Erikae

the turning of the collar (襟替え) is the ceremony where an apprentice geisha graduates to become a geisha. The occasion is marked by a number of ceremonies and changes in appearance, such as wearing a plain white collar on the underkimono instead of the embroidered red-and-white attached collar  worn by apprentices. The hairstyle worn by an apprentice also changes: from a variety of different styles constructed with her own hair to the -style wig worn by geisha.