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民間事業者に対してマイナンバーカード（ICチップ）の空き領域の利用に関する告示を行いました｜デジタル庁

https://www.digital.go.jp/news/xp4mV1ce

April 7, 2026 at 09:04 PM JST•The archive page, viewer, and downloads use this saved version.

April 7, 2026 at 09:04 PM JST·www.digital.go.jp

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民間事業者に対してマイナンバーカード（ICチップ）の空き領域の利用に関する告示を行いました｜デジタル庁

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Original URLhttps://www.digital.go.jp/news/xp4mV1ce

StartedApril 7, 2026 at 09:04 PM JST

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This page announces the Digital Agency's notification regarding the use of vacant areas in My Number Card IC chips. On February 4, 2022, four companies—Japan Post, Japan Post Service Co., Ltd., Japan Post Bank, and Kampo Life Insurance—were authorized to install applications in the vacant space of My Number Card IC chips. This enables private businesses to utilize My Number Cards for various operations. The target companies plan to use the cards for building access control, security authentication, and key management systems for internal use.

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