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 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 Eletronic 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.