| 1969-04 |
Established as Japan System Development Co., Ltd. in Higashi-ku, Osaka City (now Chuo-ku) |
| 1969-04-08 |
Established: April 8, 1969 (Showa 44) |
| 1970-04 |
Established a sales office in Tokyo |
| 1977-08 |
Established a sales office in Nagoya |
| 1984-02 |
Established a sales office in Fukuoka |
| 1988-11 |
Listed on the Osaka Securities Exchange Second Section |
| 1998-09 |
Designated as a stock on the Osaka Securities Exchange First Section |
| 1999-11 |
Listed on the Tokyo Stock Exchange First Section |
| 2001-05 |
Made FSK Co., Ltd. a subsidiary (system integration and outsourcing) |
| 2002-10 |
Acquired Privacy Mark from Japan Information Processing Development Association (now Japan Information Economy and Society Promotion Organization) |
| 2007-08 |
Started shareholder relations services (shareholder benefits, etc.) at Shareholders Relations Service Co., Ltd. |
| 2010-10 |
Changed trade name to NSD Co., Ltd. |
| 2012-05 |
NSD International, Inc. was established in New York State, USA (Services for Japanese companies) |
| 2014-02 |
Chengdu Renben New Dynamic Technology Co., Ltd. was established in Chengdu, China (Offshore development) |
| 2015-03 |
(株)NM Systems was made a subsidiary (HR and logistics solutions) |
| 2017-12 |
(株)Japan Job Posting Service was made a subsidiary (HR solutions) |
| 2018-10 |
(株)NM Systems and (株)Japan Job Posting Service merged, and the company name was changed to (株)Stellas |
| 2018-10 |
(株)NM Systems and (株)Japan Job Posting Service merged, and the company name was changed to (株)Stellas (to improve management efficiency and strengthen response to diversified customer needs) |
| 2019-04 |
(株)NSD Advanced Technology Laboratory was established (AI technology applied research) |
| 2022-04 |
Moved to the Tokyo Stock Exchange Prime Market |
| 2022-08 |
Opened a business office in Sendai |
| 2022-10 |
Trigger Inc. was made a subsidiary (IT consulting) |
| 2023-01 |
Opened a business office in Hiroshima |
| 2023-04 |
(株)Art Holdings was made a subsidiary (Software development and solution services) |
| 2023-05 |
(株)Noza was made a subsidiary (Medical and dental solutions) |
| 2024-07 |
Trigger Inc. was absorbed and merged, and the Consulting Business Division was established. The company name of (株)NSD Advanced Technology Laboratory was changed to NSD-DX Technology Inc. |
| 2024-07 |
Merged with Trigger Inc. and established the Consulting Business Division: Changed the company name of (株)NSD Advanced Technology Laboratory to NSD-DX Technology Inc. |
| 2026-04 |
The company name of NSD-DX Technology Inc. was changed to NSD AI Technology Inc. The company name of (株)Stellas was changed to (株)NSD Digital Solutions. (株)Art Technology merged with (株)Art Holdings. |
| 2026-04 |
Changed the company name of NSD-DX Technology Inc. to NSD AI Technology Inc.; Changed the company name of (株)Stellas to (株)NSD Digital Solutions; Art Technology merged with Art Holdings Inc. |
| 2026-05 |
Opened a business office in Sapporo |
