Diamond Electric Holdings Co., Ltd. engages in the management of its group companies which handles the manufacture and sale of automotive and electronic equipment. It operates through the following segments: Automobile Equipment, Energy Solutions Business and Electronic Equipment. The Automobile Equipment segment manufactures and sells ignition coils for gasoline engines, mission switches, rotation sensors, and in-vehicle control boards. The Energy Solutions Business segment manufactures and sells power conditioners for solar power generation and energy storage hybrid systems. The Electronic Equipment segment produces and markets electronic control equipment for fan heaters, air conditioners, water heaters. It also sells electronic ignition devices and power conditioners. The company was founded on October 1, 2018 and is headquartered in Osaka, Japan.