Tosa Inu breed information, pictures and more...

Japanese Tosa, Japanese Mastiff, Tosa Ken

Japan, in the late 1800's

FCI Group II.: Pinscher and Schnauzer- Molossoid Breeds - Swiss Mountain and Cattle Dogs
Dogs 23-25 inches (58-64 cm)
Bitches 21-24 inches (53-61 cm)
Dogs 120-170 pounds (54-77 kg)
Bitches 90-140 pounds (41-64 kg)
10-12 years
5 to 10

The Tosa Inu is a large, short-coated dog with a stately manner and a robust, powerful, and agile body. Its body is slightly longer than tall. The head is large and broad with a boxy muzzle, pendulous flews, and clearly observable dewlap. It is athletic and surprisingly agile. The jaws are very powerful. Overall appearance should be that of a massive but dynamic and flexible athlete, a true canine samurai. The Tosa Inu is a tranquil, quiet, and obedient dog with a calm but vigilant demeanor.


Solid red, though black, yellow, black & tan, fawn, brindle and multi-colored is also permissible.


Short-haired, dense, harsh coat. It is easy to groom. An occasional brushing to remove dead and loose hair is all that is needed to keep the coat looking good. Unlike many other mastiff-type dogs, the Tosa Inu does not drool. This breed is a light shedder.

Health Issues:

It is prone to bloat. Ask about bloat in the lines. Bloat can be a major problem in these large dogs. To minimize the risk of your Tosa developing any hereditary health issues, you should buy a dog from a reputable Tosa Inu breeder.

Buying a Tosa Inu:
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