親子代々

おやこだいだい【親子代々】

from generation to generation; 《handed down, passed on》 from father to son [mother to daughter].

●親子代々伝わる家宝 an heirloom that's been in the family for generations.

●親子代々のしきたり a tradition handed down from generation to generation

・親子代々のお得意さん customers who've been coming to the same shop for generations

・彼のところは親子代々の料亭だ. His place is a Japanese restaurant that's been in the same hands for generations.

●わが家は江戸時代から親子代々染物屋をしています. Our family has been running a cloth-dyeing shop for generations going back to the Edo period.