A Shopify app reviewed, published, and running (UreyukiBox)
About
About
Mumu Labo is a founder-led sole proprietorship for website design, business systems, and original software products.
I plan, build, run, and sell my own products end to end. The focus is the Japanese business practices, regulations, and language that overseas apps tend to overlook, and the goal is tools that take the busywork out of everyday work and stay useful for years. I also take on custom development — apps, internal tools, and workflow automation.
The name “Mumu” comes from elephants passing a heart — the value — trunk to trunk, from parent to child to grandchild. Look closely at the logo and you will see it spelled out: the parent’s legs are the “M”, its trunk the “u”, the calf’s legs the “m”, and its tail the final “u”. Each time the value is handed on, it grows a little larger. That is what I want these tools to do: take something good that has been built up, grow it, and pass it to the next generation. Value, paid forward.
What I care about
01
Receive up close
Like elephants greeting trunk to trunk, I get close first. I start by taking in the real problem behind the request — and the value you have already built up.
02
Grow the value
I don’t hand things back unchanged. I grow them into tools, researched against Japanese business practices, regulations, and language, and built to stay useful for years.
03
Pass it forward
The grown value goes to a user, and spreads from there to others. Feedback from the people using it feeds the next round of development and reaches new users again — value that grows as it is paid forward.
MAKER & PROOF
My own products are the proof that I can build
Electrical design (nuclear plant equipment) → software. More than five of those in software development
Delivery time cut on a trust bank platform (previous role)
Page-transition performance improvement (previous role)
The delivery and performance figures come from individual projects handled in a previous role and do not guarantee the same outcome for every project.
High-payout affiliate partners wanted
Propose a product that would be easy to recommend in your niche — if it looks promising, I build it. Commission accrues for as long as each referred user stays on a paid plan. The partnership is direct, with no intermediary network taking a cut.
Standard 20%Pre-launch via your referral link 30%You refer your proposed product 40%
About the maker
From electrical design to software development, Mai works across front end, back end, and infrastructure. She now plans, builds, launches, and operates her own Shopify apps. Her background in translation also helps her uncover and structure the real problem behind each request.
Main stack: Ruby on Rails / React / Next.js / TypeScript / JavaScript / Python (Flask, FastAPI, Sinatra) / Java / PHP (Symfony) / HTML, CSS / MySQL / PostgreSQL / SQL / AWS (EC2, S3) / Docker / Nginx / Cisco fundamentals / Git / GitHub Actions (CI/CD) / Shell / VS Code
| Trade name | Mumu Labo |
|---|---|
| Representative | Mai Sato |
| Address | MIEUX Shibuya Bldg. 8F, 5-3 Maruyamacho, Shibuya-ku, Tokyo 150-0044, Japan |
| Phone | 050-6864-5901 |
| Business | Planning, development, operation, and sale of my own software; custom software development; and the operation of a partner program |
| Contact | [email protected] |
| Website | mumulabo.com |
Full business details are published in the Commercial transactions notice.