歳さい代だいMeanings1suffixdecade of age; -tiesAttaches to numbers to express a person's approximate age decade, e.g. 30歳代 means 'in one's thirties'.彼かれは40歳さい代だいで会かい社しゃを辞やめた。He quit his job in his forties.50歳さい代だいの女じょ性せいに人にん気きの健けん康こう法ほう。A health regimen popular among women in their fifties.
