Hitachi, Ltd. (Kabushiki-gaisha Hitachi Seisakusho?) 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.
Info gleaned from Wikipedia