(けん)

けん
noun, suffix
zone; sphere; area
1. zone; sphere; area; region
A defined area or sphere of influence, activity, or characteristics. Most commonly used as a suffix attached to another word to indicate a zone or region defined by that word.
首都(しゅと)(けん)人口(じんこう)(おお)い。
The capital region has a large population.
英語(えいご)(けん)(くに)留学(りゅうがく)したい。
I want to study abroad in an English-speaking country.
台風(たいふう)暴風(ぼうふう)(けん)(はい)(まえ)避難(ひなん)してください。
Please evacuate before entering the typhoon's storm zone.

(けん) is most commonly used as a suffix meaning '-sphere,' '-zone,' or '-speaking area.' It defines a region characterized by a particular quality, language, or phenomenon. It is a productive suffix that combines with many different words.

COMMON COMPOUNDS:

  • 首都(しゅと)(けん) (capital region, greater metropolitan area)
  • 英語(えいご)(けん) (English-speaking world)
  • 通勤(つうきん)(けん) (commuting zone)
  • 暴風(ぼうふう)(けん) (storm zone)
  • 成層(せいそう)(けん) (stratosphere)
  • 大気(たいき)(けん) (atmosphere)
  • 勢力(せいりょく)(けん) (sphere of influence)
  • 生活(せいかつ)(けん) (living area, daily activity zone)

USAGE:
(けん) is primarily used as a suffix and rarely stands alone. It attaches to nouns to create compound words describing zones, regions, or spheres. The reading けん is used in most compounds; the alternative reading かん appears in a few words like 語圏(ごけん).