Hitachi, Ltd. (株式会社日立製作所, Kabushiki-gaisha Hitachi Seisakusho?) (Japanese pronunciation: [çitatɕi]) is a Japanese multinational conglomerate headquartered in Marunouchi 1-chome, Chiyoda, Tokyo, Japan. The company is the parent of the Hitachi Group (Hitachi Gurūpu) as part of the larger DKB Group companies. Hitachi has been a diversified company that has 11 business segments: Information and Telecommunication Systems, Electrical Systems, Social and Industrial Systems, Automotive Systems, Electronic Component Devices, Construction, and Financial services.
On the 2011 Forbes Global 2000 list, Hitachi was ranked number 473.
Hitachi Works is the oldest member of the Hitachi Group and consists of three factories: Kaigan, Hitachi-LG Yamate, and Rinkai Works. Yamate Works, the oldest of the three factories, was founded in 1910 by Namihei Odaira as an electrical equipment repair and manufacturing facility. This facility was named Hitachi, after the Hitachi Mine near Hitachi, Ibaraki, and is regarded as the ancestral home of Hitachi, Ltd.