
Canis Lupus Familiaris
Tosa
Giant
Japan
SuspiciousAggressiveBoldBraveFearlessSensitive
Japan's premier fighting breed, the Tosa was developed by crossing native Japanese dogs with Western mastiffs, Great Danes, and Bulldogs to create a formidable, sumo-like canine athlete. They are quiet, patient, and surprisingly sensitive dogs that bond deeply with their owners, though their size, strength, and guarding instincts require experienced, responsible ownership.
Physical Traits
Height (Male)24–32”
Height (Female)22–28”
Weight (Male)100–200 lbs
Weight (Female)90–140 lbs
Characteristics
Energy Level
Trainability
Size & Scale