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About social security, tax number system (my number system)

Last update date December 12, 2023

What is Social Security and Tax Number System (My Number System)?

Image of My Number PR character Mina-chan
My Number PR character Mina-chan

Overview of the My Number System

The My Number System aims to improve administrative efficiency, improve the convenience of the people, and realize a fair and equitable society by introducing personal numbers (My Number) in the three fields of social security, tax, and disaster countermeasures. It is a system for.

Personal Number (My Number)

My Number is a 12-digit number for each person with resident certificate in Japan (including foreigners) in Japan.

Information linkage

Using a dedicated network system, information can be exchanged between different administrative organizations using a dedicated network system so that citizens can omit documents that had to be submitted in various administrative procedures. Was. The exchange of information is called "information linkage."

Safety measures for the My Number System

In the My Number system, various safety measures are taken in terms of system and system.

System
  • When providing My Number, strict identity verification (confirmation of My Number and Identification) is required to prevent spoofing.
  • Unless otherwise required by law, the collection or storage of personal information (specific personal information) including My Number is prohibited.
  • The Personal Information Protection Committee, a third-party organization, monitors and supervises the proper handling of specific personal information.
  • If you obtain or provide your My Number in "illegal" or "unjust" will result in severe penalties.
  • Regarding your specific personal information, you can check the information held by administrative agencies and the records of exchanges performed between administrative agencies, etc. on the minor portal.
System surface
  • Personal information is not centrally managed, but as before, pension's information is distributed and managed, such as in the pension office and local tax information is managed in a municipal office. As a result, information is not leaked to the potato ceremony.
  • When exchanging information between administrative agencies, etc., we do not use My Number directly. Use a dedicated code that cannot be decoded.
  • Information exchanged between government agencies is encrypted.

About minor portal

Minor Portal is an online service operated by the government.
Minor Portal: Service top page (external site)

What you can do with a minor portal

  • You can check your specific personal information held by administrative agencies and the records of your specific personal information exchanged between administrative agencies.
  • You can check the contents of administrative services related to child care.
  • In some administrative procedures, you can create an application form on the minor portal or make an electronic application.

How to use the minor portal?

In order to use the minor portal, you need a My Number card, IC card reader / writer, personal computer or smartphone.
For more information, please visit the website of the Digital Agency.
About Digital Agency Minor Portal (outside site)

Please be careful about fraudulent e-mails and suspicious inquiries that use the My Number system

About fraud email and fake sites (phishing scams)

The following e-mails and fake sites (phishing scams) that deceive the minor portal have been confirmed.
We will not contact you by e-mail or SMS from the relevant ministries or the city.

  • Suspicious e-mail with the subject, such as "Minor Point 2nd (*)" and "Information on Emergency Support Benefits for Prices of Electricity, Gas, Food Products, etc."
  • Guidance and payment deadlines for special sites such as "Minor Point Presents", "Emergency Support Benefit for Prices of Electricity, Gas, Food Products, etc.", "Emergency Support Benefits for Prices of Electricity, Gas, Food Products, etc.", etc. Email to contact

If you receive an unfamiliar email or suspicious email, never enter your personal information such as access to the URL in the email or your personal identification number.
Please delete the email as soon as possible.
 ※As of September 30, 2023, applications for the second minor points has been closed.
Digital Agency: Alert (external site) about fraudulent email and fake sites (phishing scams) that tricked the minor portal (external site)

About suspicious inquiry

In procedures such as notification and use of My Number and issuing a My Number Card, we do not ask for your account number or account PIN over the phone, nor do you request money or cash card.
In addition, we do not ask you to operate the ATM.
Please do not respond to telephone calls, letters, or visits with the nearest police department.
Ministry of Internal Affairs and Communications: Please be careful about unauthorized solicitation that took advantage of my number system and acquisition of personal information (outside site)

Those who have received suspicious calls

Telephone for police consultation

Phone number: #9110

  • Reception hours: From 8:30 am to 5:15 pm on weekdays (different at each prefectural police headquarters)
  • On Saturday, Sunday, public holidays and after hours, except for some prefectural police with a 24-hour reception system, we will respond on duty or voice guidance.
  • Call charges are borne by the user.
  • You will be connected to the police general counseling office of the prefectural police headquarters that has jurisdiction over the area where you called.
Consumer Affairs Agency: Consumer hotline

Phone number: 188

The Consumer Hotline will guide you to the nearest consumer affairs consultation desk.
Therefore, the time zone for consultation varies depending on the nearest consultation desk.

Person who wants to consult about the handling of personal information (specific personal information) that includes my number

Personal Information Protection Committee: My Number Complaint Mediation Consultation Service

Phone number: 03-6457-9585

Reception hours: From 9:30 am to 5:30 pm (excluding Saturday, Sunday, public holidays and the year-end and New Year holidays)

National web page on the My Number System

For inquiries to this page

Planning and Coordination Division, Planning and Coordination Department, Digital Management Division

Phone: 045-671-3792

Phone: 045-671-3792

Fax: 045-550-3610

Email address: di-kikaku@city.yokohama.jp

Return to the previous page

Page ID: 620-236-432

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