父(ちち) chichiは wa５０ 50代(だい) daiです desu。 My father is in his fifties. Literal Father [topic-は] 50s [copula-です]. ~代 (だい) after a number means 'the decade of' — 50代 = 'fifties.' A clean way to give an approximate age. Works for any decade: 20代, 30代, etc. agefamily
父(ちち) chichiは wa５０ 50代(だい) daiです desu。 My father is in his fifties. Literal Father [topic-は] 50s [copula-です]. ~代 (だい) after a number means 'the decade of' — 50代 = 'fifties.' A clean way to give an approximate age. Works for any decade: 20代, 30代, etc. agefamily