Japan, Sept. 14 -- Sony Bank, Inc. (Sony Bank) and Fujitsu Limited (Fujitsu) announced the full-scale application of generative AI in the development of Sony Bank's core banking system, starting in September 2025. By establishing a mechanism for AI to utilize development assets such as design documents, source code, and test assets, and gradually expanding its application to key processes from design to manufacturing and testing through actual development, the companies have confirmed a 30% reduction in the development period from basic design to integration testing as of July 2026, compared to conventional methods.The system adopts Fujitsu's core banking solution, "Fujitsu Core Banking xBank" ("Core Banking xBank"). "Core Banking xBank" fe...