A foster or adoptive father — a man regarded legally or socially as a child's father though not the biological parent.
彼は幼い頃に両親を亡くし、養父に育てられた。
He lost his parents when he was young and was raised by a foster father.
養父と実父では、感情のつながりが異なる場合もある。
The emotional bond with a foster father can differ from that with a biological father.
正式に養父になるには家庭裁判所の手続きが必要だ。
To become an adoptive father officially, procedures at the family court are required.