History
| Apr, 1969 | NSD established as Nippon System Development Co., Ltd. (Original company name) in Osaka-city. |
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| Apr, 1970 | Opened office in Tokyo. |
| Aug, 1977 | Opened office in Nagoya-city. |
| Feb, 1984 | Opened office in Fukuoka-city. |
| Nov, 1988 | Listed on the 2nd Section of the Osaka Securities Exchange. |
| Sep, 1998 | Listed on the 1st Section of the Osaka Securities Exchange. |
| Nov, 1999 | Listed on the 1st Section of the Tokyo Stock Exchange. |
| May, 2001 | Acquired FSK Co., Ltd. as a subsidiary. (system integration/outsourcing) |
| Apr, 2002 | Received certification that our personal information protection system complies with the standards of JIPDEC*.
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| Aug, 2007 | Shareholders Relation Service, Inc. launched operations. (shareholder benefit services) |
| Oct, 2010 | Changed name to NSD Co., Ltd. |
| May, 2012 | Established NSD International, Inc. in New York, U.S. (services for Japanese companies in the U.S.) |
| Feb, 2014 | Established Chengdu Renbenxindong Technology Ltd. in Chengdu, China. (offshore development and services) |
| Mar, 2015 | Acquired NMSystems Co., Ltd. as a subsidiary. (human resources and logistics solutions) |
| Dec, 2017 | Acquired Japan Job Posting Service, Inc. as a subsidiary. (human resources solutions) |
| Oct, 2018 | NMSystems Co., Ltd. and Japan Job Posting Service, Inc. merged under the name StellaS Co., Ltd. |
| Apr, 2019 | Established NSD Advanced Technology Research Institute Co., Ltd. |
| Apr, 2022 | Moved to the Prime Market of the Tokyo Stock Exchange. |
| Aug, 2022 | Opened office in Sendai-city. |
| Oct, 2022 | Acquired Trigger Inc. as a subsidiary. (IT consulting) |
| Jan, 2023 | Opened office in Hiroshima-city. |
| Apr, 2023 | Acquired ART Holdings Co., Ltd. as a subsidiary. (software development and solution services) |
| May, 2023 | Acquired NHOSA Corporation as a subsidiary. (dental and medical solutions) |