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About My Number System

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As the foundation of the digital society, My Number System is an infrastructure for realizing a more fair and just society by improving the convenience of citizens and the efficiency of administration. Information coordination among administrative agencies in My Number System enables the omission of attached documents in various administrative procedures.

Table of Contents

1. My Number

It is a 12-digit number assigned to all Japanese residents who have resident records. My Number is used for administrative procedures stipulated by laws and regulations or ordinance, such as social security system, tax system, and disaster response. My Number makes it possible to identify individuals reliably and quickly. In addition, the number of required attached documents will be reduced by linking information among administrative agencies in administrative procedures, and administrative processing will be smoother, improving the convenience of citizens. In addition, necessary administrative support can be provided quickly to those who need it.

2. Systems in My Number System

2.1. Information coordination

Information coordination is the exchange of information necessary for administrative procedures between administrative agencies using a dedicated network system (information provision network system).
This makes it possible for citizens and residents to omit the submission of documents in various administrative procedures.

Related Documents

*For information on individual administrative procedures, please be sure to check the pamphlets, websites, etc. of each local government and administrative agency.

2. 2. public money receiving account Site Registry

This is a program in which citizens are required to voluntarily register their deposit accounts at financial institutions with the national government (Digital Agency) as accounts for receiving benefits.
Accounts that can be registered as a public money receiving account are savings accounts in the name of the individual * 1 and one account per person * 2. For targeted benefits, etc., please refer to the public money receiving account for benefits that can be received using the .

* 1 Bank account in the name of the individual
Only bank accounts in your own name can be registered in public money receiving account.
For example, you can't register a savings account in your parent's name as your child's public money receiving account.
* 2 One account per person
Only one savings account per person can be registered in public money receiving account.

When registering public money receiving account, please also read the Terms of Use for Registering Account Information and Using the Linkage System .

For details of the program, please refer to the public money receiving account Site Registry .

2.3. Deposit Account Numbering System

The system of assigning My Numbers to deposit and savings accounts (Deposit Account Number System) is a system in which My Numbers are reported to financial institutions.
By assigning a number to a savings account, the whereabouts of the savings account to which the My Number has been assigned can be confirmed at a single financial institution at the time of inheritance or disaster.
*The deposit and savings account numbering scheme differs from the "public money receiving account Registry Scheme," which requires each citizen to register with the national government (public money receiving account) one deposit and savings account that he / she currently holds at a financial institution as an account for receiving benefits, etc. Digital Agency

For details of the program, please refer to the Deposit Account Numbering Program .

2.4. Relevant information on My Number System

Materials and related information on the handling of My Number, etc.

Handling of Specific Personal Information

For proper handling of specific personal information (personal information that includes My Number), please refer to the following link.

Handling of My Number by financial institutions

*Materials prepared before the inauguration of Digital Agency are posted.

Provision of information by financial institutions (External link)

3. Safety precautions at My Number System

For My Number System security, in addition to institutional security measures (such as monitoring by identity verification and Personal Information Protection Commission), we have also taken system security measures (such as decentralized management of personal data and a mechanism that does not use the My Number itself for information coordination).

3.1. Institutional Safety Measures

  • It prohibits the collection and storage of personal information, including My Number, except for those provided for by law.
  • Personal Information Protection Commission, as a third party organization, will monitor and supervise whether specific personal information, including My Number, is being managed appropriately.
  • There will be heavy penalties if you break the law.
  • When providing your My Number, it is mandatory to verify your My Number and identify yourself. Therefore, you cannot immediately perform procedures using your My Number by impersonating yourself.
  • In the Mynaportal , the person can check the history of personal data exchanged between administrative agencies.

Related Documents

3.2. System Safety Measures

  • Personal information is not centrally managed, but rather each type of information is managed separately, as in the past, with pension information managed by pension offices and local tax information managed by municipalities.
  • When information is shared between administrative agencies, the My Number is not used directly, but instead a special code is used.
  • We restrict who can access the system and encrypt communications.

Related Documents

Calling Attention to My Number System Scams

Call centers, local governments, and consumer centers are receiving information on fraudulent solicitations using My Number System or attempts to obtain personal data through phone calls, e-mails, letters, and visits.

4. Recent Initiatives and Research on My Number System

4.1. Initiatives

My Number System expansion in the Act to Partially Amend the My Number Act

The scope of use of My Number will be expanded by the Act to Partially Amend the My Number Act, which was promulgated on June 9, 2023 (the date of enforcement will vary depending on the content).

  1. Expansion of the scope of My Number use
  2. Revision of regulations concerning the use of My Number and information coordination
  3. Integration of My Number Card and health insurance cards
  4. Promoting the Use of My Number Card
  5. Addition of "furigana for names" to entries in family registers, etc.
  6. Promotion of registration as a public money receiving account Site (establishment of a special scheme for registration via administrative organs, etc.)
Related Information

Law Concerning Partial Amendment to the Act on the Use of Numbers to Identify a Specific Individual in Administrative Procedures and Other Laws (Law No. 48 of 2023) (the Act to Partially Amend the My Number Act)

4.2. Research

Survey and research (commissioned survey) on initiatives, etc. regarding once only administrative procedures utilizing the common ID number system in other countries

Similar to My Number System, some other countries have introduced systems to identify specific individuals using numbers assigned to each citizen for the purpose of use in administrative procedures, etc. (hereinafter referred to as the "Single ID Number System"). In this survey, we surveyed the Single ID Number System in other countries and compiled the status of its utilization, specific mechanisms, and future trends.

5. Roadmap after the introduction of My Number System

The government will announce a roadmap for initiatives to expand the use of My Number System, My Number Card and Mynaportal.

6. Frequently Asked Questions

For frequently asked questions, we have compiled answers on the following page.

*For FAQs about the public money receiving account Site Registry, please refer to the public money receiving account Site Registry "Frequently Asked Questions (FAQ)".