A man becoming part of his wife's family (moving into and being adopted into the wife's household); a traditional form of marriage arrangement.
彼は結婚して妻の実家に婿入りし、家業を継いだ。
He married into his wife's family, moved in, and took over the family business.
地方では今でも婿入りする家庭がある。
There are still households in rural areas where men marry into the wife's family.
古い記録には婿入りや婿養子の慣例が詳しく書かれている。
Old records describe in detail the customs of marrying into a wife's family and adopting a son-in-law.