17-07-2025
Japan's Toto launches smart toilet that scans, analyzes stool
FUKUOKA -- Japanese toilet maker Toto Ltd. is this August releasing a home-use toilet which measures the amount, hardness and other elements of the user's stools.
In what's being called a Japan first, a scanner in the toilet bowl measures stools and a dedicated smartphone app can be used to track daily stool conditions. The device was developed in response to the growing number of users who pay attention to their stool's health indicators, as the Kitakyushu-based company aims to expand its reach to health-conscious consumers.
A sensor module is installed next to the warm-water cleaning nozzle inside the toilet bowl, operating on a principle similar to barcode scanning. It shines a light onto stool falling into the toilet, allowing the system to measure its properties. When a user sits on the seat, the scanner's cap opens and the unit activates. After the measurement, data is automatically sent to the smartphone app.
The system classifies stool into seven shapes and hardness types such as granular, banana-shaped or liquid, along with variations in surface texture, and further assigns one of three color categories: ochre, brown or dark brown. Stool quantity is categorized as high, medium or low. The app displays this data, allowing users to track frequency and condition via a calendar and receive personalized lifestyle advice based on trends in their bowel movements.
According to a Toto survey, while 76% of users check their stool condition after defecation, only 6% record the information digitally.
Since releasing the first "Washlet" bidet seat in 1980, Toto has continually refined features for cleanliness, comfort and water savings. In recent years, the company has shifted focus toward health, with product development targeting consumer well-being.
The new stool analysis function will be included in Toto's high-end "Neorest" models launching Aug. 1: the LS-W, priced from 542,300 yen (some $3,650), and the AS-W, from 493,900 yen (around $3,330). Toto aims to sell 7,300 units annually in the third year after their release.
(Japanese original by Hiroshi Hisano, Kyushu Business News Department)
