System Development Company
A Development Partner You Can Talk to Directly
Web development, app development, contract development, and website creation. From requirements gathering to maintenance, our developers handle everything end-to-end.
Go(od)Route
Plan a visiting order and estimated arrivals for multiple stops by car, on foot or by bicycle. Save routes, add visit notes and open your map app. Available on iOS, Android and Web, with 18 languages and 27 region settings.
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Go(od)Route guides
Find a guide for your next task
Prepare a delivery round
Plan delivery stops and review the route before starting navigation.
Read the guide →Add an address list
Paste an Excel address column, check matches, and understand CSV import.
Read the guide →Navigate with Google Maps
Review the stop order in Go(od)Route, then open a leg in your map app.
Read the guide →
FolderLane
Clear, familiar file management
Browse and organize files quickly with tabs, detailed lists, keyboard shortcuts, and direct renaming.
Mac App Store ↗ Explore FolderLane
CleanBomber
Place. Blast. Clean. Enjoy 150 physics puzzles.
MAHJONG & SHANGHAI
Angels Mahjong & Devils Shanghai
A mahjong story and a matching-tile puzzle.
Riichi mahjong and Shanghai tile puzzles in one app: twelve story chapters, 35 evolution matches, 140 Shanghai stages and twelve study puzzles.
One combined app for iOS and Android, currently in testing and preparing for general release.
Explore the appLineup
Angel & Devil Series
Available Fasting Island
Should you keep going, or break the fast? With angel and devil on your shoulders.
Available Sober Island
Two voices on your shoulders, one last drink.
Available Quit Smoking: Angel & Devil
Two voices on your shoulders, one last cigarette.
Available Angel's Drop
A vertical shooting game where you rescue fallen angels and devils with companions of light and dark.
Service
Services
Web Development
We handle everything from design to development and operation of web applications and web services.
Learn MoreApp Development
Planning, design, and development of iOS and Android apps. Cross-platform development available.
Learn MoreContract Development
Full-scratch system development tailored to your requirements. From requirements definition to maintenance.
Learn MoreWebsite Creation
From corporate site and landing page creation to operation and maintenance. Includes SEO optimization.
Learn MoreWhy Us
Why Choose Us
Direct Communication with Developers
Without going through a sales representative, the engineers who actually do the development directly listen to your needs and make proposals. This prevents miscommunication and achieves speedy and accurate development.
Agile and Flexible Response
Our agility is our strength, unlike large companies. We respond flexibly to "minor revisions" and "urgent requests." A dedicated contact person handles everything consistently, so you never need to re-explain the background.
Fair Pricing and Transparent Quotes
Because there are no subcontracting margins, we can propose fair prices. We provide detailed quotes with a breakdown of man-hours, making it easy to pass internal approval processes.
Security as Standard
NDA signing, OWASP-compliant development processes, and regular vulnerability assessments are included as standard. We also meet the security requirements of information systems departments.
About
About Us
Security-First
OWASP Top 10 compliant development processes, regular vulnerability assessments, and NDA signing as standard.
Direct Communication
Developers communicate directly with clients. No middleman margins, no miscommunication — speedy and accurate exchange of ideas.
Transparent Estimates
Detailed quotes with man-hour breakdowns. We consult in advance if additional costs arise, helping you manage your budget.
RT Information System
- Founded
- 2026
- Business
- System development, Web development, App development, Contract development, Website creation
- Location
- Chuo-ku, Kobe, Hyogo, Japan
Contact
Contact Us
Feel free to contact us for any inquiries about web development, app development, or system development. Consultations and estimates are free.