www.soumu.go.jp/kojinbango_card/01.html

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総務省｜マイナンバー制度とマイナンバーカード｜マイナンバー制度

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https://www.soumu.go.jp/kojinbango_card/01.html

About this page

This page explains the My Number System in Japan, a social infrastructure for administrative efficiency, improved public convenience, and fair society realization. Since October 2015, residents have been notified of their 12-digit My Number. The system streamlines procedures by reducing required documents across multiple agencies. It enables information sharing between government bodies, preventing tax and welfare fraud. Obtaining a My Number Card provides single-document verification for both identity and number confirmation. My Portal, an online government service, allows one-stop processing for childcare-related procedures and automatic delivery of administrative notices.