also: けちえん
noun
blood relationship; consanguinity
Refers to the abstract tie of shared blood or genetic connection. Often used in legal, anthropological, or formal contexts.
血縁関係にある者同士の結婚は法律で禁止されている。
Marriage between people who are related by blood is prohibited by law.
彼とは血縁はないが、本当の兄弟のように育った。
I have no blood relationship with him, but we grew up like real brothers.
noun
Refers to a person who is related by blood, as opposed to a relative by marriage or adoption. Often used in the plural 血縁者.
彼は私の唯一の血縁です。
He is my only blood relative.
血縁のない親族も大切にしている。
I also cherish relatives who are not related by blood.