TISI Inc. provides information technology (IT) services in Japan and internationally. It operates through Offering Service Business, Business Process Management, Financial IT Business, Industrial IT Business, and Wide-area IT Solutions segments. The company provides knowledge-intensive IT services; outsourcing of IT technology, business know-how, and human resources solutions; promotes business and IT strategies together and support business promotion; considers and promotes initiatives and supports the promotion of business; professional IT services, including regional and client sites, and accumulate and develop solutions to support problem-solving and business promotion. It serves public sector, manufacturing, distribution, communications, food, healthcare, energy, leasing, life and non-life insurance, banking, and credit card and consumer finance industries. The company was formerly known as TIS Inc. and changed its name to TISI Inc. in July 2026. TISI Inc. was founded in 1971 and is headquartered in Shinjuku, Japan.