Quest Co., Ltd. engages in the provision of information services which include consulting services, system development and maintenance and, infrastructure services. It operates through the following segments: System Development, Infrastructure Services, and Others. The System Development segment provides various operation system consulting services and also handles system design, development, and maintenance. The Infrastructure Services segment offers various systems for client's companies such as infrastructure and system operations, monitoring business, helpdesk, and technical support services. The Others segment includes consignment calculation and purchase product sales business. The company was founded by Hiroshi Uchida on May 14, 1965 and is headquartered in Tokyo, Japan.