noun
three generations; three periods
Refers to three successive generations of a family, or three historical periods/eras. Often used in contexts like family businesses, dynasties, or historical timelines.
この店は三代続く老舗です。
This shop is a long-established business that has lasted three generations.
三代にわたる研究の成果が発表された。
The results of research spanning three generations were announced.
noun
third generation
Specifically the third generation in a sequence, such as a third-generation owner, immigrant, or product version.
彼は三代目の社長です。
He is the third-generation company president.