An official family register recording an individual's/family's civil status (births, marriages, deaths, etc.).
結婚すると、姓の変更を戸籍に記載してもらう必要がある。
When you get married, you need to have your name change recorded in the family register.
転居の手続きとは別に、戸籍の移動（転籍）が必要な場合がある。
Separate from moving procedures, it may be necessary to transfer your family register (koseki tenseki).
役所で戸籍謄本を取って、本籍地の情報を確認した。
I obtained an official copy of my family register at the city office to check my registered domicile information.
Historically, a registry or survey of households used to count population or record household information (in modern usage it usually refers to the family register).
昔の戸籍は村ごとの人口調査の基礎資料として使われていた。
Old family registers were used as basic materials for village population surveys.
歴史研究では、古い戸籍を手がかりに地域の家族構成を調べることがある。
In historical research, old household registers are sometimes used to investigate family composition in a region.