noun
middle-old person (75–84 years old)
A term used in Japanese healthcare and welfare systems to refer to people aged 75 to 84, distinct from 前期高齢者 (65–74) and 超高齢者 (85+).
後期高齢者医療制度は75歳以上の人が対象です。
The medical care system for the latter-stage elderly covers people aged 75 and over.
祖
My grandmother is classified as a middle-old person.