
Fujitsu and The Japan Research Institute leverage generative AI to streamline customer system upgrade
Fujitsu Limited, The Japan Research Institute Limited
Kawasaki and Tokyo, Japan, January 23, 2025
Fujitsu Limited and The Japan Research Institute Limited (JRI) today announced the successful completion of phase one of a joint verification study related to a system upgrade project for Sumitomo Mitsui Banking Corporation (SMBC). The project utilizes generative AI to improve efficiency in addressing incompatibilities arising from the Red Hat Enterprise Linux (RHEL) version upgrade. The verification study, conducted from November 5, 2024, to January 15, achieved a 65% reduction in workload compared to conventional methods. Fujitsu and JRI began addressing the incompatibilities identified during the verification study on January 16, 2025.

Joint Verification Study Overview
Fujitsu and JRI aimed to achieve both improved productivity and stable operation through the application of generative AI, developed by Fujitsu, successfully extracting approximately 400 incompatibility issues. From there, the study identified incompatibilities affecting approximately 380 KLOC (1) of software applications written in the target programming languages C and Bash. Traditionally, extracting incompatibility information from release notes requires extensive manual review of voluminous documentation, a time-consuming and labor-intensive process.
In the execution phase implemented from January 16, 2025, Fujitsu and JRI are aiming toward further efficiencies by using generative AI to modify the source code of applications based on the incompatibilities identified.
In recent years, the increasing sophistication and complexity of systems in the financial industry have made upgrading core system infrastructure time-consuming and costly. In particular, identifying and addressing incompatibilities associated with version upgrades poses significant risks such as system downtime.
Future Plans
Fujitsu will leverage the technology and know-how gained from this project to continue contributing to the resolution of system development and maintenance challenges faced by clients across various industries, including financial institutions, through support for productivity improvement using generative AI.
JRI will leverage its expertise in large-scale financial systems to expand the results gained from this project to more systems within SMBC Group, contributing to achieving both further stable operation and improved productivity.
- [1]KLOC (thousands of lines of code) :
A traditional measure of how large a piece of software is.
About Fujitsu
Fujitsu’s purpose is to make the world more sustainable by building trust in society through innovation. As the digital transformation partner of choice for customers in over 100 countries, our 124,000 employees work to resolve some of the greatest challenges facing humanity. Our range of services and solutions draw on five key technologies: Computing, Networks, AI, Data & Security, and Converging Technologies, which we bring together to deliver sustainability transformation. Fujitsu Limited (TSE:6702) reported consolidated revenues of 3.7 trillion yen (US$26 billion) for the fiscal year ended March 31, 2024 and remains the top digital services company in Japan by market share. Find out more: www.fujitsu.com.
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Date: 23 January, 2025
City: Kawasaki and Tokyo, Japan
Company: Fujitsu Limited, The Japan Research Institute Limited