The Time Of Blades and Magic
Genpuku or genbuku was an historical Japanese coming-of-age ceremony.
To mark the entry to adult life of children between the ages of 11 and 17 (typically of about age 12), they were taken to the shrines of their patron kami. There they were presented with their first adult clothes, and their hairstyles are changed to the adult style. They were also given new adult names.