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FAQ: For local government who want to start using My Number Card (Japanese Public Key Infrastructure (JPKI))

Local government Frequently Asked Questions (FAQs).
In addition, we will expand the Frequently Asked Questions (FAQs) in the future.

Table of

  1. Preparation for using My Number Card (Japanese Public Key Infrastructure (JPKI))
  2. My Number Card
  3. E-Certificate
  4. Mynaportal
  5. Common Infrastructure and General-Purpose Tools for My Number Card Use

1. Preparation for using My Number Card (Japanese Public Key Infrastructure (JPKI))

Q1-1 What kind of procedures do I need to take to use Japanese Public Key Infrastructure (JPKI)?

A1-1

In order to use the Public Personal Authentication, there are platform operators that prepare and provide a system for it, and using this is one of the ways to use it as soon as possible, so we recommend that you consider it.
See the following page for a list of platform operators.

There are also guidelines for using Japanese Public Key Infrastructure (JPKI), so please take a look.

2. My Number Card

Q2-1: Do you have an overall plan to promote the use of My Number Card as a Digital Agency?

A2-1

There are three initiatives to expand the use of My Number Card. These three initiatives were announced by Conference on the Realization of the Digital Garden City Nation Vision at the 7th Minister for Digital Transformation held on April 27, 2022. The wide-ranging efforts to expand the use of My Number Card have been summarized into three initiatives, which can be said to be the grand design of My Number Card use. For details, please see the following linked materials.

Q2-2 What is the number of Issue tickets in My Number Card, and what is the ratio of the number of Issue tickets to the population?

A2-2

Please see the following page.

Q2-3 How can I use the My Number Card?

A2-3

My Number Card is roughly divided into 3 places to use.

  • Use of Card Certificate (Personal Identification Number)
  • Use of free space in IC chips
  • Use of E-Certificate (E-Certificate for signature, E-Certificate for user identification)

Use of Card Certificate (Personal Identification Number)
The front side can be used as an identification document at a contact point that requires identity confirmation, such as a financial institution, and the back side can be used when the presentation of the Individual Number is requested.
After the introduction of the My Number System, it will be necessary to present your personal identification number in many situations, such as employment, changing jobs, childbirth and childcare, illness, receiving a pensions, and disasters. In this case, if you have a My Number Card, you can confirm your number and identity with just one sheet.

Use of free space in IC chips
The IC chips of My Number Card have free areas in which independent services can be provided as specified by regulation for municipalities and prefectures, and as specified by the Minister for Internal Affairs and Communications for national institutions.

Use of free space in IC chips

  • City, town, ward, village: Seal registration certificate, convenience store Issue, certificate automatic Issue machine
  • Prefecture: User cards for prefectural libraries
  • Public authorities of the Country: Identification Functions for National Public Officers (Access Control)

Use of E-Certificate (E-Certificate for signature, E-Certificate for user identification)
The IC Chip of My Number Card stores two E-Certificate by Japanese Public Key Infrastructure (JPKI), which are "E-Certificate for Signature" and "E-Certificate for User Identification". For details, please refer to "3. Information on E-Certificate".

Q2-4. Is it possible to use the My Number Card to confirm your age?

A2-4

It is possible to use My Number Card to verify your age.

There are three main types of age verification.

  1. Method using JPKI-AP in My Number Card IC chips
  2. A method of using the auxiliary AP for entering the ticket surface in the IC chips of the My Number Card
  3. Method of reading certificate information with OCR

Please refer to the following table for details.

Pattern 1Pattern ②Pattern ③
My Number Card UsageJPKI AP (E-Certificate for Signature)Certificate Entry Auxiliary APCertificate information (read by OCR)
Available ToPlatform (PF) Operator / Service Provider (SP) OperatorAnyone can do it.
PIN entry required / not requiredRequired (6 to 16 alphanumeric characters)Required (14-digit number *)Not required
OverviewElectronic signatures and E-Certificate are received from users, and age verification is performed based on the date of birth of the four pieces of information obtained.(I) The information of the date of birth (or 4 information) is read by the certificate entry auxiliary AP, and the age confirmation is performed from the information. (ii) In this pattern, only the date of birth information can be obtained.The date of birth printed on the face of the My Number Card was read by the OCR function, and the age was confirmed.

Addendum
*For Pattern 2, Reference Number B (14 digits: 6 digits of the date of birth + 4 digits of the Christian era part of the expiration date + 4 digits of the security code) is required.

Q2-5 Is there a valid period for My Number Card?

A2-5

If you are 18 years old or older, it is until your 10th birthday from the issuance, and if you are less than 18 years old, it is until your 5th birthday from the issuance.

Q2-6 Can I continue to use My Number Card even if I move overseas?

A2-6

When you move overseas, you must return the My Number Card to local government. If you move overseas without returning the My Number Card to local government, the My Number Card will expire and you cannot continue to use it.
In addition, in order to start the continuous use of My Number Card outside Japan from June 2024, we are currently considering My Number Card Issue services at overseas diplomatic missions, and are renovating the Basic Resident Register System and the family registry Ticket System.

Q2-7 Could you please introduce examples of the use of My Number Card in local government?

A2-7

See the following page for examples of services using My Number Card on the Digital Agency website.

3. E-Certificate

Q3-1. What is E-Certificate?

A3-1

My Number Card IC chips have two E-Certificate for E-Certificate, "Japanese Public Key Infrastructure (JPKI) for User Identification" and "E-Certificate for Signature".
The "E-Certificate for user identification" can be used as a means to verify your identity. (You can log in to Mynaportal where you can view your information, use the certificate Issue service at convenience stores, and use it as a health insurance card.)
The "E-Certificate for Signature" contains four pieces of information: name, address, date of birth, and sex. When performing various procedures, you can automatically read and write these four pieces of information without entering them each time. (You can electronically sign your tax return on e-Tax or online application such as childcare in Mynaportal.)

Q3-2: What is the basis of the basic 4 information (name, address, sex, and date of birth) registered in the E-Certificate for signature?

A3-2

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

Q3-3 Is there a valid period for E-Certificate?

A3-3

Regardless of age, it is supposed to be until the 5th birthday from the issuance.

Q3-4: When do I need to renew my E-Certificate?

A3-4

After the expiration date, the function as a E-Certificate can no longer be used. Therefore, if you wish to continue using the service, you must renew it before the expiration date.
In addition, since the E-Certificate for signature holds the four basic information (name, address, sex, and date of birth), if the name or address is changed due to marriage or change of residence, etc., the function as the E-Certificate for signature cannot be used. Therefore, if you continue to use the local government for signature, you need to update it when you submit a notification of marriage or notification of moving in to the City of Tokyo.

Q3-5 When the E-Certificate is updated and the E-Certificate is changed, how is the identity before and after the update determined in the user authentication?

A3-5

Since January 2017, a service has been provided in which, subject to the consent of the user, if local government logs in with an unknown E-Certificate, local government queries the J-LIS about the previous E-Certificate, and the J-LIS responds to the inquiry, allowing local government to identify the same person (connection service between new and old E-Certificate).

Q3-6: Please provide an overview of the method of user verification that was established by the revision of the Public Personal Authentication Act (promulgated on June 9, 2023), which does not require electronic user identification with the entry of a personal identification number.

A3-6

Through the revision of the Public Personal Authentication Act, regulations have been established for methods that do not require the entry of a personal identification number (PIN) in My Number Card. The amended Act will come into effect on the day specified by Cabinet Order within a period not more than one year and three months from the date of promulgation (June 9, 2023).

Available environments and requirements

  • Use for face-to-face, etc. (In addition to face-to-face environments, environments in facilities and areas that are managed and monitored, environments of terminals that are lent to and managed by users. Online and outdoor are not allowed.)
  • Situations where the required authentication strength is low
  • for the second and subsequent use (For the first registration, it is necessary to affix an electronic signature and an electronic certificate for user identification, etc., and to enter a personal identification number, etc.)
  • Confirmation of the genuineness of My Number Card
  • Verification of Validity of E-Certificate for User Identification

As described above, there are the following common bases and general-purpose tools for making the use of My Number Card quick and inexpensive, including the use method without entering a personal identification number. See the following pages for details.

4. Mynaportal

Q4-1 What is Mynaportal?

A4-1

Mynaportal provides one stop services such as searching for administrative proceduer for child care, nursing care, etc., and applying online. My Number Card holders can also check their own information held by public authorities, etc., and check the content of notifications from public authorities, etc.
In addition, it is possible to cooperate (API cooperation) between private business, which provides various services, and systems for procedures such as social insurance and taxes.

Q4-2: How many times have you used Mynaportal?

A4-2

It was introduced at the "My Number System and National and Local Digital infrastructure Drastic Improvement Working Group (5th)" sponsored by Digital Agency. Please see the link below.

In addition, we plan to disclose My Number Card information, including the usage status of Mynaportal, in an easy-to-understand format from Digital Agency soon.

5. Common infrastructure and general-purpose tools for My Number Card use

Q5-1. What are the common infrastructure and general-purpose tools for using My Number Card?

A5-1

Please see the following page.