Nippon Seiki Co., Ltd. manufactures and sells instruments for automobiles, motorcycles, agricultural and construction machinery, and marine use, operating in Japan, the Americas, Europe, and the rest of Asia. Its products include instrument clusters, head-up displays, various sensors, automotive EMS with high-density PCB mounting, and aftermarket products such as link meters and multi-digital displays under the Defi brand, along with plastic optics design and manufacturing services. The company also offers household appliances, office automation equipment, and factory automation equipment, and is involved in automobile sales, inspection and repair, car rental, resin material processing and sales, logistics, customs clearance, food, insurance and advertising agency services, and information systems and software consulting. Incorporated in 1946, it is headquartered in Nagaoka, Japan.