Mutex, a Tokyo, Japan-based provider of AI-powered medical insurance claim support SaaS for medical institutions, has raised ¥60 million in Seed funding.
Investors
The round was led and underwritten by MTI Co., Ltd., an IT and cloud services company based in Tokyo, Japan. The company primarily focuses on providing a range of cloud services across key sectors. Its offerings include digital media and entertainment services, healthcare platforms like personal health records and online consultation tools, and school DX systems that streamline administrative operations.
Mutex Use of Funds
The company will use the funds to strengthen product development and enhance the organizational structure supporting its AI-powered medical claims platform, Reze.
About Mutex
Founded in 2022 and led by CEO Kohei Kumazawa, 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 centralizes prescription data, automates manual administrative tasks, prevents missed claims, and visualizes key management indicators. Headquartered in Tokyo, Japan, Mutex’s goal is to create a platform that significantly reduces the workload of medical departments and doctors, while optimizing revenue and driving digital transformation across entire medical institutions.
Funding Details
Company: Mutex Co., Ltd.
Raised: $0.4M
Round: Seed
Funding Date: December 2025
Lead Investor: MTI Co., Ltd.
Additional Investors:
Company Website: https://www.mutex-inc.dev/
Software Category: Healthcare SaaS / Medical Billing & Claims Automation
Source: https://prtimes.jp/main/html/rd/p/000000009.000133022.html