Bullmastiff
VS
Tosa
Bullmastiff vs Tosa
Compare Bullmastiff and Tosa side by side and get a clear picture of what sets the breeds apart. Explore differences in size, weight, temperament, activity level, and other key traits to more easily decide which breed best fits your lifestyle and circumstances.
Characteristic
Bullmastiff
Tosa
Breed type
Purebred
Purebred
Height
61 – 69 cm
70 – 75 cm
Weight
41 – 59 kg
60 – 90 kg
Life expectancy
8 – 10 years
10 – 12 years
Child friendly
5/5
3/5
Energy level
3/5
3/5
Intelligence
3/5
3/5
Trainability
2/5
4/5
Health
3/5
3/5
Grooming needs
2/5
1/5
Shedding
3/5
2/5
Barking level
3/5
3/5
Aggressiveness
4/5
3/5
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Characteristics
Bullmastiff
Great with kids
Low grooming
Protective
Stubborn
Giant
Tosa
Low grooming
Easy to train
Giant
Summary
About Bullmastiff
Large, powerful guardian originally bred to catch poachers, the Bullmastiff is calm, confident and deeply loyal, often bonding closely with one person. It has a short, low‑maintenance coat, needs space, consistent early training and socialisation to guide its natural protectiveness.
About Tosa
The Tosa is a large, powerful Japanese breed, calm and dignified at home yet naturally protective. Loyal and often devoted to one person, it needs experienced handling, early socialisation and consistent training. Short-coated but high-commitment, it faces legal restrictions in some countries.
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