Tezumi

Sumi in the pectoral fins. While Sumi can cover any part of the fins it is considered ideal that Tezumi appear at Motoguru in Kumonryo, Shiro Utsuri and Showa. Some varieties would ideally have Motoaka and the rest (except those of solid colour) would ideally have white pectoral fins without Tezumi.

(Courtesy of the excellent Book Kokugyo Vol II)