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Current Affairs

Is baby hungry, sleepy or just unhappy? These Japanese apps help interpret cries

Crying without a clear reason can be a major source of anxiety for parents. As families look for new ways to navigate the uncertainty of…

By Samantha Johnson / June 12, 2026
Crying without a clear reason can be a major source of anxiety for parents. As families look for new ways to navigate the uncertainty of early childcare, Japanese developers are rolling out AI-powered tools designed to identify the possible causes of a baby’s distress.

One of them is Babylingual, a free app released in March by Moto Numazawa, a 25-year-old father in the Kanagawa prefecture city of Chigasaki, near Tokyo.

In late April, Numazawa held his smartphone up to his three-month-old son, Saku. Seconds later, the app displayed the message: “I’m hungry.”

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Alongside the result, the screen showed a gauge indicating the likelihood of that interpretation compared with other possible needs and advised: “It might be feeding time.”

By that point, three hours had passed since Saku’s morning feeding. After being fed, he quickly fell asleep in the arms of his mother, Yu.

A Babylingual screen shows a gauge indicating the likelihood of an interpretation. Photo: Kyodo
A Babylingual screen shows a gauge indicating the likelihood of an interpretation. Photo: Kyodo

Babylingual applies previous research suggesting babies make distinct vocalisations in response to needs such as hunger and sleep, classifying cries into five patterns.

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