. operates in two business segments: material and equipment. Material segment is engaged in the manufacture and sale of electronics functional materials and high purity chemicals. Equipment segment is engaged in the manufacture, sale and maintenance of process equipment for liquid crystal display ("LCD") panels and semiconductor manufacturing equipment. As of Dec 31 2017, Co. maintains five plants in Fukushima, Shizuoka, Kumamoto, Tochigi and Saitama, Japan, as well as its logistics center in Kanagawa, Japan.