Kubiwa Sumi

Collar Sumi. Kubiwa means 'collar' or 'necklace'. Sumi that goes around the neck connecting one gill area to the other. The term described the shape of certain Sumi that occurs in the Utsurimono family (including Showa Sanshoku and all Utsuri). The name originated because this Sumi resembled the collar of a dog.

(Courtesy of the excellent Book Kokugyo Vol II)