Hitachi may refer to:

• Hitachi, Ltd., a group of companies, manufacturer of electric and electronic products;
• Hitachi Maxell Ltd., commonly known as Maxell, a separate Japanese electronics company;
• Hitachi Works, the oldest member of the Hitachi group and ancestral home of Hitachi, Ltd.;
• Hitachi Global Storage Technologies, independent disk drive manufacturer, wholly owned subsidiary of Hitachi, Ltd.;
• Hitachi Cable, independent spin-off of Hitachi Works;
• Hitachi Data Systems Corporation (HDS), a subsidiary of Hitachi, with enterprise storage systems group based both in Japan and in Santa Clara, California, US;
• Hitachi Canadian Industries Ltd. (HCI), an independent subsidiary of Hitachi, Ltd. located in Saskatoon, Canada;
• Hitachi Hatsukaze, aircraft engines built in Japan;

• Hitachi, in Ibaraki province, Japan;
• Hitachi province, former province of Japan;

• Prince Hitachi and Princess Hitachi, members of the Japanese imperial family;

• Hitachi trains in Melbourne, Australia;

Hitachi | 日立 | Hitachi