超ちょう高こう齢れい化か

noun

extreme population aging

Refers to a society where the proportion of elderly people is exceptionally high, often used in demographic or policy contexts.

• 日本にほんは超ちょう高こう齢れい化か社しゃ会かいに突とつ入にゅうしている。

  Japan is entering a super-aged society.