When Certified Translation Is Required in Japan
Certified translation in Japan means a Japanese translation backed by a signed statement of accuracy, usually from a translation agency.1 The catch is that each recipient sets its own bar, so the same birth certificate may need a professional certificate for one office and a home-made translation for another.2
Procedures, fees, and requirements can change. Confirm current details at the Immigration Services Agency site and with the specific office receiving your documents.
Overview
Japan has no single national licensed-translator system for immigration filings. The Immigration Services Agency (ISA) asks for a Japanese translation attached to foreign-language documents, while specialist recipients such as the Japan Automobile Federation (JAF) insist on their own translation.13 Your first job is therefore to identify the recipient, then match the translation to its rule.
The decision branches on who receives the paper. The diagram below maps the common cases.
Visa and immigration filings
ISA's standing rule is simple: attach a Japanese translation, called a 訳文 (yakubun, "translated text"), to every foreign-language document.14 Anyone may prepare it, including you or your spouse, as long as the translation is accurate and carries the translator's signature.1
ISA guidance for marriage procedures adds one detail: record the translator's name on the translation, and notes that the applicant may serve as translator.4 Student-status filings add a freshness rule: Japan-issued certificates you submit must have been issued within the past three months.4
For standard ISA packets (diplomas, employment letters, civil records), a careful self-translation with a signed affidavit usually satisfies the officer. Reserve agency budgets for the recipients below that demand more.
Driver's license conversion
Foreign license conversion, or 外免切替 (gaimen kirikae, "conversion of a foreign driver's license"), is the strictest common case.5 JAF prepares the Japanese translation at its branches nationwide, and driver license centers accept translations from JAF or from certain foreign embassies and consulates in Japan.5
Self-translation is not accepted here. Budget ¥6,600 including tax for the conversion-purpose translation (as of 2026-07-01), or ¥6,000 tax-exempt if you only need the attach-and-drive translation for a listed country license.3 Average issuance runs 2–3 business days for listed countries and 5–10 business days for others (as of 2026-07-01).3
Universities, courts, and other recipients
University admissions sit in the middle. Many programs accept documents in English or Japanese and do not require notarization of the translation, but each school's application guide is the controlling document.2 Read it before ordering anything.
Courts and some embassies sit at the strict end. Family courts and regular courts commonly expect a recognized translator rather than the applicant's own work, and some embassies designate the translators they accept.2 Practitioner sources describe this as a recipient-by-recipient split: some agencies accept self-translation while others require notarization or a designated translator.2
A translation that satisfies ISA can fail at a court counter or an embassy window. A short email or phone call to the recipient naming your document and its purpose prevents paying twice.
Confirm before you pay
The resident strategy that survives contact with reality has three steps. First, name the recipient and its rule. Second, translate only to that bar; do not buy a notarized agency package for an ISA filing that accepts your own work.12 Third, keep the original, the translation, and any affidavit clipped as one set so counter staff can compare them side by side.
| Recipient | Accepted translation | Typical cost signal |
|---|---|---|
| ISA (visa, status, COE) | Self-translation with signed statement | Your time only |
| JAF (license conversion) | JAF or designated embassy translation | ¥6,600 (as of 2026-07-01)3 |
| Universities | Per school guide, often English accepted | Varies; check guide2 |
| Courts, some embassies | Recognized or designated translator | Agency rates apply2 |
The table's cost signals carry their currency notes above; confirm current figures with each recipient before filing.
Good to know
English originals still need a Japanese translation for ISA
English is not an exemption. ISA's rule covers foreign-language documents generally, so attach the Japanese translation even when the original reads fine to you.1
Translate after the apostille when the recipient asks for it
Some receiving offices want the translation to cover the apostille page too. When that is the rule, get the apostille first and translate second.62
One translation per recipient rule, not one for all
A JAF translation serves the license center only, and a court-grade translation is overkill for ISA. Match each translation to its recipient instead of reusing one package everywhere.32
See also
- Gaimen Kirikae: Converting a Foreign License
- Koseki: Japan's Family Register Explained
- Spouse Visa Application After Marriage Registration