personal identification matters; documentation of personal status
Refers to official records or documents that establish a person's identity, family relationships, and personal status, such as those found in a family register (戸籍).
The family register records personal identification matters such as name and date of birth.
戸籍 is the family register itself, while 身分事項 refers to the specific personal status items recorded within it.
身分証明書 is a general identification document, whereas 身分事項 is the abstract concept of personal identification matters or the specific entries in official records.
Compound of 身分 (status, identity) and 事項 (matters, items).