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Translation Agencies and Sworn Translators in Japan

A certified translator in Japan is not a government license holder but a professional whose translation arrives with a signed certificate of accuracy.12 Knowing that distinction keeps you from hunting for a sworn-translator office that does not exist and points you to the agencies that actually serve foreign residents.

Confirm current details with official sources

Procedures, fees, and requirements can change. Confirm current details with the office receiving your documents, since each recipient sets its own translator rule.

Overview​

Japan has no continental-style sworn-translator appointment for immigration or civil paperwork. Credibility travels with the 翻訳証明書 (hon'yaku shōmeisho, "certificate of translation"): a page naming the translator, dating the work, and carrying a signature and company seal.2 Industry standing adds a second signal through membership in the 日本翻訳連盟 (Nihon Hon'yaku Renmei, "Japan Translation Federation", JTF), the commercial-translation industry body founded in 1981 and authorized as a public-interest corporation in 1990.1

The vendor landscape​

Major general agencies handle certified work alongside business translation. Honyaku Center, one of the country's largest agencies, sits deep in the industry establishment, with its leadership holding the JTF presidency.3 For outbound civil records, koseki specialists dominate: Samurai Translators attaches a certificate of translation to every family-register rendering, listing the translator's name, date, signature, seal, and contact details.2

Vendor typeExampleBest for
Major general agencyHonyaku CenterContracts, corporate papers, mixed packets3
Civil-record specialistSamurai Translators, FRANCHIRKoseki, juminhyo, marriage records24
Budget koseki translatorNanaka Translation OfficeSingle-person koseki on a budget5
General rate benchmarkTokyo business agenciesCalibrating per-word quotes6

The table names only vendors verified against primary sources during research. Two vendor names sometimes seen online could not be verified and are omitted rather than asserted.

Costs and turnaround​

Civil-record pricing runs per document, not per word. Sampled bands (as of 2026-09 unless noted) cluster between ¥2,800 and ¥8,800 per standard document. Samurai Translators charges ¥6,600 standard or ¥8,800 express for a one-page new-format koseki, adding ¥2,200 per extra page (as of 2026-09).2 FRANCHIR lists a koseki tohon or shohon at ¥8,800 tax included, plus ¥3,300 per additional person, with juminhyo at ¥8,800 (as of its 2024-09-30 price page).4 Budget specialist Nanaka lists a single-person new-format koseki at ¥3,300.5

General business translation prices by the word for calibration: English to Japanese runs about ¥16–22 per word by field, with minimum charges (as of 2026-09).6 Turnaround at the koseki specialists runs five business days standard, one to two days express, and same-day super-express at double price (as of 2026-09).2

Get the express quote in writing before you need it

Standard five-day service covers most filings, but court deadlines and flight dates do not wait. Confirm the express multiplier for your exact document before the deadline forces your hand.

The JTF credential signal​

JTF membership groups translation companies, organizations, and individual professionals engaged in commercial translation.1 Treat it as evidence of industry standing, comparable to a trade association badge. It is not a government license, and no recipient is obliged to prefer it; the recipient's own rule still decides.1

Choosing the right path​

Match the spend to the stakes. Routine visa and status filings accept careful self-translation with an affidavit, so agency money adds little.1 University admissions, family-court papers, and outbound civil records are the safer agency cases, since the recipient either prescribes the translator or weighs the certificate.24

Confirm the recipient's translator rule before ordering

Some offices accept only designated translators or in-house translations such as JAF's. An agency certificate from anyone else, however polished, fails that filter.7

Good to know​

Confirm the recipient's translator rule before ordering​

Repeat checks beat assumptions. A five-minute confirmation with the receiving office outranks any agency's promise that its certificate works everywhere.7

Budget per document, not per word, for civil records​

Koseki and juminhyo vendors price by page or by person listed, so a per-word quote signals you are talking to the wrong desk. Ask for the per-document package including the certificate.24

Ask whether the apostille page needs translating too​

Some receiving offices want the translation to cover the apostille certificate as well. Clarify this before the translator closes the file, since reopening costs extra.2

See also​

References​

Footnotes​

  1. Japan Translation Federation (JTF). English pages (founded 1981; public-interest corporation authorized by METI 1990; companies, organizations, individuals). https://www.jtf.jp/english/index ↩ ↩2 ↩3 ↩4 ↩5

  2. Samurai Translators. Koseki translation fees (new-format per-page table; standard 5 business days; express 1–2 days). https://english.translators.jp/family-registers/ ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9

  3. Honyaku Center Inc. Corporate Profile (JTF presidency; chambers memberships). https://www.honyakuctren.com/aboutus/corporateprofile.html ↩ ↩2

  4. FRANCHIR Co. Certified legal translation prices (koseki tohon/shohon ¥8,800 tax incl.; juminhyo ¥8,800). https://franchir-japan.com/english/legal-translation/ ↩ ↩2 ↩3 ↩4

  5. Nanaka Translation Office. Koseki fee table (1 person ¥3,300 new-format). http://nanakahonyaku.com/koseki.html ↩ ↩2

  6. Jupiter Translation (Tokyo). Rate table (EN→JA ¥16–22/word by field; minimum charges). https://honyaku-jupiter.com/ (rate table page) ↩ ↩2

  7. Japan Automobile Federation (JAF). Translation issuance fees (¥6,600 kirikae / ¥6,000 attach-and-drive). https://english.jaf.or.jp/driving-in-japan/drive-in-japan/about-dltas ↩ ↩2