Nihon Knowledge Co Ltd (5252.T) provides software system verification services, system contract development, and business system packages primarily in Japan. The company operates through two main segments: the verification business, which offers quality planning, test analysis and design, test execution, software testing support, quality improvement consulting, test automation implementation consulting, software development process support, maintenance and operation support, and test automation support services; and the development business, which engages in customized contract development for packaged software from major vendors, as well as the development, sale, and maintenance of packaged software and security products including PowerSteel for the steel industry, PowerCubic for building materials and lumber wholesale, DEFESA Logger for operation log management, DEFESA REC recording solution, monoPack security product, and mono + WEB Separation web separation solution. Founded in 1985 and headquartered in Tokyo, the company targets industries such as steel wholesaling, processing, and building materials, serving clients through comprehensive ICT services focused on quality assurance and security. In October 2025, Nihon Knowledge completed the acquisition of Artex Co Ltd, enhancing its operational capabilities following an agreement signed in late September 2025.