middle-aged couple
Refers to a married couple in their middle years, typically implying a mature, settled relationship. The term 熟年 (mature age) carries a nuance of seasoned experience rather than just chronological age.
That middle-aged couple takes a walk together every morning.
熟年夫婦 refers to a middle-aged or mature couple, while 老夫婦 implies a couple who are actually old.
Compound of 熟年 (じゅくねん, 'mature age') and 夫婦 (ふうふ, 'married couple'). The term 熟年 was coined in the late 20th century as a euphemism for middle age, emphasizing ripeness and experience.