| 1974-01 |
Established Victor Computer Kyushu Sales Co., Ltd. in Kagoshima City with capital of 1.2 million yen. |
| 1976-08 |
Renamed to Victor Terminal Systems Co., Ltd. |
| 1978-06 |
Renamed to Kagoshima Business Computer Co., Ltd. |
| 1978-08 |
Released medical accounting system 'V1'. |
| 1979-05 |
Made Miyazaki Business Computer Co., Ltd. (Miyazaki City) a subsidiary (now our Miyazaki office). |
| 1985-06 |
Established Spec Co., Ltd. (Kagoshima City) (now our System Development Department I). |
| 1985-09 |
Established Japan Medical System Co., Ltd. (Fukuoka City) (now our Fukuoka branch). |
| 1986-04 |
Made West Japan Business Computer Co., Ltd. (Kurume City) a subsidiary (now our Kurume branch). |
| 1998-06 |
Established Cyberway Co., Ltd. |
| 1998-06 |
Released medical accounting system 'HONEST V7'. |
| 2001-01 |
Kagoshima Business Computer Co., Ltd. absorbed and merged with four group companies—Miyazaki Business Computer Co., Ltd., West Japan Business Computer Co., Ltd., Japan Medical System Co., Ltd., and Spec Co., Ltd.—and renamed to Softmax Inc. |
| 2002-04 |
Opened a Tokyo branch in Taito-ku, Tokyo. |
| 2002-06 |
Released medical accounting system 'HONEST Medical V8'. |
| 2002-10 |
Released ordering system 'HONEST Order V1'. |
| 2004-01 |
Released ordering system 'HONEST Order V2'. |
| 2004-02 |
Started selling electronic medical record system 'Electronic Medical Record V1'. |
| 2004-04 |
Established headquarters in Chuo-ku, Tokyo and simultaneously relocated the Tokyo branch. |
| 2005-03 |
Started selling electronic medical record system 'Electronic Medical Record V2'. |
| 2006-04 |
Softmax Inc. absorbs Cyberway Inc. |
| 2009-01 |
Released the medical accounting system 'HONEST Medical V9'. |
| 2009-02 |
Established Human Medic Co., Ltd. (Akita City) to promote our products in the Tohoku region, provide implementation guidance and support (currently our Akita office). |
| 2011-04 |
Released the web-based electronic medical record system 'HONEST Karter V3'. |
| 2011-05 |
Moved headquarters to Kajiya Town, Kagoshima City. |
| 2013-03 |
Listed on the Tokyo Stock Exchange Mothers (ticker: 3671). |
| 2013-07 |
Changed product brand name from HONEST to PlusUs. |
| 2013-11 |
Opened a Sendai office in Aoba-ku, Sendai City, Miyagi Prefecture (moved to Sendai branch in August 2023). |
| 2013-12 |
Opened an Akita office in Akita City, Akita Prefecture. |
| 2016-02 |
Moved headquarters and Tokyo branch to Shinagawa-ku, Tokyo. |
| 2017-08 |
Released the medical accounting system 'PlusUs Medical V10'. |
| 2020-11 |
Opened a Sapporo office in Chuo-ku, Sapporo City, Hokkaido. |
| 2022-04 |
Transitioned to the Growth Market due to the Tokyo Stock Exchange market reorganization. |
| 2023-08 |
Opened a Sendai branch in Aoba-ku, Sendai City, Miyagi Prefecture. |
| 2023-11 |
Released the medical accounting system 'PlusUs Medical V11'. |
| 2024-01 |
Released the web-based electronic medical record system 'PlusUs Karter V5'. |
| 2025-12 |
Changed market classification to the Tokyo Stock Exchange Standard Market. |
