Morphologically classified as type Molossoide a dog is important, powerful and imposing bulk, which unites in its dignity, strength and elegance with a robust construction. It has the head very large, outstanding ears and a triangular shape, hair short, blunt snout and square and around the gorge has a lot of skin. The tail is pending all'attaccatura and very sturdy, the frame is sturdy and strong, the massive head, and the reddish-colored coat with the hot hair very hard and dense.

 The body shape is very linear with very long neck, near the muzzle, dark truffle, very sharp teeth, chest showed. The eyes are small, very dark, which reveal the kind of dignity and daring. The limbs are straight, well proportionate with wide and muscular thighs, the rear limbs are slightly oblique, but much more developed than in front. The feet are flat and well-spring, the tail stretches to the hock, in times of inactivity is brought low and penzolante but when it moves and if requested, the stretches in a straight line. The hair is resistant to low temperatures even if it is very short, red, sometimes with red spots on a white or vice versa. The testicles should be positioned along the scrotum and well marked. Height: - males at least 60 cm. - femmine almeno 54 cm. Weight: - 37.5 kg less than males and can reach 90 kg .- females at least 30 kg. The wide variety of weight and height of the breed Tosa is due to his preparation for fights between dogs. Are divided by categories: light, medium and maximum weight.

Trunk: height tall, well-defined and well developed. The back: horizontal, straight and compact. The kidney is large and muscular. The sides are wide and powerful, with pronounced croup. The ribs: Well circled. The belly: solid, slightly raised and well retracted. The chest: wide and high, with ribs moderately belt. The lumbar region wide and muscular. The croup slightly curved at the top. The head and muzzle, the top of the skull is large, breasts front formed with a right nasal spine obtuse angle. The muzzle is of medium length. The jaws are strong. The head: large with a large skull, the sudden stop and clear and the muzzle is moderately long and squared. The nasal bridge : straight. The Nose must be large and always black. The teeth must be complete, robust, closed with scissors. Teeth: big and strong, especially the canines. The lips: they have very strong jaws and powerful; The neck : massive, muscular and deep, with Fanon, the skin forms a dewlap. The ears are relatively small, rather thin, and the lower parts are based on the cheeks, pointed, attached high on the sides of the skull, falling against the cheeks. The eyes They are fairly small and light reddish brown, usually in the shape of almonds. The term is dignified, austere and self-consciousness. The arts: the front straight and not very tall, but strong. I metacarpus are slightly tilted, but solid and robust. The feet are closed and robust, with fingertips, and big bands, the nails are hard and strong. The forearms are straight, broad and moderately strong. I post are equipped with highly developed muscles. Joints: grassello and the of the hock moderately angled and solid. lumbar region: wide and muscular, the croup slightly curved at the top. posteriori Joints: with muscles well-marked and developed the knees and shin / shank are moderately angulated, but must always be strong. posteriori Feet: correspond roughly to the front, their fingers very tight, pads thick and elastic, hard and nails preferably dark. The shoulder oblique, moderately inclined. The pace, the pace is energetic, powerful and broad expresses temperament and strength. Muscles: well marked, especially in the rear. The basic structure: robust and vigorous. The tail: very strong at the root, is thin to the point, is pending and must scale up to the hock. Lapelle: elastic and quite detached from the body . The coat is short, hard, dense, tight, strong and covers the body in very large. The sexual characteristics: the male shall have the testicles of normal appearance fully descended into the scrotum, healthy and clear. The colors used in the favorite color is red and hot cargo, are allowing white spots on a red, or red spots on a white or a shade made of red. Other colors: red, fawn, apricot, black, dark red stripes. macchie Small : white on chest and feet are allowed. The most common faults: prognathism, enognatismo, cryptorchidism, Monorchidism, very unfair system of teeth, absence of several teeth, small muzzle, weak bone structure, arrangement of teeth slightly incorrect, colors are not allowed by standard, non-standard measures, gait incorrect, defective rear, short forearm, a shy, aggressive, long muzzle, ears brought evil, twisted tail, short tail, truffle clear, eyes clear. FAULTS disqualification: 1) Subjects fearful 2) extreme prognathism exceeds that below. Health: Do not have any health problem, because a dog is very robust. Is inclined to fat: Ask if the lineage from which follows your Tosa had components that tended to fat as this is a problem that should not be underestimated for a dog so mighty and great. Every week should be strigliato to maintain the coat shiny. Longevity: 10 - 12 years of age.