Registering a Child's Birth With Japan From Australia

To register an Australian-born child with Japan, a parent files a birth notification (shussei todoke) with a Japanese consulate within three months of the birth, counting the birthday. If the child also has another nationality, missing that deadline means losing Japanese nationality. You lodge the forms, the registry birth certificate, your own Japanese translation and passports. No notary is needed.

Key takeaways

• The Consulate-General of Japan in Sydney says the birth notification must be filed within three months, including the day of birth. Late notifications are not accepted.
• A child born abroad who also acquires another nationality at birth loses Japanese nationality unless the notification, reserving Japanese nationality, is filed in time.
• You lodge two notification forms, the A4 standard registry birth certificate, your own Japanese translation, the koseki, and passports.
• If the parents married in Australia and never filed a marriage notification, it must go in before or with the birth notification.
• A child with dual nationality must choose a nationality by age 20. No notary or apostille is involved in the birth notification.

The three-month deadline is absolute

The Sydney consulate's birth notification page, updated in May 2026, says that when a child is born, a birth notification must be filed to enter the child in the parent's family register, the koseki, and that it must be filed within three months of the birth. For a child born overseas, the three months include the day of birth, and a notification filed after the deadline is not accepted. The consulate's own example: for a child born on 5 May, the deadline is 4 August.

The reason the deadline matters so much is nationality reservation, kokuseki ryūho. A child born abroad who also acquires a foreign nationality at birth must have Japanese nationality reserved on the birth notification within those three months, or the child loses Japanese nationality from birth. A child born in Australia with an Australian parent, or a parent who holds permanent residence, will usually be an Australian citizen from birth, so for most families the reservation box on the form is essential.

If the Australian certificate is slow

The Australian birth certificate has to come from your state or territory registry first, and that takes time. The consulate says that if two months have passed since the birth and the certificate still has not arrived, you should contact the consulate. It also says that if your deadline is close, you should lodge in person at the consulate rather than by post. Register the birth with the registry and order the A4 standard certificate in the first days after the birth. A commemorative certificate is not the standard certificate the consulate asks for, so check which product you are ordering, and prepare the notification forms and translation while you wait so you can lodge the day the certificate arrives.

Three ways to file

The consulate lists three ways to file the notification:

1. In person at the consulate's counter, with an online booking.
2. By post to the consulate's consular section. Before posting, you email scans of the completed forms and documents so the consulate can check them first.
3. By post to the municipal office in Japan where your koseki is held. Ask that office directly what it needs.

The consulate says it is not responsible for documents lost or damaged in the post, so use a tracked service and keep copies of everything you send.

What to lodge at the consulate

Document	What the consulate asks for
Birth notification form	Two copies; everything except the signature and seal can be photocopied or typed; the second page's birth certificate section is left blank
Birth certificate	One original A4 standard certificate issued by the registry office
Japanese translation	One, on the consulate's template, translated by the person filing
Koseki	A copy of the family register, shown only; an older issue or a copy is fine if nothing has changed
Passports	Both parents' valid passports, originals shown
Australian visa	Proof of both parents' valid Australian visas, a VEVO record; not needed for an Australian citizen

The consulate publishes filled-in samples for different family situations, such as both parents Japanese with or without Australian permanent residence, one parent Japanese and one foreign, and unmarried parents. Use the sample that fits yours. If you want the original birth certificate back, include a letter giving your reason for asking.

Filling in the form

A few practical points from the consulate's page and its links save a returned form:

• The child's name: the consulate links the Ministry of Justice's guidance on the kanji that can be used in a child's name. Choose characters from that list.
• The hospital's address: the consulate publishes a list of hospital addresses to copy onto the form.
• Births outside New South Wales: the page links a separate version of the form for a child born in another state.
• Typing is allowed: everything except the signature and seal can be typed or photocopied, which helps with the second copy.

The consulate also points new parents to the mother and child health handbook, which is now offered as a PDF download from Japan's Ministry of Foreign Affairs rather than handed out at missions.

Travelling with your child

Among the related links on the birth notification page, the consulate includes information on the Hague Convention on international child abduction and a Ministry of Foreign Affairs warning that a parent taking a child overseas can amount to abduction. Both Japan and Australia are parties to that Convention. If the parents separate, taking the child to Japan, or out of Japan, without the other parent's agreement or a court order can lead to a return application. That is a family law question for a lawyer, not a consular one, but it is worth knowing before the first trip.

Marriage first, and unmarried parents

The consulate flags two situations. If you married in Australia under Australian law but have not filed a marriage notification with Japan, you must file it before or together with the birth notification; the consulate cannot accept the birth notification alone ahead of the marriage. If the parents are not married, the child of a Japanese mother is entered in the mother's koseki, and if the father acknowledges the child, an acknowledgement notification is also needed. The consulate's samples note that some cases cannot be filed unless an acknowledgement before birth was completed first.

Do you need a notary, an apostille or a NAATI translation?

No to all three. The consulate works from the original registry certificate, and it asks the person filing to translate it into Japanese on its template, so there is no professional translation. Nothing on the list is notarised or apostilled.

Japan is a member of the Hague Apostille Convention, so if an Australian document goes to an authority in Japan by another route, a DFAT apostille is what it usually needs. In Australia, only DFAT issues apostilles; check the HCCH status table on the day. Our guide to apostilles for Japan covers that route.

Dual nationality, and the choice by 20

A child who keeps Japanese nationality through a timely notification and is also Australian becomes a dual national. The Sydney consulate's nationality page says a dual national must choose one nationality before turning 20, or within two years if they became a dual national after turning 18, and that a person who does not choose may lose Japanese nationality. It gives, as an example of dual nationality, a child who acquires a foreign nationality at birth because one parent is Australian or holds permanent residence. The age was lowered with effect from 1 April 2022.

The same page warns of a separate rule: a Japanese national who acquires a foreign nationality by their own choice, for example by naturalising, loses Japanese nationality at that point, even as a minor. A loss of nationality notification is then due within three months. That rule does not apply to a child who is Australian from birth, but it matters if the family later applies for Australian citizenship for a child who was not.

If the deadline was missed

The consulate explains the route back. A child who lost Japanese nationality because it was not reserved can reacquire it by notification under article 17(1) of the Nationality Act, but only while under 18 and once living in Japan, by filing with the Legal Affairs Bureau covering their address there. It refers families to the Legal Affairs Bureaus in Japan for details. That is a much harder path than filing on time.

In short

File the Japanese birth notification within three months, counting the birthday, and reserve Japanese nationality on it if your child also has another nationality. Lodge two forms, the original A4 registry certificate, your own Japanese translation, the koseki and passports, plus VEVO records if you hold visas. File a marriage notification first if needed. No notary, apostille or NAATI translation is involved, and a dual national child must choose by 20. For other countries, see our guide to registering a birth overseas; our guide to Japanese visa documents covers documents that do need a notary.

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