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Frequently Asked Questions: My Number Card Utilization for Local Governments

Last Updated:

Contains frequently asked questions (FAQs) for local governments.

Contents

  1. My Number Card
  2. Japanese Public Key Infrastructure (JPKI)
  3. Mynaportal
  4. Other

FAQ

1. My Number Card

Q1-1 What are the number of issue tickets and the ratio of issue tickets to population in My Number Card?

A1-1

Please confirm the issue status in My Number Card (Ministry of Internal Affairs and Communications) from .

Q1-2 How can I use the My Number Card?

A1-2

There are three main ways to use it.

  • Use of the card face
  • Use of electronic certification (electronic certification for signing, electronic certification for user certification)
  • Use of free space on IC chips
Use of the card face

The front side can be used as a identity verification document at financial institutions that require a identity verification, such as the counter. The back side can be used when you are asked to present your Individual Number. After the introduction of the My Number System, it will be necessary to present your Individual Number in many situations, such as getting a job, changing jobs, giving birth to a child, getting sick, receiving a pension, and disasters. In that case, if you have a My Number Card, you can confirm your Individual Number and make a identity verification with just one card.

Use of electronic certification (electronic certification for signing, electronic certification for user certification)

The IC chips of the My Number Card are equipped with two electronic certification for Japanese Public Key Infrastructure, "electronic certification for signature" and "electronic certification for user certificate". For details of electronic certification, please check Q2-1 What is? Please check from .

Use of free space on IC chips

The IC chips in the My Number Card have empty areas, which are designated by the ordinance for municipalities and prefectures, and by the Minister for Internal Affairs and Communications for national institutions. Each of these areas can provide its own services.

For details, please see [Material 1] Promoting the Dissemination and Utilization of My Number Card (Basic Information) (PDF / 10,325 kb) P4 of .

Q1-3 Is it possible to verify my age using My Number Card?

A1-3

It is possible to verify your age using the functions of My Number Card.
There are three main ways to do age verification.

  • Method 1: Using JPKI-AP in IC chips in My Number Card
  • Method 2: A method of using an auxiliary AP for inputting a ticket surface in an IC chip of a My Number Card
  • Method 3: Using OCR to Read Ticket Information

Please refer to the table below for details.

Method 1Method 2Method 3
Functions of My Number CardJPKI-AP (electronic certification for signature)Auxiliary AP for entry of information on the faceTicket information (read by OCR)
Available ToPlatform (PF) Operator / Service Provider (SP) OperatorAnyone can
PIN entry requiredRequired (6 to 16 alphanumeric characters)Required (14-digit number *)Not required
OverviewElectronic signatures and electronic certification are received from users, and age verification is performed based on the date of birth of the four pieces of information acquired. The date of birth information (or 4 information) is read by the auxiliary AP for entry of information on the face of the ticket, and age is confirmed from the information. With this method, only the date of birth information can be obtained. The date of birth printed on the My Number Card is read by the OCR function and age is confirmed.

* In the case of "Method 2: Using the auxiliary AP on the IC chip of the My Number Card," the collation number B (14-digit number: 6 digits of the date of birth + 4 digits of the expiration date part + 4 digits of the security code) is required at the time of data acquisition.

Q1-4 Could you give us some examples of how My Number Card is being used?

A1-4

Please check the following page.

Q1-5 Is there a validity period for the My Number Card?

A1-5

It's supposed to be until the 10th birthday from the issuance if you are over 18 years old, and until the 5th birthday from the issuance if you are under 18 years old.

Q1-6 Can I continue to use the My Number Card if I move out of the country?

A1-6

Since May 27, 2024 (2024), Japanese nationals have been able to continue to use My Number Card after leaving Japan. In addition, Japanese nationals residing outside Japan who do not currently have a My Number Card (limited to those who moved out of Japan on or after October 5, 2015) can also apply for a My Number Card.

Q1-7 Are there any measures or mechanisms to prevent "spoofing" and "third party use"?

A1-7

When using the electronic certification of the My Number Card, a security code is required, and if you make a mistake a certain number of times, it will be locked. In addition, we have taken high security measures, such as adopting a mechanism in which the chip breaks if you try to forcibly remove information from the IC chip, and personal data will not be leaked due to the loss or theft of the card. If you lose your card, you can temporarily suspend the use of the My Number Card by contacting the My Number general toll-free number (0120-95-0178), which is available 24 hours a day, 365 days a year (Reference: for inquiries about the My Number System).

Q1-8: When will "furigana" be printed on My Number Card tickets?

A1-8

With the promulgation of "the Act to Partially Amend the My Number Act" in June 2023 (2023), which requires the use of Furigana in family registers, "Furigana in Name" will be recorded and entered in My Number Card. Necessary preparations are being made for its enforcement in order to realize the use of Furigana in My Number Card within three years after its promulgation.

Q1-9: What else is stored in IC chips in My Number Card other than electronic certification, and how are they used?

A1-9

In addition to the electronic certification, the AP configuration of the IC chips includes a ticket AP, a supplementary ticket AP, and a basic AP, which can be used for automatic online entry of names, addresses, etc.

For details, please see [Material 1] Promoting the Dissemination and Utilization of My Number Card (Basic Information) (PDF / 10,325 kb) P4 of .

Q1-10 What information do I need to use My Number Card?

A1-10

Technical information on the introduction of My Number Card utilization information service for local governments Please check it from .

2. Japanese Public Key Infrastructure (JPKI)

Q2-1 What is? Please check from

A2-1

The IC chips of the My Number Card are equipped with two electronic certification for Japanese Public Key Infrastructure, "electronic certification for signature" and "electronic certification for user certification".

  • Electronic certification for signature
    Your name, address, date of birth, and gender are the four pieces of information that will be entered in the e-Tax Return. When you go through the various procedures, you can automatically read and write out these four pieces of information without having to enter them each time. (You can use an e-signature when filing an e-Tax Final Return or at a online application such as Child Care in Mynaportal.)
  • Electronic certification for user certification
    It can be used as a means to prove your identity. (You can log in to the Mynaportal where you can view your information, use the issue service at convenience stores, or use it as a health insurance card.)

Q2-2 Is there a validity period for the electronic certification?

A2-2

Regardless of the age, it is supposed to be until the fifth birthday from the issuance.

Q2-3 When do I need to renew my electronic certification?

A2-3

Once the valid period expires, the function as a electronic certification cannot be used. Therefore, if the electronic certification is to be used continuously, it must be renewed before the valid period expires. In addition, since the electronic certification for signature retains the four basic information (name, address, sex, and date of birth), if the name or address is changed due to marriage or relocation, etc., the function as a residence for signature cannot be used. Therefore, if the residence is to be used continuously, it must be renewed when the notification of marriage or notification of moving in is submitted to the local government.

Q2-4 When does a electronic certification expire?

A2-4

Japanese Public Key Infrastructure (JPKI) (5.1.1. Expiration Conditions for electronic certification) Please check from .

Q2-5 What kind of procedures do I need to follow to use Japanese Public Key Infrastructure?

A2-5

Japanese Public Key Infrastructure (JPKI) (3. How to introduce the service) Please check from . Utilizing the service provided by the platform business operator is one of the ways to use it quickly, so I recommend you to consider it. For details of the platform business operator and introduction examples, please check from Platform Business Operator List and Example List .

Q2-6 Based on what are the basic 4 information (name, address, sex and date of birth) registered in electronic certification for signature?

A2-6

It is based on the resident record managed by the local government.

Q2-7 If the electronic certification is updated and the electronic certification changes, how does the user authorization determine the identity before and after the update?

A2-7

Since January 2017, with the user's consent, when a user logs in at a electronic certification unknown to the local government, the local government asks J-LIS (Japan Agency for Local Authority Information Systems) about the electronic certification of the previous generation, J-LIS answers the question, and the local government can grasp the identity of the user (new and old electronic certification connection service).

Q2-8 Where is "death" included in the reasons for electronic certification revocation in Japanese Public Key Infrastructure?

A2-8

Death is included in the forfeiture reason of "affectationChanged." As My Number Card continued to be used overseas from May 27, 2024 (2024), the forfeiture of electronic certification due to moving overseas was eliminated, and the forfeiture reason was mostly death.

Q2-9: Please provide an overview of the method of user confirmation without electronic user identification that requires the input of a personal identification number, which was established by the revision of the Public Personal Authentication Act (promulgated on June 9, 2023).

A2-9

With the amendment of the Public Personal Authentication Law, regulations have been put in place regarding the use of "Kazashi", which does not require the entry of a personal identification number (PIN), for identity verification by My Number Card. Please refer to the following pages for details.

3. Mynaportal

Q3-1 What is Mynaportal?

A3-1

What is Mynaportal? (Mynaportal) Please check from .

Q3-2 I would like to use the Mynaportal API, how do I do that?

A3-2

What are the "Mynaportal APIs"? (Mynaportal) Please check from .

4. Others

Q4-1 What is Digital Authentication App?

A4-1

Please check from Digital Authentication App (Digital Agency Web Service Application) .

Q4-2 What is the My Key Platform?

A4-2

Please check from Mikey Platform .