Why Legacy Modernization Fails — And How to Get It Right
Japan's corporate landscape is home to some of the most complex legacy systems on the planet. Decades of custom-built COBOL, proprietary hardware, and deeply embedded business logic have made digital transformation not just a technical challenge, but an organizational one.
In this ICTI Xperts session, our expert shares hard-won lessons on legacy modernization and digital transformation. Drawing on years of real-world delivery across Japanese enterprises, the talk moves beyond theory into the practical decisions that actually move the needle.
The Three Root Causes of DX Failure
- Underestimating data migration complexity — most teams plan for schema migration but forget business rule migration
- Big-bang thinking — replacing everything at once almost always fails; strangler-fig patterns work far better
- Ignoring the human side — the engineers know the system, but they're rarely consulted in the transformation plan
We explore the common pitfalls teams hit, the mindset shifts required, and the delivery patterns that consistently deliver value — even in organizations where the culture still resists change. The session covers real migration projects, including a retail chain modernization that reduced processing time by 70% while keeping zero downtime.
Key Takeaways
Whether you're a CTO planning a multi-year migration or a delivery manager trying to ship incrementally, this session gives you a repeatable framework: assess, isolate, migrate in slices, and measure continuously. The goal is not a perfect new system — it's a system that keeps getting better without stopping the business.