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Family membership

Health insurance provides insurance benefits not just to insured persons but also to their dependent family members. These family members are referred to as “dependents”. Family members must meet certain conditions related to “residency in Japan,” “the extent of the family relationship,” and “income” before they are authorized as dependents.

Adding a family member

Steps from application to certification

  1. STEP1Submission of documents: The insured person fills out/obtains the documents needed to apply and submits them to the employer’s section in charge of social insurance operations.
  2. STEP2Transfer of documents: The employer reviews the documents, affixes its seal, and submits the documents to the Health Insurance Society.
  3. STEP3Review by the Health Insurance Society: Any questions about the documents or requests for additional documents will be communicated from the Health Insurance Society via the employer.
  4. STEP4Issue of health insurance card: If certified, the health insurance card for the family member will be sent to the employer.
    * If the family member is not certified, the employer will be notified. The employer will notify the insured person.
  5. STEP5Sending of health insurance card: The employer will send the health insurance card to the insured person.
Required documents:
  • * Check the required documents the Notification of Health Insurance Dependent (Change). (You may be asked to submit additional documents depending on the details of the review.)

  • * Self-employment income is defined as gross receipts minus directly necessary expenses.

    Directly necessary expenses refer to the costs of raw materials and other items needed for production activities (for example, the costs of flour, eggs, and other ingredients in the case of a pastry shop). For more information, see
    (Since the special deduction for blue tax return filers is a special benefit of filing a blue tax return, not an actual expense, it is not considered a directly necessary expense.)
Deadline: Submit within five days from the day of the change.
Applies to: Insured persons whose family has grown due to When your lifestyle changed, childbirth, or other event.
Where to address inquiries and submit documents: Your employer’s staff in charge of social insurance operations
Notes: See the “Description” page regarding dependent certification criteria.
Note that you cannot submit this form to the Health Insurance Society directly.

Documents to attach for dependents who qualify for exceptions to the domestic residency requirement even though they do not have addresses in Japan

Reasons for exception Certifying documentation
(1) Student studying abroad Copy of visa, student ID, certificate of school attendance, certificate of school admission
(2) Family member accompanying an insured person posted abroad Copy of visa, written appointment overseas, certificate of residence issued by a foreign public agency, etc.
(3) Person traveling abroad temporarily for sightseeing, recreation, volunteer activities, or other reasons unrelated to employment Copy of visa, certificate of agency dispatched for volunteer activities, certificate of consent to participate in volunteer activities
(4) Person recognized as equivalent to (2) above due to family relationship to an insured person arising while the insured person is posted abroad Copy of documentation certifying birth, When your lifestyle changed, etc.
(5) In addition to (1)-(4) above, person recognized to have a livelihood based in Japan in consideration of purposes of traveling abroad and other circumstances Subject to determination on a case-by-case basis. Please contact the Health Insurance Society.
  • Note: If documents were prepared in a foreign language, please attach a Japanese translation signed by the translator.

When a family member’s address has changed

When the dependent’s address has changed, please appy to health insurance society. The procedure is below:

参考リンク

Removing a family member

Required documents:
* Please submit the form with the “health insurance card” or valid ”eligibility verification certificate” of the dependent to be removed attached. (Members who enrolled on or after December 2, 2024 and use a Myna health insurance card do not need to return their health insurance card or eligibility verification certificate.)
* If the dependent has an elderly benefits card, please return this as well.
Deadline: Within five days after the reason for adding the family member arises
Applies to: [Insured persons with dependents who meet the following descriptions]
  • No longer eligible as dependents due to reasons such as employment, living apart from the insured person, or death
  • No longer satisfy the conditions for certification as dependents due to increased income
  • No longer rely on the income of the insured person for their livelihood because the insured person no longer provides an allowance
Where to address inquiries and submit documents: Your employer’s staff in charge of social insurance operations
Notes: Note that you cannot submit this form to the Health Insurance Society directly (unless you are a Voluntarily and Continuously Insured Person).

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