Kolinsky is native to Siberia, Russia; it has useful implications as it is thin, pliable, and resilient. As the hair is thin, it is able to contain watercolor content impressively within the bristles. It is mainly used for Menso-fude (the finest brush) and Senbyo-fude (drawing long thin line). The tail is used for making the brushes while other parts are processed into fur products.

The Chinese weasel is native to northern China. It is characterized by having thicker hair and more resiliency than Kolinsky. Suitable for Japanese-style paints and used mainly for Senbyo-fude (drawing long thin line) and Menso-fude (drawing thin line). The tail is utilized in the same way as Kolinsky.

Seishindo does not use the Japanese weasel due to the weak structure of its hair. Due to Japan's mild weather, the Japanese weasel hair is short and has no stiffness.

The Chinese goat is native to Wuxi, China. Goat hair has the capacity to contain more watercolors in the bristles. We use it for various paintbrushes and wide brushes (Hake) to improve and increase more paint color content within the bristles. Eating goat meat is a prized custom during the Chinese New Year; at this time, the by-product such as the hair is supplied to the market.

It is native to Wuxi, China. Goat tail hair is much stronger with high resiliency than the belly hair. Artisans call the hair "shiny" because it glistens when it gets wet. Japanese style paintbrushes as Sokumyo, Saishiki, Hake, Renpitsu, etc. are made using this hair. Using natural hair makes a huge difference in quality.

The Japanese raccoon dog has smooth and resilient hair. High-quality chest hair (white or mixed color raccoon) is mainly used for Senbyo-fude and Menso-fude, while the black hair of raccoon dog is used for Saishiki-fude. It is rare and expensive to obtain in current times. As these materials are in limited quantity, we have made sure to stock for several decades to come.

Native to Chinese, the raccoon dog's chest hair (white) has a strong resiliency and good quality. It is an obvious choice material for Senbyo-fude and Menso-fude.

Hair from raccoon dog's back is used to give Saishiki-fude resiliency.

We use straight spine hair from a calico cat. The calico cat has a coat consistent with colors white, brown, and black. However, the white hair is suggested to be the most suitable for Japanese brushes. Seishindo uses the white hair to make Menso-fude and Special-Sokumyo. Cat hair becomes very expensive, making new procurement difficult.　The hide is utilized for the body of the shamisen instrument.

Canadian squirrels are used for Japanese paintbrushes. They are soft and contain watercolors well. As the tips are sharp and ends are thick, watercolors come down effortlessly through the bristles. The squirrel hair is wrapped around Kindei brushes or added to Kindei Hake and Hira-fude (flat brush).

Sambar deer, a native deer to Southeast Asia, has very dry hair. The samber's hair is used to make Kara-hake or sambar brushes for blurring and fading effects. As it is now difficult to procure, we use other deer hair as exceptional option for Kara-hake. As deer hair has hollows in it, we place it in the brush heel and fasten well when baking to protect the hair from loosening.