Due to the geographic isolation of this province, the Kai Ken is believed to be the purest of all Japanese dog breeds. Traditional Japanese writings identify the dog as a natural hunter, the master of its domei. The Kai Ken is known to take it to the extreme in hunting game, going so far as to be able to swim or even climb trees. The Kai Ken was recognized by the Japanese Kennel Club in 1934 and was first brought to the United States by the military in the 1950s.
It is unknown if any of these original dogs survived, but a young male and several females were brought to the United States in the 1990s, these dogs are the basic strain of the modern American-bred Kai Ken. This dog breed is also known as Kai or Kai Tora-ken. The Kai Ken has yet to be officially recognized by the AKC. Currently the breed is part of the Foundation Stock Service Program, once the number of registered Kai Ken dogs in the US reaches 150 the breed will be fully accepted by the AKC.
Life expectancy: 14 – 16 years
Weight: 14 – 18 kg
Height at the withers: 43 – 56 cm