coming-of-age ceremony
Refers specifically to the Japanese ceremony held annually for people who have turned 20, celebrating their entry into adulthood.
This year's coming-of-age ceremony will be held at the local hall.
Many people wear kimono to the coming-of-age ceremony.
People who turned 20 this year attended the coming-of-age ceremony.
Next year, my older sister will reach her coming-of-age ceremony.
She wore her mother's furisode at her coming-of-age ceremony.