Yoshiaki Hirota

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.

TDK-Lambda Corp. operates as a global power supply company that provides reliable power supplies for industrial equipment worldwide. It also engages in designing, manufacturing, sales and maintenance-services of switching power supplies and peripherals. The company was founded on June 6, 1978 and is headquartered in Tokyo, Japan.