銅どう婚こん式しき

noun

bronze wedding; 7th wedding anniversary

Refers specifically to the 7th wedding anniversary, following the traditional anniversary naming convention.

• 両りょう親しんは今年ことしで結けっ婚こん7年ねん目め、銅どう婚こん式しきを迎むかえた。

  My parents celebrated their bronze wedding anniversary this year, marking seven years of marriage.