The Country With No Birth Certificate: Translating a Japanese Koseki for a Child’s First British Passport

Billy is a representative name. Details that could identify the family, the child or the municipal office involved have been changed or withheld.

A Japanese koseki translation for a British passport application begins with a problem most parents only discover halfway through the form: Japan does not issue a birth certificate. There is no single sheet with a baby’s name, a date and a registrar’s signature in the way a British, Greek or Nigerian applicant would recognise. Civil status in Japan lives inside a register, and that register has to be read, converted and rendered in full before HM Passport Office can use it as proof of anything.

Billy wrote to us from Japan, on behalf of a family applying for their child’s first British passport. The message was short and entirely reasonable: “Please translate the following documents which are being used to apply for my child’s British passport from Japan.” Three photographs were attached. The order form said five sheets, Japanese to English, certified translation, receiving authority HM Passport Office, notarisation requested, document type “birth certificate”, purpose “Not Sure”.

Two of those entries were not quite accurate, and the one marked “Not Sure” was the most honest thing on the form.

What arrived: three phone photographs and a document that does not exist

The files were IMG_0873, IMG_0874 and IMG_0875 — phone photographs taken on a table, not scans. Nothing wrong with that; most of the Japanese civil documents we handle arrive exactly this way, because the family is standing in the municipal office or has just got home from it. But three images against a declared paper length of five told us immediately that we were missing something, and that the thing we were missing was not a detail.

The form said “birth certificate” because that is the only option that makes sense to a British passport form. What the photographs actually showed was a koseki (戸籍) — the Japanese family register. Not a certificate about a person, but a record of a household over time, held by the municipal office of the family’s honseki, their registered domicile. The honseki is not where the family lives; it is the place the register sits, which may be a town nobody in the family has visited in years.

That distinction decided the whole job. We were not translating a certificate. We were translating a register, and a register has a shape, a sequence and a set of internal rules that the English version has to preserve if it is going to prove parentage to a passport examiner.

The three instruments parents confuse, and why it matters

When a parent in Japan goes to the municipal counter and asks for “my child’s birth certificate”, they can walk out with one of several quite different documents. Picking the wrong one is, in our experience, the single commonest reason a passport file for a Japan-born child comes back for more evidence.

A koseki zenbu jiko shomei (全部事項証明書) is a certified extract of all recorded matters in the register — the head of the register, every person entered in it, each entry and each removal, the marriage notification, the birth notification, and the dates attached to all of them. This is the full picture, and it is normally the instrument that answers a passport question about who a child’s parents are.

A koseki kojin jiko shomei (個人事項証明書) is an extract of part of the register, limited to one named individual. It looks official, it carries the same seal, and it is cheaper and quicker to obtain. It is also, for a parentage question, frequently useless — because the entries it leaves out are the entries that connect the child to the parents.

A shussho todoke kisai jiko shomeisho (出生届記載事項証明書) is something else again: a certificate of the particulars recorded in the birth notification, the form the parents filed at the counter within the statutory window. For a very recent birth, before the entry has worked its way through to the register, this is sometimes the only document that exists.

Three instruments, three different proofs. A translator who simply types “Birth Certificate” at the top of the English version has already misrepresented the document, and has taken a decision that was never theirs to take. Our first message back to Billy was therefore not about price or turnaround. It was a question: how many sheets did the office hand over, and does the last one carry the notation that nothing follows it?

Five sheets, three photographs: why the arithmetic mattered

A koseki extract is issued as a set. The sheets are sequential, the entries run across them, and the final sheet carries the municipal certification — the statement that the copy agrees with the original, with the seal of the mayor or head of the issuing office. Japanese registers also use a margin notation reading ika yohaku (以下余白), “blank below”, to mark where the record genuinely ends.

That notation is a gift to anyone checking completeness. If the last photograph you hold does not show it, and does not show the certification, then you are not holding the end of the document — and a missing sheet changes what the document proves. A set that ends one sheet early can quietly omit a removal, a correction, or the entry establishing a parent’s own position in the register.

So “paper length 5” was a claim about sheets, not about surfaces. Three photographs could not cover five sheets unless some of the sheets were blank, and in a register they are not. We asked Billy to photograph the remaining sheets, flat, in daylight, with the fold of the paper opened out and the whole margin inside the frame — including the stamped portions, which sit close to the edge and are the first thing a hurried photograph clips.

Two further images came back the same day. The set was complete, and the final sheet did carry both the “blank below” notation and the issuing office’s certification. Only then did the translation properly begin.

Imperial era years are a translation task, not a flourish

Every date in a koseki is written in a Japanese imperial era year. A marriage notification might be recorded in Heisei 30, a birth in Reiwa 5, an earlier entry in Showa something. These are not decorative; they are the only dates the document contains, and they are the dates a passport examiner will compare against the rest of the file.

Converting them is arithmetic with a trap at each era boundary. Heisei ran from 1989 to 2019 and Reiwa began in 2019, so the first and last year of each era overlaps with its neighbour and has to be read against the month and day, not just the year number. Our standing practice on Japanese civil documents is to show the converted Gregorian date and retain the original era reading alongside it, so that anyone holding the Japanese and the English side by side can verify the conversion rather than take it on trust. A date that cannot be checked is a date that invites a query.

Names: following the passport, not correcting it

The name fields in a register carry kanji, and often furigana readings above them. Romanising them is where a well-meaning translator can do real damage, because a Japanese surname has more than one defensible spelling in Latin script. The same name may appear as Ito, Itoh or Itou depending on whether strict Hepburn, the long-vowel convention permitted in Japanese passports, or a straight transliteration of the kana was used when the family’s existing travel documents were issued.

None of those spellings is wrong in the abstract. Only one of them is right for this file — the one already printed in the parents’ passports and in any previous British documents for the family. Our rule, stated plainly in the delivery note, is that the translation follows the passport rather than correcting it, and that any divergence between the register’s reading and the passport spelling is flagged for the applicant rather than silently harmonised. Where a reading genuinely admits more than one romanisation, we say so in a translator’s note. That is information the examiner can act on; a silent choice is not.

We checked the romanisation of the child’s name, both parents’ names, the place of the honseki and the issuing municipality against what Billy told us was already in use. One of them differed from the obvious Hepburn reading. We kept the family’s version and noted why.

Reading the register for parentage, not just for a date of birth

It is worth being clear about why the whole register had to be rendered rather than the lines containing the child’s name and date of birth.

A first British passport for a child born outside the UK does not turn on the child’s birth date alone. It turns on the British parent’s own status and on the relationship between the parents and the child — which is precisely what a family register is built to show, through its sequence of entries, notifications and removals. The register is being read for parentage. Reduce it to a date of birth and you have thrown away the part of the document that was doing the work.

That is also why the registrar’s seal, the margin annotations and the entry and removal lines all had to be accounted for in the English version rather than summarised. Where a stamp or a handwritten correction appears, we describe it in square brackets in its proper position, so the English reads as a map of the Japanese page rather than a tidied-up paraphrase of it.

What HM Passport Office generally expects

For a foreign-language document, authorities in this position generally require a complete translation — the whole document, not an extract — accompanied by the translator’s certification. That certification normally carries the translator’s name and contact details, the date, confirmation that it is a complete and accurate translation of the original, and the languages involved. Requirements do change, and they are published; we always tell applicants to confirm the current position directly with HM Passport Office before submitting, particularly when applying from overseas, where the submission route itself may differ.

The order had also asked for notarisation, so we addressed it honestly rather than simply selling it. Notarisation adds a notary public’s attestation to the translator’s declaration. It is a genuine requirement for some foreign authorities, some court and property matters, and some documents destined for legalisation — and where it is needed, our notarised translation services handle it. A UK passport application is not usually one of those cases; a properly certified translation is normally what the file needs. We set out both options, explained which one the stated purpose pointed to, and let Billy decide with the facts in hand rather than quietly adding a service.

What went into the file

1. A complete English translation of all five sheets of the register extract, sheet by sheet, preserving the order and position of every entry.
2. Every date given as a converted Gregorian date with the original imperial era reading retained for verification.
3. Names romanised to match the family’s existing passports, with a translator’s note on the alternative reading.
4. Seals, the issuing office’s certification and all margin annotations — including the “blank below” notation — described in place, so completeness is visible on the face of the English document.
5. A signed certificate of accuracy naming the languages, the date and our contact details, matched to the original images so the pair cannot be separated.

Delivered inside the deadline, with the document correctly identified as a certified extract of a Japanese family register rather than mislabelled as a birth certificate. Nothing was queried. Billy confirmed the translation did its job and the application went in complete and on time.

“I thought I was sending you a birth certificate. You were the first people to tell me Japan doesn’t have one — and to ask for the two sheets I hadn’t photographed.”

Questions we are asked by parents applying from Japan

Can I just translate the page with my child’s name on it?

No — and this is the mistake we see most often. The register is being read for the relationship between parent and child, which is established across the sequence of entries, not on one line. A partial translation of a complete document also fails the “complete translation” expectation. Translate the whole extract.

Which document should I ask the municipal office for?

For a parentage question, the full extract of all recorded matters is usually the right instrument. Ask the counter staff for the complete version rather than an individual extract, and count the sheets before you leave. If the birth is very recent, ask whether the entry has reached the register yet, or whether a certificate of the particulars in the birth notification is what is available.

Are phone photographs good enough?

Usually yes, if they are complete and legible. Lay each sheet flat, open the fold, keep the whole margin and every stamp inside the frame, and shoot in daylight rather than under a ceiling light that throws a shadow across the seal. If you can read the small print on your own screen, we can work from it. If a sheet is cut off or a seal is blurred, we will ask again — that is cheaper than a query later.

Does the English spelling of our name have to match our passports?

It should. A Japanese name can be romanised in more than one legitimate way, and a translation that “corrects” the spelling your passports already use creates an apparent mismatch between documents in the same file. Tell your translator the spelling in use, and expect any genuine ambiguity to be flagged rather than decided for you.

Do I need an apostille on the register extract?

That depends entirely on what the receiving body asks for, and it is a separate question from translation. Confirm it with HM Passport Office for your route before paying for legalisation you may not need.

If you are in the same position

If you are applying from Japan for a child’s first British passport, send us the register extract as it was issued — all of the sheets, photographed flat — and tell us the name spellings already in use. We will tell you what the document is, whether anything is missing, and whether certification alone is what your file needs. Our certified birth certificate translation services cover Japanese family register extracts and the related civil instruments, and you can hire a translator directly for Japanese to English work. Pricing for Japanese civil documents is quoted per sheet in GBP excluding VAT once we have seen the images, with standard turnaround of two to three working days; same-day work is available where the images are complete when they reach us.

For a comparable file from a different document family, you may also find our case study on a birth certificate translated for HM Passport Office useful. Requirements can change, so confirm anything case-specific with HM Passport Office before you submit.