from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the simple topknot worn by rikishi of the lower ranks, and by the higher ranks on informal occasions
Geisha Asobi points us to this image collection (and online store) of wacky hats for dogs, called chonmage.
Furthermore they are expected to wear the chonmage and traditional Japanese dress when in public.
On entering sumo, they are expected to grow their hair long to form a topknot, or chonmage, similar to the samurai hairstyles of the Edo Period.
Mottoi (元結): A paper string traditionally used to fasten the topknot of a chonmage hairstyle.