noun
age-gap marriage; May-December marriage
Colloquial term for a marriage where the partners have a large age difference. Often used in media and everyday conversation.
See also: 年の差 (としのさ)
最近、年の差婚が増えているらしい。
It seems age-gap marriages have been increasing lately.
彼女は20歳年上の男性と年の差婚をした。
She had a May-December marriage with a man 20 years older.