Sakko (先笄) is a Japanese hairstyle. It is worn by maiko today, but was worn in the Edo period by wives to show their dedication to their husbands. Maiko wear it during a ceremony called Erikae, which marks their graduation from maiko to geiko. Maiko use black wax to stain their teeth as well as this. Crane and tortoiseshell ornaments are added as kanzashi. They style is twisted in many knots, and is quite striking and elaborate.
References
Sakko Wikipedia(Text) CC BY-SA