About us

About

Our story.

The Founder

Fujioka Toshio

In the serene hills of Kyoto, Japan, Fujioka Toshio found inspiration in an ancient wellness ritual—immersing in cold mountain water. After years of managing his family’s traditional hot spring inn, Toshio experienced firsthand the profound physical and mental benefits of cold immersion.

In 2022, he founded ONZEN, a premium cold plunge product that blends Japan’s timeless wellness traditions with modern engineering.

Toshio envisioned ONZEN as more than just a recovery tool; he saw it as a personal sanctuary for renewal. To bring this vision to life, he assembled a team of Japan’s top engineers and designers, renowned for their precision and craftsmanship. Together, they crafted a product both beautiful and functional.

ONZEN’s wooden design, inspired by the natural forests of Kyoto, allows it to fit seamlessly into any outdoor or indoor setting.

It's advanced temperature control system ensures users can customize their experience, providing consistent therapeutic cold at the touch of a button.

But ONZEN’s true value lies in its philosophy. For Toshio, cold immersion is a way to cleanse both body and mind, offering a moment of clarity and focus in an increasingly chaotic world. ONZEN is designed to help users build physical resilience and mental strength through regular practice.

Embrace a lifestyle of wellness and renewal, inspired by Japan’s ancient traditions and crafted by its finest artisans. Experience the power of cold therapy with ONZEN and emerge stronger, clearer, and more vibrant than ever.

Our research team

  • Dr. Soma Hachiro

    Physical Medicine and Rehabilitation (PM&R) Physician

  • Dr. Nakatomi Asami

    Physiotherapist

  • Dr. Miyasato Masashi

    Emergency Medicine Physician

  • Dr. Shishido Momoko

    Hydrotherapist

  • Dr. Sunada Kyoko

    Neuroscientist

  • Dr. Oshita Hikaru

    Biomedical Engineer

  • Dr. Tahara Moriko

    Something Something

  • Dr. Inouye Hiroyuki

    Electrical Engineer

Simplicity, balance, and tranquility.

The wood used in our product reflects the natural materials of Kyoto’s forested surroundings, evoking the calming presence of nature.

Harmony between nature and technology.

The ONZEN's engineering honors the traditional Japanese techniques of precision craftsmanship, integrating modern innovation with a deep respect for nature.

Our mission is to help people live better.

Part of our company's logo reads:

より良い生活へ

which means:

To a better life

This is our company motto. It drives us to build a product that helps people everywhere.

Real transformation.

5 Things  You Need To Know About Cold Plunging
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