noun, noun which may take the genitive case particle 'no'
foreign citizenship; foreign nationality
Refers to the legal status of being a citizen or national of a country other than Japan. Often used in contexts of dual citizenship, naturalization, or legal rights.
彼は外国籍を取得した。
He acquired foreign citizenship.
外国籍の人は、この手続きが必要です。
People with foreign nationality need to follow this procedure.
二重国籍 means 'dual citizenship', which is a related concept often discussed alongside 外国籍.
Compound of 外国 (foreign country) + 籍 (register, membership). The term straightforwardly denotes registration or membership in a foreign country.