www.digital.go.jp/policies/mynumber_contact
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マイナンバー制度に関するお問合せ｜デジタル庁
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https://www.digital.go.jp/policies/mynumber_contact
About this page
This page provides contact information for the My Number System operated by the Digital Agency. The My Number Hotline (0120-95-0178) handles eight service categories including My Number Card, electronic certificates, and My Portal. Operating hours are 9:30 AM-8:00 PM on weekdays and 9:30 AM-5:30 PM on weekends/holidays. Card suspension due to loss or theft is available 24/7. Alternative numbers for IP phone users and multilingual support in 10 languages are available. Relay service for hearing-impaired individuals is also offered.
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