| 1978 | Established as Hitachi Computer, Consultant Ltd., Shinagawa | 
|---|---|
| 1986 | Corporate Headquarters moved to Ota-ku | 
| 1986 | Established Computer Technologies, Ltd., Shinagawa | 
| 1989 | Renamed as Hitachi Systems Engineering, Inc. | 
| 1989 | Registered with the Ministry of International Trade and Industry as a "systems service enterprise" | 
| 1991 | Registered with the Ministry of International Trade and Industry as a "systems auditing enterprise" | 
| 1995 | Achieved ISO9001 | 
| 1998 | Computer Technologies, Ltd. renamed Hitachi Systems Assist, Ltd. | 
| 2000 | Hitachi Seibu Software, Ltd., and Hitachi Chubu Software, Ltd., merged and renamed Hitachi Systems & Services, Ltd. | 
| 2001 | Chubu Area Operations acquired ISO14001 | 
| 2002 | Corporate Headquaters and Kansai Area Operations achieved ISO14001 | 
| 2002 | Achieved Japan Information Processing Development Corporation "Privacy Mark" | 
| 2004 | Corporate Headquarters moved to Minato-ku | 
| 2004 | Listed on 2nd Section of Tokyo Stock Exchange | 
| 2004 | Transition to Company with Committees effected | 
| 2005 | Hitachi Systems Assist, Ltd., and Net Services Inc., merged and  | 
| 2010 | Hitachi Systems became a wholly owned subsidiary of Hitachi Ltd. |