IBM Japan Health Insurance Association

IBM Japan Health Insurance Association

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The Social Security and Tax Number System

POINT
  • The Social Security and Tax Number (Individual Number) is a unique 12-digit number assigned to every resident of Japan.
  • Beginning in January 2017, you will be required to enter your Social Security and Tax Number on application forms you submit to the Health Insurance Society.

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

  • 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.

Timetable for adopting the Social Security and Tax Number System

Starting January 2016, adoption of the Social Security and Tax Number will proceed steadily in administrative procedures for social security, tax, and disaster response.

[Timetable after notification of Social Security and Tax Numbers (planned)]
January 2016:
  • Distribution of Individual Number Cards begins.
  • Use of Social Security and Tax Numbers in administrative procedures for tax and social security related to National Health Insurance and employment insurance will start from this month.
January 2017:
  • Use of Social Security and Tax Numbers on notifications of social security matters related to health insurance and employees' pension insurance will begin.
  • Starting January 1, you must enter your Social Security and Tax Number on application forms involving eligibility and benefits that you submit to the Health Insurance Society. (On application forms related to benefits, you may enter either your Social Security and Tax Number or your health insurance card code/number.)
July 2017:
  • Linkage of information among national government agencies and other organizations will begin.
  • A system for disclosing records, including providing information (Maina Portal), will begin operating. You can use Maina Portal to relay your personal information online.
  • Linkage of information among parties, including health insurance societies (including insurers) and local governments, will begin.

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.

  • 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.

Related links

The Social Security and Tax Number System (Cabinet Secretariat)

The Social Security and Tax Number System (social security area) (Ministry of Health, Labour and Welfare)

The Social Security and Tax Number System (Public Relations Office of the Government of Japan)

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