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Ainu Inu
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Weight: 50 cm (20 in)
Height: 44 pounds (20 kg)
Temperament: The breed is known for fidelity to its owner, bravery, and the ability to withstand the cold, among other traits. It has an innate sense of direction and can therefore return to its master no matter how great the distance. This breed has the unusual capability of fighting against the Hokkaido Brown Bear, or Higuma to protect its master. The way in which the Ainu Dog accomplishes this is to attack the bear's back, then bite and hold the dorsal flesh of the bear's neck until the bear retreats. Despite its long history as a working breed, the Ainu Dog ideally combines the roles of family pet and hunter. This breed should not be allowed to run free around other animals. They are good with children if they are raised with them as pups. This dog is not recommended for apartment life. It is moderately active indoors and will do best with a large yard.

Kai Ken
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Height:

- Male: 45.7–55.9 cm (18-22 in)
- Female: 43.2–50.8 cm (17-20 in)

Weight: 30-40 pounds (13.6–18.1 kg)
Temperament: The Kai Ken is intelligent, agile, alert and brave. They are natural hunters and make good watch dogs, being reserved with strangers but loyal to their families. They are friendly, often good with children and are not usually aggressive towards other dogs. Many love to swim, and have been known to cross rivers and climb trees while chasing their prey.

Kishu Inu
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Weight: 30-60 pounds (13.6–27.2 kg)
Height: 43–55 cm (17-21 ½ in)
Temperament: Kishu Kens are a one person/one family dog. They are courageous and brave as hunters, and will be loyal to their owners. They have a strong prey drive, and will hunt small animals. They do well with other dogs if socialized well as puppies, however, due to their pack instincts they might cause some fights for dominance. They are quite headstrong and willful, making training necessary, but they are devoted and loyal to family, getting along well with children, if raised with them. Kishu Kens like to keep an eye on whatever is going on, and sometimes find a high place to look out from. They can be aloof or shy around strangers. They are easily housebroken, intelligent, and strong willed.

Shikoku Inu
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Weight: 30-55 pounds (13.6–24.9 kg)
Height: 43–53 cm (17-21 in)
Temperament: It is cautious and brave with good judgment. It is also loyal to its master. It has sharper features than most Japanese dogs and is sometimes allowed to chase wild boar so it will maintain its nature.  Shikoku dogs are tough and sufficiently agile to run through a mountainous region. They are the ideal companion for active outdoor people. They are very energetic and active outside but they are calm and quiet indoors. The Shikoku is a very intelligent dog and a quick learner. They are not as stubborn and independent as the other native Japanese breeds, but still it is not a dog for every person