Goat
Saikoho (chest hair): one of the the highest levels of hair that many Kumano fude companies use in their most expensive lines such as the Hakuhodo vermillion and kokutan series, and some of the J series, Chikuhodo Takumi, and Koyudo Fuwa Fuwa. The hair is extremely soft and smooth, so even those with sensitive skin can use this type of hair.
Note: Saibikoho (chest hair) is the highest grade of undyed goat hair, however, it is even rarer than saikoho and costs a lot more. It is comparable to squirrel hair in the softness and fragileness.