Stage: Materials research and prototype; commercial availability unconfirmed
Tohoku University’s technology-seed catalogue identifies smart diapers as an application for gas-sensing materials. Its record was updated on July 4, 2025; the catalogue’s initial publication date is not established.
An additional Japanese university announcement dated December 25, 2024 reports joint work by Tohoku University, Japan Advanced Institute of Science and Technology and Osaka University, including a diaper-sensor prototype distinguishing urine- and stool-related signals through different gas responses. The paper appeared online on December 19, 2024. This supports a research prototype, not a marketed product or clinically validated performance.