SIG Group Co., Ltd. (4386.T) is a Japan-based information technology services provider primarily engaged in system integration, IT infrastructure solutions, and security services. The company offers planning, development, and maintenance of information systems, including control and monitoring systems for plants and embedded systems for manufacturing equipment serving public works, finance, and service industries; proposal and sales of various packaged software and hardware equipment; operation and maintenance of servers, network devices, databases, and backup systems; and security solutions encompassing products, vulnerability scanning, penetration testing, and design, construction, maintenance, and operation of security measures. Founded in 1991 and headquartered in Tokyo's Ichigaya Tokyu Building, SIG Group operates exclusively in Japan, targeting enterprise clients across multiple sectors with approximately 669 employees. In recent developments, the company changed its name from SIG Co., Ltd. to SIG Group Co., Ltd. in October 2021; agreed to acquire A Creation Co., Ltd. from Acro Holdings Co., Ltd. for ¥900 million in 2024; and completed management buyout transactions including the divestiture of Y.C.O. Co., Ltd. to Kenji Yoshimizu in March 2025, alongside earning certifications as a Create Strategic Partner from Hitachi Solutions Create, Inc. and an Excel Partner from Hitachi Solutions, Ltd. in May 2025.