Including companies with more than one certified business site (as of March 31, 2021)
Mobility Sector
- Building Systems Business Unit, Hitachi, Ltd.
- Railway Systems Business Unit, Hitachi, Ltd.
- Hitachi Building Systems Co., Ltd.
Life Sector
- Healthcare Business Unit, Hitachi, Ltd.
- HITACHI GLOBAL LIFE SOLUTIONS, INC.
- Niigata Hitachi Co., Ltd.
- HITACHI APPLIANCES TECHNO SERVICE, LTD.
- Kantou Eco
- Hitachi Auto Parts & Service Co., Ltd.
- HITACHI Astemo HANSHIN, LTD.
- HITACHI Astemo, LTD.
- AKITA SHOWA INDUSTRY, LTD.
- HITACHI Astemo HIGH CAST, LTD.
- Hitachi Astemo Electric Motor Systems, Ltd.
- HITACHI HIGH-TECH CORPORATION
- Hitachi High-Tech Manufacturing & Service Corporation
- HITACHI HIGH-TECH SCIENCE CORPORATION
- HITACHI HIGH-TECH FINE SYSTEMS CORPORATION
- Hitachi High-Tech Fielding Corporation
- Hitachi High-Tech Support Corporation
- Hitachi High-tech Solutions Corporation
- HITACHI HIGH-TECHNOLOGIES KYUSHU
- HITACHI HIGH-TECH NEXUS CORPORATION
Industry Sector
- Industry & Distribution Business Unit, Hitachi, Ltd.
- Water & Enviroment Business Unit, Hitachi, Ltd.
- Industrial & Distribution Business Unit, Hitachi, Ltd.
- Hitachi Industry & Control Solutions, Ltd.
- HITACHI PLANT SERVICES CO., LTD.
- HITACHI INDUSTRIAL PRODUCTS, LTD.
- Hitachi Information & Energy Systems Co., Ltd.
- HITACHI PLANT MECHANICS CO., LTD.
- Hitachi Nico Transmission Co., Ltd.
- Hitachi Industrial Equipment Systems Co, Ltd.
- Hitachi Keiyo Engineering & Systems, Ltd.
- HITACHI INDUSTRIAL EQUIPMENT DRIVE & SOLUTIONS CO., LTD.
Energy Sector
- Energy Business Unit, Hitachi, Ltd.
- HITACHI PLANT CONSTRUCTION, LTD.
- HITACHI POWER SOLUTIONS CO., LTD.
- HITACHI POWER SEMICONDUCTOR DEVICE, LTD.
IT Sector
- System & Service Business Division, Hitachi, Ltd.
- Hitachi Channel Solutions, Corp.
- HITACHI SOCIAL INFORMATION SERVICES, LTD.
- Okinawa Hitachi Network Systems, Ltd.
- HITACHI INFORMATION & TELECOMMUNICATION ENGINEERING, LTD.
- HITACHI ICT BUSINESS SERVICES, LTD.
- HITACHI SYSTEMS, LTD.
- HOKKAIDO HITACHI SYSTEMS, LTD.
- HITACHI SYSTEMS ENGINEERING SERVICES, LTD.
- HITACHI SYSTEMS NETWORKS LTD.
- SHIKOKU HITACHI SYSTEMS, LTD.
- HITACHI SYSTEMS FIELD SERVICES, LTD.
- KYUSHU HITACHI SYSTEMS, LTD.
- HITACHI SYSTEMS POWER SERVICIES, LTD.
- HITACHI SOLUTIONS, LTD.
- HITACHI SOLUTIONS CREATE, LTD.
- HITACHI SOLUTIONS EAST JAPAN, LTD.
- HITACHI SOLUTIONS WEST JAPAN, LTD.
- HITACHI SOLUTIONS TECHNOLOGY, LTD.
- HITACHI VANTARA PTE LTD.(SINGAPORE)
- HITACHI VANTARA NEDERLAND B.V.
- HITACHI COMPUTER PRODUCTS (AMERICA),INC.
- Hitachi Financial Equipment System(Shen Zhen) Co.,Ltd. (China)
- HITACHI TERMINAL SOLUTIONS INDIA PRIVATE LIMITED
- HITACHI TERMINAL SOLUTIONS KOREA CO., LTD.
- HITACHI VANTARA MANUFACTURING CO., LTD.
Hitachi Metals Group
- Hitachi Metals, Ltd.
- NEOMAX ENGINEERING CO., LTD.
- Hitachi Ferrite Electronics, Ltd.
- Alcast Co,. Ltd.
- HITACHI METALS TRADING, LTD.
- HMY, Ltd.
- HITACHI METALS ADVANCED MACHINING, LTD.
- HMW, Ltd.
- Hitachi Metals Tool Steel, Ltd.
- Hitachi Metals Precision, Ltd.
- NEOMAX KINKI Co., Ltd.
- NEOMAX KYUSHUU Co., Ltd.
- HITACHI METALS NEOMATERIAL, LTD.
- SANTOKU CORPORATION
- Tohoku Rubber Co., Ltd.
Hitachi Construction Machinery Group
- Hitachi Construction Machinery Co., Ltd.
- Hitachi Construction Machinery Camino Co., Ltd.
- HITACHI CONSTRUCTION MACHINERY JAPAN CO., LTD.
- TADAKIKO CO., LTD.
- Hitachi Construction Machinery Tierra Co., Ltd.
Others
- Chugoku Area Operation, Hitachi, Ltd.
- Hitachi Real Estate Partners, Ltd.
- Mie Hitachi Co., Ltd.
- Shizuoka Hitachi Co., Ltd.
- HITACHI DOCUMENT SOLUTIONS CO., LTD.