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Novel Coronavirus COVID-19 contact-tracing app (COCOA)｜Digital Agency

https://www.digital.go.jp/en/policies/cocoa

April 7, 2026 at 07:02 PM JST•The archive page, viewer, and downloads use this saved version.

April 7, 2026 at 07:02 PM JST·www.digital.go.jp

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Novel Coronavirus COVID-19 contact-tracing app (COCOA)｜Digital Agency

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Original URLhttps://www.digital.go.jp/en/policies/cocoa

StartedApril 7, 2026 at 07:02 PM JST

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This page describes the COVID-19 contact-tracing app (COCOA) developed by Japan's Digital Agency in cooperation with the Ministry of Health, Labor and Welfare. COCOA was designed to prevent the spread of COVID-19 through contact notification. Initially facing operational issues, a cooperation team was established in February 2021 to address problems and improve functions. The app suspended its contact notification function in November 2022 due to limitations on positive result registrations and changes in COVID-19 case notification policies.

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