Tailored Solutions for Every Business.
Since 1996, SYSTEM I has looked beyond systems to focus on the heart of business. Combining finance-grade expertise with a client-first mindset, we drive IT evolution across industries. More than a vendor, we are your partner in co-creating the future through tailored, optimal solutions.
Flexibility
Customer-Centricity
Technical Expertise
Solutions
From strategy formulation to development and operations, we support business growth with optimal solutions tailored to each client’s stage.
High-Load
Tolerant
Infrastructure
Maintainable & Scalable
Development Foundations
Legacy System Modernization
& Modern Development
Operations, Maintenance
& Robust Security
Cloud Development
From cloud-native infrastructure construction to secure migration, data utilization, and security measures, we realize sustainable IT infrastructure.
AWS Development
AWS Development
Leveraging AWS, which boasts an overwhelming track record and reliability, we build resilient and efficient business foundations.
Our team includes many specialists with AWS certifications. Utilizing advanced design know-how, we realize a robust environment that securely protects our clients’ valuable data.
- Migrated an automaker’s core system to AWS, automating monitoring and maintenance operations.
Legacy Modernization
Security
Cost Reduction
IaC
CI/CD
Lambda
ECS
Terraform
Google Cloud Development
Google Cloud Development
We build foundations strong in the latest AI technology and data analysis, improving business prediction accuracy and decision-making speed.
When you want to launch a new service quickly, we support early business expansion using our cloud-native development capabilities as a weapon.
- Designed a data management platform (DMP) for a business company using BigQuery, from PoC to full construction.
Container Optimization
Technical Support
AI & Data Utilization
GKE
Kubernetes
BigQuery
Firebase
Microsoft Azure Development
Microsoft Azure Development
We maximize existing assets like Microsoft 365 to build highly compatible cloud environments.
Through smooth migration from core systems, we accelerate organization-wide DX without interrupting operations. We realize secure operation foundations required for large-scale organizations, including centralized ID management and advanced security controls.
- Built a high-volume distributed computing platform for a financial institution using Azure Batch and Python.
Cloud Security
Large-scale DX
Azure Batch
Azure SQL
Multi-Cloud Development
Multi-Cloud Development
Without being dependent on a specific vendor, we propose “optimal solutions” that maximize client benefits by combining different clouds. We establish sustainable business foundations that thoroughly address risk diversification (BCP measures) and can respond flexibly to future changes.
- Designed and built a serverless application site for a major infrastructure company using a combination of AWS and Azure.
Security
Avoid Vendor Lock-in
Disaster & Risk Mitigation
AWS
Azure
Google Cloud
Kubernetes
Application Development
We cover a wide range of services, from the construction, maintenance, and modernization of robust, large-scale core systems to modern app development.
IT Consulting
IT Consulting
We organize abstract “goals” and translate them into realistic and effective system configurations. Moving beyond strategy formulation, we define “highly feasible roadmaps” that anticipate development and operation, providing strong support for complex project management. Our technical consultants work closely with you from the deliberation stage to ensure business success.
- Supported internal R&D for Generative AI (Azure OpenAI) utilization, from use case deliberation to initial implementation.
Architecture Design
MVP Development
RFP Support
Project Planning Support
Large-scale PMO
Technical Support
Hands-on Support
Business Application Development
Business Application Development
We give shape to unique business flows and specialized onsite requirements that are difficult to address with existing software or SaaS. By carefully capturing business details and utilizing full-scratch development with optimal languages, we improve operational efficiency. We partner closely from the planning stage to propose solutions with speed and cost-effectiveness.
- Developed document management and workflows for financial institution loan approvals, including core system integration.
Existing System Integration
Dev Environment Optimization
Java
Spring Boot
C#
Go
Tablet Application Development
Tablet Application Development
We design specialized UI/UX that is easy to use at the front lines of business, such as store customer service or site inspections. We have a wealth of experience not only in new development but also in taking over and replacing projects from existing vendors. We solve specific challenges like offline support and external device integration with technology.
Vendor Takeover Support
Existing System Integration
Offline Support
UI/UX Design
Flutter
React
React Native
Next.js
Web Application Development
Web Application Development
From B2C services to B2B core systems, we meet diverse business needs. Using modern technologies like React and Go, we realize fast and robust foundations capable of withstanding simultaneous use by tens of thousands of users. With a pursuit of UI/UX and high implementation capabilities, we shape “high-quality web apps” that flexibly respond to future scalability and sudden load fluctuations.
- Implemented UI/UX improvements and functional additions for a real estate reservation and management web system.
- Built an information-sharing bulletin board for a business company using Python (Django) in a short period of approximately two months.
High Traffic Handling
DX Support
React
Go
TypeScript
Python
Django
Smartphone Application Development
Smartphone Application Development
Strengthening customer touchpoints by leveraging the features of iPhone and Android. In addition to Swift and Kotlin, we actively use advanced technologies like Flutter, proposing the most suitable method according to budget and deadline. We shape “intuitive and comfortable apps” that maximize device performance through UI/UX excellence and high implementation skills.
- Performed modifications for a digital security app used onsite in the energy industry.
- Developed a payment app for the manufacturing industry in Kotlin, integrating with peripheral devices such as automatic change dispensers.
Store Compliance
Multi-Platform
High Performance
Fast Turnaround
Swift
Kotlin
Flutter
Generative AI Solutions
Generative AI Solutions
From embedding AI into customer service to improving operational efficiency, we securely implement the latest technologies to maximize value. We provide one-stop support from use case deliberation to foundation construction. We have a wealth of experience in evolving existing services through optimal LLM selection, AI-based internal knowledge search (RAG/MCP), and voice/image analysis.
- Built AI functionality for a sales support system using Azure OpenAI and RAG technology.
- Built a high-precision data analysis platform resistant to noise using voice recognition AI (Whisper, etc.).
Use Case Deliberation Support
Operational Efficiency
AI Voice Analysis
Intelligent Automation
Multimodal AI
RAG
Azure OpenAI
AI OCR
Managed Services &
Maintenance
In addition to stable system operation, we provide continuous support for automation and efficiency through SRE and other methods.
24/365 Operations & Maintenance
24/365 Operations & Maintenance
Our dedicated team, aiming for 100% certification in ITIL and AWS, takes consistent responsibility from operation design to 24/7 monitoring and incident response. Using our insight as a development vendor, we provide high-quality operations with a deep understanding of everything from infrastructure to the application layer.
- Continued total operation and maintenance of applications and infrastructure for a major infrastructure company.
Multi-Cloud Support
ITIL Compliant
IT Support BPO
IT Support BPO
Leveraging our know-how and technical strength, we provide total support for IT operations, from help desks to asset management and complex administrative tasks. Through ITIL-compliant operation design, we achieve operational efficiency, process visualization, and stable quality, allowing clients to concentrate on core strategic tasks.
- Provided stable support for a corporate provider’s operations through a BPO structure, including incident response.
Infrastructure Ops Support
App Ops Support
Cutting-edge Tech Implementation
Process Visualization
Resource Optimization
Cost Optimization
SRE Support & RPA
SRE Support & RPA
We accelerate business speed through IaC technology that codifies infrastructure management and the construction of CI/CD environments. Moving beyond mere maintenance, we promote automation and optimization using RPA from an SRE perspective to increase system reliability. By eliminating human error and building a fast, robust structure, we contribute to business continuity and growth.
- Automated vulnerability response for thousands of financial servers using IaC, reducing man-hours by up to 95%.
Security Enhancement
Cost Reduction
CI/CD Environment Setup
IaC
Ansible
Track Record
Rapid Development of a Mobile App
for Over 20 Million Users
In a project with complex requirements for a major infrastructure company, we implemented full-cloud development using advanced technology. We achieved scalability capable of withstanding peak simultaneous access of thousands of requests per second and completed high-difficulty requirements in a short delivery period.
Continuous Support for Major Financial
Projects with a 30-50 Person Team
We built a maintenance and development team of 30 to 50 people for projects at major banks that support social infrastructure. As a partner entrusted with an annual budget of several hundred million yen, we continue to support multiple projects without any major issues.
Completion of Large-scale Projects
with Rapid 100+ Member Scaling
For projects totaling over 1,000 man-months, we built a structure of up to 110 members in a single month. We supported the client with reliable project management skills and completed large-scale projects through rapid resource input and flexible team restructuring.
Why Choose
SYSTEM I ?
Organizational Strength Built Over 30 Years.
End-to-End Execution from Upstream to Maintenance.
Since our founding in 1996, we have built a structure capable of handling all processes from consulting and development to operation and maintenance end-to-end. With the strong organizational power cultivated over our long history, we respond flexibly to large-scale and complex projects and take responsibility until completion.
Financial-Grade Quality × Cutting-Edge Tech.
Serving All Industries with “Hybrid Implementation Power.”
We combine the quality refined in financial system development, where high reliability is required, with the latest technology. With the flexibility unique to an independent firm and this “hybrid implementation power” as our weapon, we align closely with each client’s business. With a thoroughly customer-centric approach, we provide optimal solutions to solve challenges across diverse industries and accelerate business growth.
Ambition for Technology and Integrity.
Crafting “Tailor-Made Optimal Solutions” with Discernment.
As professionals, we place the highest importance on identifying the essence of our clients’ challenges. We carefully examine the best tools (technologies) from a vast range of options, including both established and emerging tech, with a view toward future potential and cost. We derive a “tailor-made optimal solution” carefully crafted with reliable discernment for the unique business challenges of every client.