How much does legacy app modernization cost in Tokyo?

Project costs vary based on scope and complexity. Typical legacy app modernization projects range from $15,000 for MVPs to $250,000+ for enterprise platforms. Tokyo's business environment offers cost advantages compared to coastal tech hubs. We provide a free consultation with a detailed quote.

What is your legacy app modernization process?

Our proven process includes: Legacy System Audit → Modernization Strategy → First Module Rebuild → Progressive Migration. Each phase has clear deliverables and stakeholder reviews, so Tokyo businesses stay in control throughout the project.

What technologies do you use for legacy app modernization?

Our legacy app modernization stack includes Next.js, React, Node.js, TypeScript, Python, PostgreSQL. We choose technologies based on your project requirements, team capabilities, and long-term maintainability — not trends.

Do you work with startups in Tokyo?

Yes. We work with businesses of all sizes in Tokyo — from pre-seed startups building MVPs to enterprises modernizing legacy systems. Our flexible engagement models scale to match your budget and timeline.

How long does legacy app modernization take?

The first module is typically rebuilt and deployed in 6–10 weeks. Full modernization of a medium-complexity application takes 4–8 months. Large enterprise systems with dozens of modules can take 12–18 months. The incremental approach means you get value early and can adjust scope as you go.

How much does legacy app modernization cost?

First module rebuild: $25,000–$50,000. Full modernization of a medium application: $80,000–$200,000. Enterprise-scale modernization: $200,000–$500,000+. We scope based on the legacy audit and prioritize modules by business impact to maximize early ROI.

Legacy App Modernization Company in Tokyo, JP

Legacy App Modernization in Tokyo, JP

ZTABS delivers professional legacy app modernization for Tokyo businesses — including incremental modernization, business logic preservation, data migration. Serving Gaming, Robotics, FinTech companies in Tokyo, JP.

Start Your Project View Our Work

ZTABS provides legacy app modernization services in Tokyo, JP — including incremental modernization, business logic preservation, data migration, and more. We work with Tokyo businesses across Gaming, Robotics, FinTech using technologies like Next.js, React, Node.js.Get a free consultation →

Legacy App Modernization Capabilities for Tokyo

Our legacy app modernization team delivers a full range of capabilities tailored to Tokyo's Gaming and Robotics sectors:

✓
Incremental Modernization
Modernize one module at a time — reducing risk, delivering value early, and keeping the business running throughout.
✓
Business Logic Preservation
We extract and document the business rules embedded in legacy code so nothing gets lost in the new system.
✓
Data Migration
Migrate from legacy databases (Access, FoxPro, SQL Server) to modern PostgreSQL or cloud-managed databases.
✓
API Layer Design
Build modern REST or GraphQL APIs that let the new system talk to legacy components during the transition period.
✓
Automated Testing
Create comprehensive test suites that verify the new system behaves identically to the old one for every critical workflow.
✓
Cloud Deployment
Deploy the modernized application on AWS, Azure, or Vercel with CI/CD pipelines, monitoring, and auto-scaling.

View all legacy app modernization capabilities →

Our Legacy App Modernization Process

1Legacy System Audit→2Modernization Strategy→3First Module Rebuild→4Progressive Migration→5Data Migration→6Decommission Legacy

Each phase includes clear deliverables and Tokyo stakeholder reviews. See our full process →

Tech Stack for Tokyo Legacy App Modernization Projects

Next.js React Node.js TypeScript Python PostgreSQL

See full technology details →

Why Tokyo Businesses Choose ZTABS for Legacy App Modernization

Tokyo (Asia's largest tech and gaming hub, population 14 million) is home to thriving Gaming, Robotics, FinTech sectors — each with distinctlegacy app modernization needs. Gaming companies need game engines, live service platforms, and mobile game infrastructure. Robotics firms require control systems, computer vision, and IoT integration. Banks need core banking modernization and digital transformation. Enterprises need ERP, workflow, and automation software for Japan's unique business processes.

Tokyo is Asia's largest metropolis and a major tech hub in gaming, robotics, fintech, and enterprise software. The city hosts global gaming companies, industrial robotics leaders, and major financial institutions. Japan's corporate digital transformation drive and aging society create opportunities in automation, healthtech, and enterprise software.

World's largest metropolitan economy. Government pushing digital transformation (Digital Agency). Strong engineering talent and manufacturing excellence. Access to Japanese enterprises undergoing digitalization. Quality standards and reliability expectations drive high software quality requirements.

Legacy App Modernization for Tokyo's Key Industries

Each of Tokyo's core sectors has specific legacy app modernization requirements. We build solutions tailored to these industry needs:

Gaming

Tokyo's gaming companies need specialized legacy app modernization that addresses sector-specific compliance, integrations, and workflow requirements.

Robotics

Tokyo's robotics companies need specialized legacy app modernization that addresses sector-specific compliance, integrations, and workflow requirements.

FinTech

Tokyo's fintech companies need specialized legacy app modernization that addresses sector-specific compliance, integrations, and workflow requirements.

Legacy App Modernization for FinTech →

Enterprise Software

Tokyo's enterprise software companies need specialized legacy app modernization that addresses sector-specific compliance, integrations, and workflow requirements.

How We Work With Tokyo Businesses

Our distributed engineering team delivers the same quality and responsiveness as a local partner. World's largest metropolitan economy. Government pushing digital transformation (Digital Agency). Strong engineering talent and manufacturing excellence. Access to Japanese enterprises undergoing digitalization. Quality standards and reliability expectations drive high software quality requirements.

Timezone-Aligned Availability

Our team schedules overlap with Tokyo's your local time business hours for real-time standups, reviews, and demos.

Dedicated Project Manager

A single point of contact who understands your business context and Tokyo's market.

Transparent Communication

Daily async updates, weekly video calls, and shared project boards keep you informed at every stage.

Built for Tokyo's Industries

We understand Tokyo's key sectors — Gaming, Robotics, FinTech — and build solutions tailored to their requirements.

Frequently Asked Questions

Common questions about legacy app modernization in Tokyo

We offer end-to-end legacy app modernization for Tokyo businesses: incremental modernization, business logic preservation, data migration, api layer design. We use technologies like Next.js, React, Node.js to build solutions tailored to Tokyo's key industries — Gaming, Robotics, FinTech.

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Legacy App Modernization

Learn more about our legacy app modernization services nationwide.

Next.js

Next.js transforms web applications into high-performance, SEO-friendly platforms that drive user engagement and boost conversion rates. Leverage its capabilities to streamline your development process and accelerate time-to-market, ensuring your business stays ahead of the competition.

React

Harness the power of React to accelerate your development process, enhance user experiences, and drive ROI. With its component-based architecture, React allows businesses to build dynamic applications that are both scalable and maintainable, ensuring long-term success in a competitive landscape.

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Legacy App Modernization Project?

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