二十代(にじゅうだい)

にじゅうだい
noun
one's twenties; the twenties (age range)
agenumber
1. one's twenties; ages 20-29
The decade of age from 20 to 29 years old. Used to refer to a person's age range or a group of people in that age bracket.
彼(かれ)は二十代(にじゅうだい)だ。
He's in his twenties.
二十代(にじゅうだい)のうちに海外(かいがい)に行(い)きたい。
I want to go abroad while I'm still in my twenties.
二十代(にじゅうだい)前半(ぜんはん)で結婚(けっこん)する人(ひと)は最近(さいきん)少(すく)なくなっている。
Fewer people have been getting married in their early twenties recently.

Formed from 二十(にじゅう) (twenty) + 代(だい) (generation, age bracket). The 代(だい) suffix is used with multiples of ten to indicate an age range.

Common collocations

Common patterns

The same pattern applies to other decades: 三十代(さんじゅうだい) (thirties), 四十代(よんじゅうだい) (forties), 五十代(ごじゅうだい) (fifties), etc. For teens, 十代(じゅうだい) covers ages 10-19.

general
Added 2026.3.30 0:20 · Revised 2026.9.2 13:01
20000/20477_nijuudai