No judgment by numbers.
Data is a letter from your body, not a report card. We start by finding what already works for you.
About the maker
The person building maru uses it every day.
Hi, I'm Yuji Kuwamizu, founder of Zanmaido K.K. maru is a product I shape daily, using my own glucose readings and my own meals.
The story
A life spent working with bodies.
Before maru, I spent years as a health coach and bodyworker, helping people settle their minds and bodies. If all those bodies taught me one thing, it is this: the right answer is different for every single person.
When I put a CGM sensor on my own arm and started logging every meal, something clicked β behind the numbers, I could see my own context. The same plate lands differently depending on sleep and time of day. It read like a letter, not a scorecard.
maru began with the wish to hand that feeling to more people.
Our promises
What maru stands for.
No chasing perfection.
Only what you can sustain, a little at a time. We believe 80% is plenty.
Your data belongs to you.
maru connects to the AI you already use precisely because your data is yours β portable, never locked in.
Company
- Company
- Zanmaido K.K.
- Founder & CEO
- Yuji Kuwamizu
- Location
- Kirishima, Kagoshima, Japan
- Business
- Development and operation of "maru β Glucose care companion"
- Contact
- support@nagaiki.ai
Invite-only, and improving every week.
maru is currently invite-only and available in Japanese. We won't claim something is finished when it isn't β instead, it gets a little better every week. An English release is on the way.
Get in touch