The Tosa (土佐, also called the Tosa Inu, Tosa-Ken or Japanese Mastiff) is a breed of dog of Japanese origin that is considered rare. It was originally bred in Tosa, Shikoku (present day Kōchi) as a fighting dog and is the only breed still used (legally) in Japanese dog fighting. Ownership is restricted in some countries as a dangerous breed.
Also known as
This breed is also called Japanese Fighting Dog, Japanese Mastiff, Japanese Tosa, Tosa Dog, Tosa Fighting Dog, Tosa Inu, Tosa Ken, Tosa Ken (土佐犬), Tosa Token, Tosa Tōken as well as Tosa Tōken (土佐闘犬).
Is your dog a Tosa?
You can use our Dog Scanner app to find out whether your dog is a Tosa.