The Tosa (also called the Tosa Inu) is a breed of dog of Japanese origin that is considered rare. It was originally bred in Tosa (present day Kōchi) 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 135 pounds (36 and 61 kg), while the non-Japanese breeders have focused on dogs that weigh from 130 to 200 lb (60 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.
Source of information: http://en.wikipedia.org/wiki/Tosa_(dog)
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