マイナンバー（個人番号）制度・マイナンバーカード｜デジタル庁

This page is the Digital Agency's official information portal on the My Number system and My Number Card. My Number is an identification system for government procedures, enabling simplified administrative processes through information sharing between government agencies. The My Number Card can also be used for identity verification in private services. The page provides comprehensive information including card overview, application methods, usage scenarios, security measures, and validity period management. Recent updates include the launch of My Number Card functionality on iPhones and answers to questions about health insurance card usage. It also offers guidance for municipalities and private businesses on card utilization, along with authentication services and API services for enhanced digital convenience.