# AT Nakanishi

> AT Nakanishi (Atsushi Nakanishi) is the founder and CEO of Triple W, the company behind DFree, the world's first personal wearable ultrasound sensor that predicts toilet timing. He launched the company in 2015 with high school and college friends, took it from Tokyo to Berkeley, and steered it to a Best of CES award and Series D funding. A self-described non-engineer who built a hardware company from zero, Nakanishi blends business pragmatism with a stubborn focus on solving an unglamorous, very human problem.

- **Role:** Founder & CEO at Triple W (DFree)
- **Organizations:** Triple W Japan, Triple W USA, DFree
- **From:** Japan
- **Nationality:** Japanese
- **Education:** Finance and Global Business Management, University of California, Berkeley (Haas), Business, University (undergraduate, business)
- **Known for:** Founded and scaled Triple W from zero to a global hardware company., Shipped the world's first personal wearable bladder sensor (DFree)., Won Best of CES 2019 in the Digital Health category.

## Career timeline

- **2013-2014** — Studied finance and global business management at UC Berkeley, where the idea for DFree took shape.
- **2015** — Founded Triple W in Japan with high school and college friends.
- **2017** — Began commercial rollout of DFree in Japan and Europe.
- **2018** — Launched DFree in the United States, the world's first personal bladder sensor.
- **2019** — DFree named Best of CES in the Digital Health category.
- **2023** — Triple W raised a Series D round; total funding surpassed $26M.

## Achievements

- Founded and scaled Triple W from zero to a global hardware company.
- Shipped the world's first personal wearable bladder sensor (DFree).
- Won Best of CES 2019 in the Digital Health category.
- Expanded the product from Japan to Europe and the United States.
- Raised over $26M across funding rounds, including a Series D.

## Latest updates

- **2023-03** — Triple W closed a Series D round, pushing total funding past $26M.

## Links

- Website: https://dfreeus.biz
- LinkedIn: http://www.linkedin.com/in/at-nakanishi-9438038b
- Twitter/X: https://twitter.com/DFreeUS
- Facebook: https://www.facebook.com/DFreeUS/

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Profile page: https://yespress.io/at-nakanishi
Published by YesPress — https://yespress.io
Last updated: 2026-06-14