The Kuda is more aggressive. Some Kudas are known as the "Beast from the East" in the West. The Kuda is a working dog with tall stature, well-developed muscles, strong bones, less fat, loose skin and many wrinkles, and good personality. Confident and calm, with very sharp eyes, lazy and inactive, not easily disturbed. It has a fierce personality and most of them have Bull Terrier blood.

The Shizuo dog has a thick body, well-developed muscles, full of energy, a strong frame, and a strong and powerful physique. . The Tosa Inu is loyal to its owner and is a symbol of tenacity in Japan. It inherits the mystery and subtlety of the East and absorbs the physique and appearance of Western dog breeds.