三十代(さんじゅうだい)

さんじゅうだい
noun
one's thirties
person
1. one's thirties
The age range from 30 to 39 years old. Used to describe a person's approximate age.
彼(かれ)は三十代(さんじゅうだい)前半(ぜんはん)だ。
He is in his early thirties.
三十代(さんじゅうだい)のうちに転職(てんしょく)したい。
I want to change jobs while I'm still in my thirties.
三十代(さんじゅうだい)の女性(じょせい)をターゲットにした雑誌(ざっし)が人気(にんき)を集(あつ)めている。
Magazines targeting women in their thirties are gaining popularity.

Forms

三十(さんじゅう) (thirty) + 代(だい) (generation, era). Follows the standard pattern for age decades: 二十代(にじゅうだい), 三十代(さんじゅうだい), 四十代(よんじゅうだい), etc.

Usage

Commonly used in marketing, demographics, and casual conversation about age. Japanese culture often discusses age ranges by decade, so this pattern appears frequently.

Common collocations

  • 三十代(さんじゅうだい)の男性(だんせい)/女性(じょせい): man/woman in their thirties
  • 三十代(さんじゅうだい)向(む)け: aimed at people in their thirties
  • 三十代(さんじゅうだい)のうちに: while still in one's thirties
general
Added 2026.3.14 10:36 · Revised 2026.10.7 15:24
16500/16596_sanjuudai