As the end of support for Fujitsu UNIX approaches, momentum for migration is building in Japan. As of 2026, approximately 540 companies and 4,600 systems are believed to be affected, and examples have been presented in which incompatibility and performance were cited as factors hindering migration.
Support for Fujitsu UNIX servers is scheduled to end at the end of November 2034, increasing pressure to migrate. Nikkei xTECH reported that, as of 2026, approximately 540 companies and 4,600 systems in Japan were affected, with around 160 companies, mainly manufacturers, yet to decide on a migration policy.
UNIX systems have been replaced with x86 servers running Linux or Windows, but issues described as the negative legacy of open systems have been identified as barriers to migration.