App QA on Real Devices
ACCEPTING ENGAGEMENTS
Our core service line: an AI runs your app on real iPhones and reports what it finds.
Independent Software Company — Fukuoka, Japan
An independent software companybuilding softwarethat lasts
RINSAI TECH is an independent software company in Fukuoka. We ship our own products — and bring the same care to client work: engineering, test automation, and AI systems built to hold up.
Scroll ↓33.5904° N · 130.4017° E — JST
01 — Services
What we build, and what we run
Real products, run in production — plus client work delivered to the same standard.
Our Own Apps
LIVE
Mobile apps we design, build, and operate ourselves.
Development & One-off Projects
OPEN FOR PROJECTS
One-off engagements, from sites and MVPs to AI integration and technical advisory.
Monthly Services
MONTHLY RETAINER
Ongoing care of your server and site, handled for a flat monthly fee.
02 — Company
Most software is replaced. Good software is kept.
i.
Cross-border by default
Based in Fukuoka, run by a Taiwanese founder — working natively across Japanese, Traditional Chinese, and English.
ii.
We run what we ship
Our own products live in production. Client work gets the same operational care — monitoring, testing, upkeep.
iii.
AI-native, human-signed
AI accelerates every step of our work; the engineer you talk to is the one who builds it, and stands behind every line that ships.
03 — Contact
Your idea —we'll build it properly
We reply within one business day — in Japanese, English, or Chinese.
Fukuoka, Japan — JST