| 1983 | Founded as a company independent of JGC Corporation. |
| 1983 | Concluded Reseller Agreement with IBM Japan Sales Co., Ltd. |
| 1984 | Concluded Exclusive Reseller Agreement in Japan of "PREMIS" and "CRESTA", project management systems, with K&HPS. |
| 1985 | Concluded Exclusive Reseller Agreement in Japan of "PICOM", a cost control system, with K&HPS. |
| 1985 | Concluded Reseller Agreement of "J-STAR" with Fuji Xerox Co., Ltd. |
| 1986 | Concluded Reseller Agreement of "PRIDE", development methodologies of M. Bryce & Associates (MBA). |
| 1992 | Established J-SYS Philippines, Inc. |
| 1992 | Concluded Reseller Agreement of "ORACLE" database with Oracle Corporation Japan. |
| 1993 | Concluded Reseller Agreement of "EDMICS" with Fuji Xerox Co., Ltd. |
| 1994 | Concluded Exclusive Reseller Agreement in Japan of "ERwin/ERX" with Logic Works,Inc. |
| 1994 | Concluded Reseller Agreement of "SAP R/3," with SAP Japan Co., Ltd. |
| 1995 | Concluded Reseller Agreement of "Metaphase" with SDRC. |
| 1997 |
Certified by the Ministry of International Trade and Industry as a system integrator (certification number: 08210051). |
| 1998 | Established Osaka Branch. |
| 1999 | Concluded Reseller Agreement with SAS Institute Japan Ltd. |
| 1999 | "PLANTIA," a facility maintenance management system, won a PM Award for Excellent Products (Efficiency Award) from the Japan Institute of Plant Maintenance. |
| 2000 | Concluded a system integration partnership Agreement of "AMMIC PB", an integrated production management system, with AMMIC Corporation. |
| 2000 | Established J-SYS Software Co., Ltd. |
| 2000 | Released J-Stage, integrated system of accounting, human resources management and administration for JGC, developed on Oracle EBS. |
| 2001 | Concluded Reseller Agreement of "ProActive" with Sumisho Computer Systems Corporation. |
| 2002 | Won Oracle Award "Showcase of the Year" in the BPR Division. |
| 2002 | Concluded Reseller Agreement of "SCAW" with NTT Data Systems Corporation. |
| 2004 | Certified ISO9001. |
| 2004 | Certified Privacy Mark. |
| 2005 | Concluded SI Partner Agreement of "Documentum" with EMC Corporation. |
| 2005 | Won Oracle Award "Oracle NeO of the Year" for "J-Stage". |
| 2005 | Concluded Mutual Reseller Agreement with Posdata Co., Ltd (South Korea). |
| 2005 | Concluded Apple Solution Experts Partnership Agreement with Apple Japan, Inc. |
| 2006 | Concluded Partnership with JFE Systems, Inc. |
| 2006 | Won Oracle Award "Oracle NeO of the Year" for "J-Stage". |
| 2007 | KOA System Design Co., Ltd. joined J-SYS group. |
| 2008 | Won Oracle Award "Accelerate Award". |
| 2008 | "PLANTIA",a facility maintenance management system, won a PM Award for Excellent Products (Efficiency Award) from the Japan institute of Plant Maintenance. |
| 2009 | Merged J-SYS Software Co., Ltd. |
| 2010 | Opened Kamakura Office. |