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Tosa Inu

The Tosa Inu (also called the Tosa Ken, Japanese Mastiff, Sumo Dog and Japanese Fighting Dog) is a breed of dog of Japanese origin that is considered rare. It was originally bred in Tosa (present day Kochi) as a fighting dog and still is today.

The Tosa varies considerably in size, with the Japanese-bred dogs tending to be about half the size of those bred outside the country. The Japanese breed generally weighs between 80 and 120 lb (36,3 - 54,4 kg), while the non-Japanese breeders have focused on dogs that weigh from 130 to 200 lb (89.5 to 100 kg) and stand 24.5 to 32 inches (62 to 82 cm) at the withers. The coat is characterized by its short and smooth appearance and is often red, brindle, or fawn. Occasionally it can be a dull black, but this is somewhat rare. Maintenance of the coat is usually minimal.

The Tosa has unmatched loyalty to its master and is very good with children and people it knows. They are an intelligent breed that know when there is a threat; are known to attack if there is a threat, and is very protective of other family pets. Generally cannot live with another dog unless they have grown up together or related. The breed favors its "den" (i.e. house, car, and property in a home situation) and "pack" (i.e. human family in a home situation) and is very affectionate to its family. It is poised, but when the occasion demands, eager and alert; both fit and willing to serve in its capacity as a companion, watchdog, guide dog for people who are blind, herding dog, fighter, or guardian, whichever the circumstances may demand.

Proper socialization as a puppy is one of the two key factors which determines what a dog's temperament will be as an adult. Genetics is the other. They go hand-in-hand; there is no guarantee that a dog with poor genetics can be trained to be stable and friendly, and by the same token the best genetics are meaningless if the dog is not well-socialized as a puppy. Ideally, a Tosa should be alert and fearless in defense of its den and pack, but loving and non-aggressive within the home environment and to strangers that its master is at ease with. The Tosa is unmatched in strength and pain tolerance but is as clever as it is strong.

Some of the content on this page was originally published on Wikipedia
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