26. Tosa Inu

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The Tosa Inu, or Japanese Mastiff, is a Japanese fighting dog that can weigh up to 200 pounds and pull much heavier loads. Their powerful bodies and jaws can pull up to 3,000 pounds. With proper training, they can be gentle and calm, but their mere presence is intimidating. The breed is banned in some countries due to its fighting history, but not all dogs are automatically dangerous.