Web App Development - Legacy System Renovation & Replacement

We renovate outdated systems and replace them with modern technologies.

Modernize Your Legacy Systems

We replace outdated systems with modern technologies to improve maintainability and scalability.

We handle everything from incremental renovations to full replacements.

Challenges We Solve

  • System is old and slow.

    We rebuild with modern technologies to improve performance.

  • Original developer is gone.

    We analyze the code and establish a handover and maintenance structure.

  • Adding features is difficult.

    We redesign with an architecture that is easy to extend.

  • Security concerns.

    We modernize the system with the latest security measures.

Service Details

  • Current System Assessment.

    We investigate the existing system's code, configuration, and issues.

  • Renovation Proposal.

    We propose the best approach, whether incremental renovation or a full replacement.

  • Replacement Development.

    We rebuild the system with a new technology stack.

  • Data Migration.

    We migrate existing data to the new system.

  • Parallel Operation.

    We support parallel operation of the old and new systems.

  • Handover & Documentation.

    We document the system configuration and operational procedures.

Development Flow

Development Process

1

Current System Assessment

We investigate the existing system and identify issues.

2

Renovation Plan

We define the scope, approach, and schedule.

3

Design

We design the new system.

4

Development

We develop the new system.

5

Data Migration & Testing

We migrate data and verify functionality.

6

Switchover

We switch to the new system.

Pricing

ServicePrice (excl. tax)
Current System Assessment
Code analysis and issue report
From ¥200,000~
Partial Renovation
Renovation or addition of specific features
From ¥500,000~
Full Replacement
Complete system rebuild
From ¥2,000,000~

* Prices vary depending on system scale and complexity.

FAQ

We can handle major languages such as PHP, Java, Ruby, and Python. Please let us start with a current system assessment.

Yes, we can analyze from the source code. However, the investigation may take additional time.

Yes, we support data migration from the existing database to the new system.

Related Services

Web App Development

We develop web applications that streamline your business, including business support systems, admin dashboards, and API integrations.

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API & External Service Integration

We develop API integrations and data connections with external services, automating data exchange between systems.

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Get in Touch

Tell us about your business challenges in web marketing, web design, or system development.

Office

  • Tokyo Office
    Shinjuku City Gen Building
    7-17-14 Nishi-Shinjuku, Shinjuku-ku
    Tokyo 160-0023, Japan