Fetching details from the dictionary...
ancient boys' hairstyle with a part down the middle and a loop above each ear
Meiji-period women's hairstyle with hair twisted into a knot on top of the head and held in place with a pin
type of dance in kabuki
knots in colour of four cardinal points hanging from the roof above the ring
constricted tagelus (Sinonovacula constricta); Chinese razor clam