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SOXAI

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Contributing to improving the QoL of people around the world with technology

Yokohama, JapanFounded 2021Health Tech & Medtech
Valuation $25–50M Last recorded · 2024
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
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About SOXAI

SOXAI, a Japanese-based health-tech firm, was established in February 2021 by Dr. Tatsuhiko Watanabe. The company's name is a nod to the Japanese term "sokusai," meaning good health, with its logo inspired by the gourd, a traditional symbol for good health and fortune. Dr. Watanabe, who holds a Ph.D. in Engineering, leveraged his background as a research fellow at ETH Zurich and an R&D project manager for a global ICT company to found SOXAI. His expertise lies in micro-nanophotonics and non-invasive sensing devices, which forms the technological foundation of the company's core product.

The company's primary offering is the SOXAI RING, a smart ring designed for health management, which was developed and manufactured entirely in Japan. This device is marketed directly to consumers who are interested in monitoring and improving their health and wellness. The business operates on a direct-to-consumer model, with the ring being a one-time purchase without any mandatory monthly subscription fees for its accompanying mobile application. Since its service launch in October 2022, the company has seen significant growth, with sales reaching approximately 500 million yen in fiscal year 2023. To fuel further development and expansion, SOXAI has successfully raised a total of $6.43 million over two funding rounds, including a Series A round in June 2024 that brought in $5.55 million from investors such as Mizuho Capital, Sumitomo Life Insurance Company, and NTT Docomo Ventures.

The SOXAI RING is engineered to be unobtrusive, weighing around 3 grams, and is designed to be worn continuously, being waterproof up to 100 meters. It is equipped with multiple sensors, including an optical heart rate sensor, a blood oxygen level sensor, a skin temperature sensor, and a 3D accelerometer. These sensors collect vital data such as heart rate, heart rate variability, sleep patterns, and activity levels. The data is then analyzed by a proprietary algorithm and presented to the user through a mobile app, offering scores and personalized insights on sleep quality, stress levels, and overall condition. A key feature is its battery life, which can last up to nine days on a single charge, a considerable selling point compared to other wearable devices. The company emphasizes that wearing the ring on a finger can provide more accurate biometric data than wrist-worn devices due to stronger pulse wave signals.

Source: Dealroom company data

At a glance

Founded
2021
Headquarters
Yokohama, Japan
Sector
Health Tech & Medtech

Investors

10 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed3 investors entered at this stage

  • TechAccel Ventures
  • Sparx Group
  • PKSHA Capital

Series A7 investors entered at this stage

  • Mizuho Capital
  • Paramount Bed
  • Sumitomo Life Insurance Company
  • Future Venture Capital
  • TENTIAL
  • Hakuhodo DY Ventures
  • NTT DOCOMO Ventures
Team profiled 2 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 2 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
🇯🇵 Japan · Yokohama HQ
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Market sentiment

Posts on X, past 7 days

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Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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