Mutex
Tokyo, Japan · Artificial Intelligence, Health Care, Information Technology
Mutex is a software development company focused on AI-powered solutions for medical institutions. Its flagship product, Reze, is a SaaS platform designed to help medical institutions automate claim processing and improve operational management. By leveraging generative AI and machine learning, Reze simplifies administrative tasks and optimizes revenue for medical departments. Founded in 2022 and h
Key facts
- Headquarters
- Tokyo, Japan
- Employees
- 11
- Industries
- Artificial Intelligence, Health Care, Information Technology
- Status
- Private
- Website
- www.mutex-inc.dev
- Company page
Recent activity at Mutex
- : Mutex raises ¥281.6M in Series A funding to expand its AI-powered medical billing SaaS, Reze, with participation from MTI Co., Ltd., MEDIPAL Innovation Investment Limited Partnership, and Nippon Management Co., Ltd.
- : Mutex Raises ¥60 Million in Seed Funding led by MTI Co., Ltd. to enhance product development for its AI-powered medical claims platform.
Mutex funding history
| Date | Round | Amount |
|---|---|---|
| Oct 2026 | Series A | $281.6M |
| Dec 2025 | Seed | $60.0M |
Leadership
- Ryotaro Hayashi, Engineer
- Yuto Yoshihara, Chief Technology Officer
Verified email and direct lines for Mutex’s decision-makers are on Fundz. See plans — or book a 15-minute walkthrough.
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About Mutex: questions and answers
What does Mutex do?
Mutex is a software development company focused on AI-powered solutions for medical institutions. Its flagship product, Reze, is a SaaS platform designed to help medical institutions automate claim processing and improve operational management. By leveraging generative AI and machine learning, Reze simplifies administrative tasks and optimizes revenue for medical departments. Founded in 2022 and h
Where is Mutex headquartered?
Mutex is headquartered in Tokyo, Japan.
How many employees does Mutex have?
Mutex has about 11 employees.
Has Mutex raised funding?
Yes. Fundz has recorded 2 funding events for Mutex. The most recent, Series A of $281.6M, was in Oct 2026.
What is the latest news on Mutex?
On Oct 05, 2026, Mutex raises ¥281.6M in Series A funding to expand its AI-powered medical billing SaaS, Reze, with participation from MTI Co., Ltd., MEDIPAL Innovation Investment Limited Partnership, and Nippon Management Co., Ltd.
Source: Fundz records from SEC filings, press releases and company announcements. How Fundz measures data accuracy