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Shirimono
GRAMMAR
〜代
teens
era
Explanation
NOTE

だい marks an age range (like twenties, thirties) or a generation / era. It turns a number or noun into a broad time bracket.

NOTE

Attach directly after a noun or number. With ages, 二十にじゅうだい means in one's twenties. With other nouns, it can mean the era of ~ or the generation of ~.

STRUCTURE
N
<ruby>代<rt>だい</rt></ruby>
かれ三十さんじゅうだい会社かいしゃつくった。
Kare wa sanjuu dai de kaisha wo tsukutta.
He started a company in his thirties.
二十にじゅうだいのうちにたくさん旅行りょこうしたい。
Nijuu dai no uchi ni takusan ryokou shitai.
I want to travel a lot while I'm in my twenties.
昭和しょうわだい音楽おんがくきです。
Shouwa dai no ongaku ga suki desu.
I like music from the Showa era.

Practice exercises

1
じゅうだいのころは毎日まいにち音楽おんがくいていた。
In my teens, I listened to music every day.
Answer
だい
2
かれ三十さんじゅうだい会社かいしゃげた。
He launched a company in his thirties.
Answer
だい
3
昭和しょうわだい映画えいがいまでも根強ねづよ人気にんきがある。
Movies from the Showa era still have a deep-rooted popularity.
Answer
だい
4
二十にじゅうだいのうちに様々さまざま経験けいけんんでおくべきだ。
You should accumulate various experiences while you are in your twenties.
Answer
だい
5
はは四十よんじゅう日本語にほんごはじめた。
My mother started Japanese in her forties.
Answer
6
じゅうのころは毎日まいにち運動うんどうしていた。
When I was in my teens, I exercised every day.
Answer
7
ちち五十ごじゅうだいです。
My father is in his fifties.
Answer
だい