noun
official copy of the family register
A certified copy of the family register (koseki) issued by a municipal office, used for legal and administrative procedures such as marriage, inheritance, or passport applications.
パスポートの申請には戸籍謄本が必要です。
An official copy of the family register is required for passport applications.
Compound of 戸籍 (family register) and 謄本 (certified copy). The term is a modern legal coinage reflecting the Japanese family registration system.