ancestral business; inherited family business
Refers to a business or trade passed down through generations within a family. Often used in contexts of succession, legacy, or traditional family enterprises.
He took over the ancestral business and is keeping the long-established Japanese confectionery shop going.
祖業を守りながら、新しい事業にも挑戦している。
While preserving the inherited family business, they are also venturing into new enterprises.