高齢化(こうれいか)

こうれいか
noun
aging population
1. aging population, population aging
The demographic shift toward an older average age in a population.
日本(にほん)は高齢化(こうれいか)社会(しゃかい)だ。
Japan is an aging society.
高齢化(こうれいか)が進(すす)むと医療費(いりょうひ)が増(ふ)える。
As the population ages, medical costs increase.
高齢化(こうれいか)率(りつ)が上昇(じょうしょう)している。
The aging rate is rising.

高齢化(こうれいか) describes the demographic shift toward an older population. The suffix 化(か) indicates a process of change.

COMMON EXPRESSIONS:

  • 高齢化(こうれいか)社会(しゃかい): aging society
  • 超(ちょう)高齢化(こうれいか)社会(しゃかい): super-aged society
  • 少子(しょうし)高齢化(こうれいか): declining birthrate and aging population
  • 高齢化(こうれいか)が進(すす)む: aging progresses
  • 高齢化(こうれいか)率(りつ): aging rate

CONTEXT:
Japan has one of the highest rates of population aging in the world. The paired term 少子化(しょうしか) (declining birthrate) is almost always discussed alongside it. Together, 少子(しょうし)高齢化(こうれいか) is a major social and economic issue frequently appearing in news and policy discussions.

Related Words

Related: 少子化(しょうしか) (declining birthrate)
Related: 介護(かいご) (nursing care)
general
Added 2026.1.16 9:27 · Revised 2026.4.8 21:34
04500/04808_koureika