# Triple W USA (DFree)

> Triple W USA makes DFree, the first wearable ultrasound sensor that predicts when you need to use the bathroom. The matchbox-sized device sits on the lower abdomen, tracks bladder fullness in real time, and sends an alert to a phone or tablet before it is too late. Founded by Atsushi Nakanishi in 2015 and headquartered in San Diego, the company sells to individuals, caregivers, and senior care facilities under the banner of dignity and independent living - 'diaper-free.'

- **Founded:** 2015
- **Headquarters:** San Diego, California, United States
- **Founders:** Atsushi Nakanishi (Founder & CEO)
- **Team size:** Small (reported ~2 at the USA entity; broader Triple W group is larger across Tokyo and San Diego)
- **Products:** DFree (Personal), DFree Pro, D-Pad / Positioning Pad, DFree Bowel Sensor (prototype)
- **Notable:** Launched the world's first personal wearable bladder sensor (2018), Won 'Best of CES 2019' in the Digital Health category, Used by 500+ care facilities worldwide

## Products & services

- **DFree (Personal)** — A lightweight, non-invasive wearable ultrasound sensor worn on the lower abdomen that monitors bladder fullness in real time and alerts the user via a mobile app (iOS/Android) when it is time to go to the bathroom.
- **DFree Pro** — The senior-care version for facilities, adding a web dashboard so nurses and caregivers can monitor multiple residents' bladder patterns and plan toileting schedules.
- **D-Pad / Positioning Pad** — An accessory that helps keep the DFree sensor correctly positioned on the abdomen for consistent ultrasound readings.
- **DFree Bowel Sensor (prototype)** — A previewed next product aimed at bowel incontinence, extending the predictive sensor concept beyond the bladder.

## Achievements

- Launched the world's first personal wearable bladder sensor (2018)
- Won 'Best of CES 2019' in the Digital Health category
- Used by 500+ care facilities worldwide
- Endorsed by NAFC, Spina Bifida Association, and National MS Society
- Raised roughly $26M in total funding across rounds in Japan and the US

## Latest updates

- **2023-03** — Reported Series D financing (~$7.7M) per funding databases.
- **2021-01** — Launched next-generation, matchbox-sized personal bladder sensor.
- **2020-01** — Previewed a DFree bowel sensor prototype at CES 2020.
- **2019-09** — Launched the D-Pad positioning accessory for the DFree sensor.

## Links

- Website: https://www.dfreeus.biz
- LinkedIn: http://www.linkedin.com/company/dfreeus
- Twitter/X: https://twitter.com/DFreeUS
- Facebook: https://www.facebook.com/DFreeUS/

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Profile page: https://yespress.io/triple-w-usa
Published by YesPress — https://yespress.io
Last updated: 2026-06-10