What a koseki actually is
A koseki is one record for a whole family, kept by the city office of the family’s registered home, called the honseki-chi. It holds births, marriages, divorces and deaths. Only Japanese citizens are listed, so it also works as proof of Japanese nationality.
On newer computer-issued copies, the one-person extract may be titled Kojin Jiko Shomeisho rather than Shohon. It is the same kind of document with a newer name, and we translate the title as it appears.
Getting a copy has become easier
Since 1 March 2024, a computerised koseki can be issued at any city office in Japan, not only the one where the family is registered. The request must come from you, your spouse, your parents, grandparents, children or grandchildren. A brother or sister cannot collect it for you this way, and this nationwide option does not accept postal requests.
A koseki can only be issued in Japan. If you live here, a parent or your spouse in Japan is usually the quickest route.
How recent it needs to be
Many offices, including Japanese consulates, want a koseki issued within the last three to six months. Check your own office’s rule before you ask family to send one, so they only have to do it once.
You rarely need every entry on a large family page translated. Our Japanese to English translation covers the parts about the people in your application, certified together. Our selective translation page explains when that is accepted here.