legal name on the family register; official registered name
Refers to the name as recorded in the 戸籍 (family register), which may differ from a commonly used name or alias. Often used in legal or administrative contexts.
See also: 戸籍
You must enter your legal name as it appears on the family register in your passport.
He uses a common name, but his official registered name is different.
Compound of 戸籍 (family register) and 名 (name).