Quest, founded in 1965, provides system development and maintenance, infrastructure services and business process outsourcing. Its main customer fields include semiconductors, manufacturing, finance, information and communications, entertainment, the public sector, mobility and logistics, and healthcare. It had 1,132 employees as of 1 April 2026 and is headquartered in Shibaura, Minato, Tokyo.
Its solutions include Dynamics 365 and Microsoft 365 implementation, product lifecycle management, AWS and Azure construction and operation, and cloud-based remote monitoring. Security offerings include the Q-SOC security operation center, attack surface management reporting and endpoint security, while automation and data work covers chatbots, RPA and AWS Redshift.
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