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About My Number System

As the foundation of My Number System, digital society is an infrastructure for realizing a more fair and just society by promoting the convenience of the people and the efficiency of the administration at the same time. By information linkages between public authorities, etc. in My Number System, it is possible to omit attached documents in various administrative procedures.

Table of

1. My Number

It is a 12-digit number assigned to all residents with a certificate of residence. The My Number is used for administrative procedures specified by law or regulation, such as social security system, tax system, and disaster response. The My Number makes it possible to identify individuals accurately and quickly. In addition, in administrative procedures, information linkages between public authorities, etc. reduces the number of necessary documents to be attached, smoothens administrative processing, and improves convenience for citizens. In addition, necessary administrative support can be provided quickly to those who need it.

2. Explanation of systems in My Number System

2.1. information linkages

Information linkages is the exchange of information necessary for administrative procedures between public authorities, etc. 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 Materials

*For guidance on individual administrative procedures, please be sure to check the pamphlet, website, etc. of each local governments and public authorities.

2. 2. public fund receiving account Registry

Under this program, citizens are required to voluntarily register their savings accounts at financial institutions with the national government (benefit) as accounts for receiving money from Digital Agency, etc.
The account that can be registered as a public fund receiving account is a deposit account in the name of the person * 1 and one account per person * 2. For eligible benefit, etc., please see public fund receiving account, etc., which can be received using benefit .

* 1 Deposit account in the name of the principal
The only bank account that can be registered with public fund receiving account is the bank account in the name of the person.
For example, you cannot register a savings account in your parent's name as your child's public fund receiving account.
* 2 One account per person
Only one deposit account per person can be registered with public fund receiving account.

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

For details, please refer to public fund receiving account Registry .

Public relations materials

2.3. Deposit and Savings Account Numbering System

The system for assigning My Numbers to deposit accounts (deposit account numbering system) is a system for notifying financial institutions of My Numbers.
By numbering bank accounts, from around the end of fiscal 2024 (planned), it will be possible to check the location of bank accounts to which My Number has been assigned at a single financial institution window in the event of an inheritance or disaster.
*The deposit account numbering system is different from the "public fund receiving account Registration System." The "public fund receiving account Registration System" is a system in which citizens are required to register their current deposit accounts with financial institutions with the national government (Digital Agency) as accounts for receiving benefit, etc. one account per person.

Public relations materials

Related Information

2.4. Related Information on My Number System

Materials and related information on the handling of My Number are posted.

Treatment of Specified personal data

For the proper treatment of a specific personal data (a personal data that includes the My Number), please see the following link.

Handling of My Number at Financial Institutions

*Materials created before the establishment of Digital Agency are posted.

Provision of information by financial organizations (external links)

3. Safety Measures at My Number System

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

3.1. Institutional safety measures

  • It is prohibited to collect or store personal data including My Number except for those regulated by law.
  • The Personal Information Protection Commission, which is a third party organization, monitors and supervises whether specific personal data, including My Number, is properly managed.
  • If you violate the law, you will face heavy penalties.
  • Since confirmation of the My Number and confirmation of identity are required when providing the My Number, it is not possible to immediately perform procedures using the My Number upon spoofs.
  • At Mynaportal , you can confirm the history of public authorities exchanged between personal data, etc.

Related Materials

3.2. System safety measures

  • Instead of centralized management of personal data, each information is managed in a distributed manner, such as pensions offices for pensions information and municipalities for local tax information, as in the past.
  • When making a information linkages between public authorities, etc., we do not use the My Number directly, but use a special code.
  • We restrict who can access the system and encrypt communications.

Related Materials

Raising awareness of scams taking advantage of My Number System

Call centers, local governments, and consumer centers are receiving information about calls, emails, letters, and visits that attempt to take advantage of My Number System to illegally solicit or obtain personal data.

4. Recent Efforts and Research on My Number System

4.1. Efforts

Expansion of My Number System in the Act to Partially Amend the My Number Act

The the Act to Partially Amend the My Number Act, which was promulgated on June 9, 2023, aims to expand the scope of use of My Number (the date of enforcement varies depending on the content).

  1. Expansion of the scope of use of My Number
  2. Review of regulations on the use of My Number and information linkages
  3. Unification of My Number Card and health insurance card
  4. Promoting the spread and use of My Number Card
  5. Addition of "Furigana of Name" to Matters to be Entered in family registry, etc.
  6. Registration of public money receiving account Promotion (Establishment of a Special Case for Registration via public authorities, etc.)
Related Information

Act for Partial Revision of the Act on the Use of Numbers to Identify Specific Individuals in Administrative Procedures (Act No. 48 of 2023) (the Act to Partially Amend the My Number Act)

4.2. Research and study

Survey and research on initiatives related to one time use of administrative procedures using the common number system in foreign countries (commissioned survey)

Similar to My Number System, some foreign countries have introduced systems to identify specific individuals by using numbers, etc. assigned to each citizen for the purpose of using them in administrative procedures, etc. (hereinafter referred to as the "Common Number System"). In this survey, we surveyed the common number systems in foreign countries and summarized the status of their utilization, specific mechanisms, and future trends.

5. My Number System Post-Implementation Roadmap

We will announce a roadmap for initiatives such as expanding the use of My Number System, My Number Card, and Mynaportal.

6. Frequently Asked Questions

Answers to frequently asked questions are listed on the following pages.

*For FAQs about the public fund receiving account Registry, visit the public fund receiving account Registry Frequently Asked Questions (FAQs).