| Country of origin: | Japan |
| Registries: | AKC FSS, UKC |
| Occupation: | Hunter |
| Size: | 17 to 22 in tall; 30 to 40 lbs |
| Longevity: | 12 to 14 years |
| Exercise: | Active |
| Training: | Moderate; socialization is crucial |
| Grooming: | Moderate; sheds |
The Kai Ken (甲斐犬?, also called the Tora Inu or Tiger Dog) is a breed of dog that hails from Japan where it is a natural monument and has been bred for centuries. It is an extremely rare dog even in its native land and is related to the Japanese Spitz dog type.