Fujitsu Limited and IBM Japan, Ltd. today announced that they will accelerate their collaboration in the field of business system modernization in order to advance enterprise digital transformation and address challenges associated with legacy systems. This comes as part of the collaboration between the two companies announced in September 2025.
Modernization is an essential initiative for driving digital transformation. Achieving successful modernization requires careful consideration of business characteristics, system requirements, and architectural attributes, along with selecting optimal technologies and programming languages. Among the effective approaches are rewriting, which converts existing program languages into those suited for modern environments, and refactoring, which enhances maintainability and scalability through improvements to application structure.
In this collaboration, the companies will expand modernization initiatives centered on rewriting and refactoring. This will be achieved by leveraging Fujitsu’s modernization solution “Fujitsu PROGRESSION”, which automatically converts source code, together with IBM’s AI-powered development partner “IBM Bob.”
The scope includes rewriting COBOL programs running on Fujitsu mainframes and UNIX servers into Java, as well as refactoring after conversion. With Fujitsu providing technical support, IBM Japan will serve as the primary provider of the solution. This collaboration will go beyond simple migration of customer assets to jointly promote modernization that supports digital transformation over the medium to long term.