Tamagawa Holdings Co., Ltd. engages in the manufacture and sale of wireless equipment, measuring instruments, information equipment, and industrial equipment. Its operations are carried out through the following segments: Electronics and Telecommunications Equipment, Renewable Energy System Sales, and Renewable Power Plant. The Electronics and Telecommunications Equipment segment develops, manufactures, and sells attenuators, splitters, couplers, switches, filters, optical-related electronic equipment, and millimeter wave products. The Renewable Energy System Sales segment sells photovoltaic modules and power conditioners. The Renewable Power Plant segment develops solar power plants and sells power generated by the power plants to electric companies. The company was founded in November 1968 and is headquartered in Tokyo, Japan.