CAC Corporation (CAC Co., Ltd.)

株式会社シーエーシー (CAC) is one of Japan's longest-established independent SIers, founded in 1966 as the industry's first independent specialist software company. It is now the core operating subsidiary of the Tokyo Stock Exchange Prime–listed holding company CAC Holdings, securities code 4725, and primarily provides system construction, system operations management, and HR/payroll BPO for clients in financial services, pharmaceuticals and life sciences, and manufacturing. For international students, it is a historically established but relatively low-profile, mid-sized SIer focused on deep, long-term engagement with user companies, rather than a large general-purpose SIer or foreign consulting firm.