Marriage registration in Japan for foreign residents
In Japan, what makes a marriage legal isn’t the wedding — it’s a piece of paper filed at city hall. For couples where one partner is a foreign national, there’s one extra document and a lot of country-by-country variation. Here’s the framework, from the Ministry of Justice (MOJ) and official municipal guidance.
What makes a marriage legal
Per MOJ, a valid marriage is established when the marriage notification is submitted to the family-register (koseki) counter, the couple is found to meet the requirements for marriage, and the notification is accepted. No religious or ceremonial event is legally required — the paperwork is the marriage.
The foreign spouse’s documents
The key document is the Certificate of Legal Capacity to Contract Marriage (婚姻要件具備証明書):
- Generally required from a foreign national, together with a Japanese translation (MOJ). Any foreign-language document must have a full Japanese translation with the translator’s name noted.
- Yokohama City’s guidance adds you’ll also need proof of nationality / passport, and depending on nationality, extra documents such as a birth certificate or a sworn statement (申述書).
It varies by country — ask two offices
Because the proof of “capacity to marry” differs by country, official municipal guidance directs you to contact your own country’s embassy or consulate in Japan for your required documents. And because requirements can differ by where you file, also confirm with the municipal office that will register the marriage. Checking both, in advance, saves a wasted trip.
Marriage ≠ visa: the spouse status is separate
Registering the marriage does not automatically change your residence status. To hold the “Spouse or Child of Japanese National” (or Spouse of Permanent Resident) status, you apply separately to the Immigration Services Agency for a change of status — see our status & changing status guide for how immigration procedures work. (Note too that spouse-status holders must later notify immigration within 14 days of events like divorce or a spouse’s death.)
Reporting to your home country
A marriage registered in Japan often also needs to be reported to the foreign spouse’s home country for it to be recognised there — but this is entirely country-specific (usually via that country’s embassy/consulate), so confirm the process directly with them.
Frequently asked questions
Is a wedding ceremony legally required to marry in Japan?
No. In Japan a marriage is legally created only when a marriage notification (婚姻届, kon’in todoke) is submitted to and accepted by a municipal office. A ceremony has no legal effect on its own (Ministry of Justice).
What is the Certificate of Legal Capacity to Contract Marriage?
A document (婚姻要件具備証明書) confirming you meet your home country’s legal requirements to marry. A foreign national marrying in Japan generally obtains it from their own embassy/consulate and submits it with the notification, usually with a Japanese translation.
Are the required documents the same for every nationality?
No. Official municipal guidance (Yokohama City) states the required documents vary by country — some may also need a birth certificate or a sworn statement. Confirm specifics with both your embassy/consulate and the municipal office where you’ll file.
Does registering my marriage update my visa automatically?
No. The marriage registration (koseki) and any residence-status change are separate. To hold a spouse-based status of residence, you apply separately to the Immigration Services Agency — it is not automatic.
This is general information from MOJ and municipal official sources (2026-07-13); requirements vary by nationality and municipality and can change. Confirm your own documents with your embassy/consulate and the municipal office, and treat the visa change as a separate immigration matter.
Sources
- Ministry of Justice (MOJ) — Koseki: international marriage (official) (retrieved 2026-07-13)
- Yokohama City — Marriage notification with a foreign national (official) (retrieved 2026-07-13)
- Immigration Services Agency — Spouse or Child of Japanese National (retrieved 2026-07-13)
- Immigration Services Agency — Notification regarding spouse (retrieved 2026-07-13)