Family Register & Resident Records

Guide to Japan's koseki system administered by the Ministry of Justice. Explains different register types for genealogy research.

How to request koseki certificates online via MynaPortal. Available to overseas Japanese with a My Number Card.

How to apply for koseki certificates at Japanese municipal offices, including mail-in requests and how to trace ancestors back through historical registers.

How overseas Japanese nationals can obtain koseki certificates through Japanese embassies and consulates.