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AI-Native 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.

Start a project →See what we build
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01 — What we build

What we build

Real products, run in production — plus client work delivered to the same standard.

TabiDay

LIVE · APP STORE

AI travel planning — iOS

AI-powered travel itinerary planning. Tell it where you want to go — it plans the trip in your language, your style.

tabiday.com →Download on the App Store

Restaurant Websites

OPEN FOR PROJECTS

Multilingual sites for restaurants

Multilingual websites for restaurants welcoming guests from Korea, Taiwan and Hong Kong — supervised by a Taiwanese team.

AI Mobile Testing

ACCEPTING ENGAGEMENTS

AI-driven QA for mobile apps

AI-driven end-to-end testing for iOS and Android apps, proven on our own products. Now accepting engagements.

02 — Services

How we help

Fixed prices, no sales calls — from a company that ships its own products.

01

Test Automation

Flaky-suite rescue, mobile E2E with Appium, and CI pipelines that stay green — testing that earns trust back.

Flaky rescue · Appium · E2E

02

Web & App Builds

Landing pages, marketing sites, and app MVPs — designed, built, and shipped end to end in three languages.

Landing · Web app · MVP

03

Automation Scripts

Scraping, data pipelines, and reporting bots that quietly remove hours of manual work every week.

Scraping · Pipelines · Reporting

All services & pricing →

03 — 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; a human stands behind every line that ships.

04 — Contact

Let’s build itproperly.

[email protected] →
Fukuoka, Japan — JST