The Tosa, also known as the Japanese Mastiff, is a dog breed of Japanese origin that is considered rare. It was originally bred in Tosa, Shikoku, as a fighting dog and the only dog legally allowed in Japanese dog fighting. Ownership is restricted in some countries as a dangerous breed.
The Tosa was developed in Tosa, Shikoku, which is a region known for its rural landscape.
The Tosa is also known as the Japanese Mastiff, indicating its origins in Japan where it was historically used as a fighting dog. It is the only dog legally allowed in Japanese dog fighting, although this practice is now rare. Due to its fighting background, the Tosa is subject to breed-specific legislation in some countries.
The head of a Tosa
Tosa Inu

The head of a Tosa
Tosa Inu puppies 4 months
Trainability
Responsiveness to training: —/5