Toshihiro Kaihoshi

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.

Tecno Electric Industry Co., Ltd. manufactures electric components and devices. It specializes in transformers, electromagnets, field coils, and control equipment. The company was founded on November 27, 1950 and is headquartered in Hadano, Japan.

Part of Diamond Electric Holdings Co., Ltd., Shanghai Tabuchi Transformer Co., Ltd. is a company that manufactures electronic coils and transformers. The company is based in Shanghai, China.

Part of Diamond Electric Holdings Co., Ltd., Thai Tabuchi Electric Co., Ltd. is a company that manufactures and supplies transformers and power supply units. The company is based in Chachoengsao, Thailand.