The Social Security and Tax Number System
- The Social Security and Tax Number (Individual Number) is a unique 12-digit number assigned to every resident of Japan.
- Note that certain application forms submitted to the Health Insurance Society require entry of the Social Security and Tax Number.
Notice concerning the use of a Social Security and Tax Number Card as an insurance card
See here regarding inquiries about the Social Security and Tax Number System.
Social Security and Tax Number toll-free general hotline
0120-95-0178
Hours: 9:30 am - 8:00 pm M-F, 9:30 am - 5:30 pm weekends (not including New Year’s and year-end holidays)
Adoption of the Social Security and Tax Number System
Under the Social Security and Tax Number System, every person registered on a certificate of residence will be assigned a 12-digit Individual Number (Social Security and Tax Number). This will make it possible to accurately and efficiently link information for individuals across the domains of social security, tax, and disaster response.
Purpose of adoption of the Social Security and Tax Number System
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Administrative efficiency
The system will greatly reduce the time and effort required by national administrative agencies, local governments, and other organizations for various activities, including checking, transferring, and entering various types of information. By better linking multiple operations, the system will eliminate task duplication and other inefficiencies. -
Realizing a fair and equitable society
The system will make it easier to ascertain income and benefits received from other administrative services. This, in turn, will help prevent cases of unjustified avoidance of burdens or inappropriate receipt of benefits, while providing comprehensive assistance to those who really need it. -
Improving convenience to the public
The system will simplify various administrative procedures and reduce the burden for the public - for example, by reducing the need to attach documents. The system will also allow members of the public to check the information concerning them held by administrative agencies and to receive notifications of and learn about various services such agencies can provide.
Social Security and Tax Number Card (Individual Number Card)
The Social Security and Tax Number Card is a plastic card with an embedded IC chip. The front indicates the bearer's name, address, date of birth, gender, and facial photograph. The rear indicates the bearer's Social Security and Tax Number.
This card can be used as an ID card and to access various services (e.g., local government services, e-Tax and other electronic filing systems using digital certificates).
To apply for issuance, contact your municipal government.
You can use your Individual Number Card as a health insurance card
The amended Health Insurance Act promulgated in May 2019 introduced a system that lets you use your Social Security and Tax Number Card (Individual Number Card) as a health insurance card (online eligibility verification system), starting in March 2021. This system became fully operational on October 20, 2021.
You can use your Individual Number Card as a health insurance card to verify various eligibility information-for example, the health insurer providing coverage-at medical care institutions and other facilities that have adopted the online eligibility verification system.
You must register on the Mynaportal site etc. before using your Individual Number Card as your health insurance card. See here for more information.
Using your Individual Number Card as your health insurance card (Mynaportal)
You can register in advance using a Seven Bank ATM or a card reader with facial authentication at a medical care institution or pharmacy.
How to apply at a Seven Bank ATM (Seven Bank)
- Reference link
About online eligibility verification
Online verification of eligibility is a system that makes it possible to verify eligibility information online using the Individual Number Card, etc.
- * Medical care institutions and other facilities do not handle patients’ (12-digit) Social Security and Tax Numbers directly. Instead, they use the IC chips on Individual Number Cards.
- * An Individual Number Card cannot be used as a health insurance card at medical care institutions and other facilities that have yet to adopt the online eligibility verification system.
Advantages:
If you use a Myna health insurance card, you can continue to receive medical care using your Individual Number Card even after you start a new job, change jobs, or move to a new residence. (Note that you still need to apply to join a health insurance society.)
Even if you do not prepare a Certificate of Application of Maximum Copayment Amount or similar document in advance, by using a Myna health insurance card you will be exempt from payments beyond the maximum copayment amount under the High-Cost Medical Care Benefits system, because your cost-sharing maximum amount information will be provided with no need to give your consent.
Mynaportal is now more convenient to use. With Mynaportal, you can review your specific health checkup information, prescription information, and medical care cost information. You can also enter the medical care cost information required to claim medical expenses deductions on your income tax return.
Schedule for linkage to Individual Number Card
| April 2023 | Medical care institutions, pharmacies, etc. are in principle required to adopt the online eligibility verification system. |
|---|---|
| December 2, 2024 | Integration of Individual Number Card and health insurance card. Use of current health insurance cards was abolished and they are no longer newly issued.
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| December 1, 2025 | End of the transitional period after abolition of health insurance cards |
Individual Number Card acceptance
Medical care institutions and other facilities that accept Individual Number Cards registered for use as health insurance cards display posters and stickers indicating "マイナ受付 (Myna health insurance cards accepted)."
Account registration system for receipt of public funds
The account registration system for receipt of public funds is a voluntary system for registering your savings account with a financial institution with the Japanese government (Digital Agency) as a personal account for receiving benefits and other funds.
After registering your account, you will no longer need to enter the name of a financial institution or account number when applying or completing other procedures for health insurance and other benefits.
You can register an account for receiving public funds at Mynaportal.
- Reference link
- Reference link
Subject health insurance benefits etc.
- Inpatient Meal Expenses, Inpatient Living Expenses, medical care expenses, Home-Visit Nursing Care Expenses, and Transportation Expenses
- Payment of Injury and Sickness Allowance
- Payment of Funeral Expenses
- Payment of Childbirth and Childcare Lump-Sum Grant
- Payment of Maternity Allowance
- Payment of Dependents’ Medical Care Expenses, Dependents’ Home-Visit Nursing Care Expenses, and Dependents’ Transportation Expenses
- Payment of Dependents’ Funeral Expenses
- Payment of Dependents’ Childbirth and Childcare Lump-Sum Grant
- Payment of High-Cost Medical Care Benefits and High Aggregate Cost for Long-Term Care Service
- Additional benefits stipulated in the health insurance society's constitution
- Refunds of insurance premiums paid by Voluntarily and Continuously Insured Persons and Special-Case Retired Insured Persons
Handling of Social Security and Tax Numbers and specific personal information
Social Security and Tax Numbers and personal information containing these numbers ( "specific personal information" hereinafter) may not be used for purposes other than those specified by law.
Restrictions apply to the use, provision, and collection of Social Security and Tax Numbers.
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Scope of use of Social Security and Tax Numbers
By law, use of the numbers is restricted to administrative procedures related to social security, tax, and disaster response. -
Requests to provide Social Security and Tax Numbers
The individuals concerned and others can only be asked to provide Social Security and Tax Numbers when this information is necessary to prepare documents for procedures involving social security and tax matters. -
Restrictions on requests to provide Social Security and Tax Numbers and on provision and collection of specific personal information
Requesting or collecting Social Security and Tax Numbers and specific personal information or providing this information to others is prohibited except in accordance with restrictions set forth under law.
The Health Insurance Society will handle Social Security and Tax Numbers as a Person in Charge of Affairs Using the Individual Number.
A Person in Charge of Affairs Using the Individual Number is a national administrative agency, a local government, an independent administrative agency, or other organization that uses Social Security and Tax Numbers in their processing of administrative procedures, as established in Appended Table 1 of the Act on the Use of Numbers to Identify a Specific Individual in the Administrative Procedure and relevant ordinances.
As a Person in Charge of Affairs Using the Individual Number, the Health Insurance Society will use Social Security and Tax Numbers solely within the scope of such administrative procedures.
Announcement of Specific Personal Information Protection Assessment
As part of efforts to protect personal information, the Social Security and Tax Number System requires Specific Personal Information Protection Assessments of implementing organizations. For these assessments, the organizations must estimate the potential consequences of leaks of specific personal information and other events on privacy and the other rights and interests of individuals; analyze the potential risk of the occurrence of such leaks and other events; and take appropriate measures to mitigate such risks. It also requires the organizations to declare the implementation of these tasks through assessment reports.
Listed below are the assessment reports currently issued by the Health Insurance Society on issues related to the protection of specific personal information:
Assessment report on basic items
| Assessment report no. | Assessment report title |
|---|---|
| 1 |