The Kai Ken (also called the Tora Inu or Tiger Dog) is a breed of dog that hails from Japan where it is a national monument and has been bred for centuries. It is a rare dog even in its native land and is one of the six native Japanese dog breeds protected by the Nihon Ken Hozonkai.
The Kai Ken is a medium-sized dog with a wedge shaped head and prick ears. Males are typically 18 to 22 inches at the shoulder, while the females are slightly smaller, 17
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. Source: Wikipedia
The Kai Ken has been recorded in the Foundation Stock Service since 1997.