Masumi Maeda

Diamond Electric Mfg. Co., Ltd. engages in the manufacture and sale of automobile equipment and electronic control parts for air-conditioners and water heaters. It operates through the following segments: Automotive Equipment and Electronic Equipment. The Automotive Equipment segment includes ignition and electric devices. The Electronic Equipment segment includes air-conditioner controllers, inverter modules, and eco cute controller. The company was founded by Inosuke Tomita on April 10, 1937 and is headquartered in Osaka, Japan.

Diamond&Zebra Electric Mfg Co., Ltd. engages in the manufacture and sale of transformers, power supplies, and various electronic components. It operates through the Transformers and Power Supply Equipment segments. The Transformers segment manufactures and sells transformers for industrial and consumer use. The Power Supply Equipment segment deals with various power supply devices and power conditioners. The company was founded by Shigeru Tabuchi in May 1925 and is headquartered in Osaka, Japan.