Japanese Translation Services

Prism Language Solutions translates Japanese documents into English and English into Japanese for use in the United States. Most of the certified work is the koseki, the Japanese family register, because Japan issues no birth certificate in the form an American office expects. Closed registers, academic records and corporate papers follow the same route: a complete English translation with a signed Certificate of Translation Accuracy.

Last reviewed September 11, 2026 by Sarah J, Prism Language Solutions

Japanese filings are few in number and unforgiving in detail. They come from an attorney handling a spouse petition, an expatriate family, an adult child settling a Japanese estate, or an applicant whose university wants a transcript evaluated.

• Certified translations prepared to meet USCIS requirements
• Human linguists only, matched to the subject
• Fixed written quote within 60 minutes in business hours
• One office in New York, linguists in every state

Japanese Koseki Family Register Translation

The koseki records a household at its registered domicile, the honseki, which is a legal address rather than anywhere anyone lives. Births, marriages, divorces, adoptions, deaths and transfers are entered against the people on it. The full certificate is now printed as a zenbu jiko shomeisho; the older term koseki tohon still appears on request forms and means the same thing. The single-person version is the koseki shohon. Both come from the Citizens Affairs Division of a ward or city office.

When the last person on a register dies, marries out or moves the honseki elsewhere, that register closes and becomes a joseki. Closed registers hold the proof of a deceased parent or a pre-war generation, and they are the pages nobody thinks to order. Since 1 March 2024 wide-area issuance lets an eligible person request the full certificate of a live or closed register at a municipal office anywhere in Japan, in person only. Partial extracts and registers that were never computerized still come from the domicile office.

We translate every page sent, margin annotations and seals included, and era dates stay as printed with the Western year beside them, so Showa 45 reads as Showa 45 (1970). Paper-era registers are vertical and handwritten; transcribing them is the slow half of the job.

• Full family register certificates and the birth records drawn from them
• Closed register (joseki) certificates for a deceased parent or an earlier marriage
• Marriage and divorce entries and the acceptance certificate issued for a filed notification
• Death records and inheritance paperwork for a Japanese estate
• Passports, residence cards, police clearance certificates

Certified Japanese Translation for USCIS

Under 8 CFR 103.2(b)(3) a foreign-language document has to be filed with a full English translation, certified by the translator as complete and accurate. No notary and no sworn translator is required, which surprises applicants told otherwise in Japan. The rule does ask for complete, and that is the word Japanese filings trip over: a register rendered down to names and dates, annotations dropped as boilerplate, is not a complete translation of it.

The certificate names the translator, states competence in Japanese and English, and is signed and dated. Acceptance rests with the receiving office. Mechanics are on the certified translation page; the form-by-form document set is on the USCIS translation page.

Japanese Name Romanization in a Certified Translation

A Japanese name written in kanji does not carry its own pronunciation, and until the Family Register Act amendment took effect on 26 May 2025 the register recorded no reading at all. Municipalities are writing the kana reading in now, with holders asked to notify their own by 25 May 2026. Older certified copies carry only the characters, so a translator working from the register alone is choosing a reading rather than reporting one. We take it from the passport.

The spelling has its own trap. Japanese passports use Hepburn with long vowels dropped, giving Ito and Ono, but the Ministry of Foreign Affairs also permits an added h for a long vowel. One family ends up with Itoh on the passport and Ito on a Social Security record, identical kanji behind both. We print what each document prints and flag the difference.

Japanese Diploma and Academic Transcript Translation

Japanese universities hand out two different pieces of paper and applicants usually hold the wrong one. The certificate presented at the ceremony, the sotsugyo shosho or the gakuiki for a degree, is issued once and generally not reissued. What is meant for later use is the sotsugyo shomeisho, which the university reprints on request, sent with the seiseki shomeisho transcript. NIC-Japan says so plainly, and evaluators want the reissuable pair.

Grading is the other half. Transcripts run on letter bands, on a four-point scale or on raw percentages, and many list credits under a general education block that means little to a US registrar. We translate course titles and marks as they stand and add a note on the scale. See diploma translation.

Apostille and Notarized Translation of Japanese Documents

Japan is a party to the Hague Apostille Convention and the Ministry of Foreign Affairs issues the apostille on public documents, a family register certificate included. MOFA generally wants a koseki certificate issued within the last three months, so the old copy in the drawer is not the one to send. A private document, a power of attorney or a company declaration, goes to a Japanese notary, a koshonin, first.

Any apostille attached to your document is translated with everything else. US-side notarization of the translator's certificate is a different thing; see notarized translation and apostille translation. Tell us which the receiving office asked for.

Japanese Legal and Business Translation

Outside immigration the steady source of Japanese work is cross-border litigation: contracts, board minutes, mail pulled in discovery, patent files. Japanese sentences often leave the subject unstated and English forces you to name one, so a translator who supplies the obvious actor has added a fact to the evidence. Seals are the other habit: a registered company seal or a personal inkan does the work a signature does in a US contract, so we read the characters inside the impression.

Where the matter reaches a deposition, register is the risk. A Japanese witness can be indirect as ordinary politeness, and flat English makes a hedged answer sound firm. Court interpreters come from the same network; we are a private agency, not a court-appointed vendor. More on legal translation.

Japanese Translation Cost and Turnaround

Japanese is quoted from the source character count rather than a word count, and it sits above the common European languages because the US translator pool is small. Short certified records follow the per-page guide, from around $24.95 per page as a US market figure. A current computerized register of two or three pages is usually delivered inside 24 hours of a confirmed quote. A handwritten pre-war joseki is not: budget two to four business days. Ranges are on the pricing page.

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