Tosa
Japan, Molossian type
- Size
- Giant
- Height
- 55–65 cm
- Weight
- 36–60 kg
- Life expectancy
- 10–12 yrs
- Calm
- Dignified
- Protective
- Powerful
- Reserved
Heights and weights are typical adult ranges; individual dogs vary.
About the Tosa
The Tosa is a large mastiff-type dog from Japan, developed in Tosa on Shikoku. It is powerful and broad with a heavy head, loose skin about the neck and a short, smooth coat in red, fawn, brindle or black shades. It is a strong breed that needs experienced owners and is restricted or banned in some countries.
Temperament
Calm, quiet and dignified in the home, but powerful and protective. It may be reserved with strangers and can be intolerant of other dogs, so early socialisation and firm, calm training are essential.
Exercise
Needs moderate daily exercise, such as steady walks and training. It must be well controlled on lead due to its strength.
Grooming
The short, smooth coat asks very little: a weekly brush or wipe with a damp cloth is plenty.
Care & wellbeing
Giant-breed care applies: manage weight, avoid hard exercise during growth and ask about joint and bloat awareness. Check local legislation before owning one, as laws on this breed vary. Check skin folds, ears and teeth.
Daily needs at a glance
For a typical 48 kg adult- Water
- 1.9 L–2.9 L
- a day
- Energy
- ≈ 2,040 kcal
- a day, neutered adult
- Exercise
- 30–60 min
- a day
- Grooming
- An occasional brush is plenty
Starting points from the same formulas as our calculators. Your pet's age, weight, activity and food all change the numbers. Work it out for your pet
Living with a Tosa
Typical tendencies for the breed. Upbringing, training and the individual matter as much.
History
A large Japanese mastiff-type dog from the Kochi region, developed from native dogs crossed with Western mastiff breeds for dog sport in Japan. It is calm and powerful, and needs an experienced owner and careful socialisation. It is restricted in some countries.
Health
The breed can be prone to
Health tests to ask a breeder about
- Hip scores
Not every Tosa is affected, and this isn't a diagnosis. Read about common conditions and when to see a vet.
Cost to keep
Highest than average- Food, insurance and medicines cost more for a big dog
- Little or no professional grooming needed
- A 10–12 year commitment
- Budget for breed-related health checks or insurance
A relative guide, not a price — costs vary a lot by country, insurer and lifestyle.
Is a Tosa right for you?
Could suit
- Calmer households and owners who prefer gentle walks
- People who'd rather not spend much time grooming
Think twice if
- This is your first dog — an independent breed can be a challenge to train
- Space, food and vet costs are a concern — giant breeds need more of all three
Not sure? Try the breed finder or read choosing the right dog breed.
Common questions
How big does a Tosa get?
Adult Tosas typically stand about 55–65 cm at the shoulder and weigh around 36–60 kg. Individuals vary, and males are often larger than females.
How long do Tosas live?
Typically 10–12 years. Keeping them lean, active and up to date with vet checks gives the best chance of a long, healthy life.
How much exercise does a Tosa need?
As a guide, around 30–60 minutes a day, split between walks, play and sniffing time. Puppies and older dogs need shorter, gentler sessions.
How much grooming does a Tosa need?
An occasional brush is plenty. Check ears, teeth and nails as part of the routine.
Are Tosas easy to train?
Often independent-minded, so training needs patience, consistency and high-value rewards.
Do Tosas shed?
A little. Regular brushing keeps loose hair under control.
Are Tosas good with children?
They're often better suited to adults or older, calm children. Always supervise young children with any dog, and teach them to give the dog space.
Can a Tosa live in a flat?
It's usually a challenge — as long as they get enough daily exercise and time outdoors.
What health problems do Tosas have?
The breed can be prone to bloat (gastric torsion), hip dysplasia. Not every Tosa is affected — ask a breeder about health testing, and your vet about what to watch for.
Written by Petopedia as general guidance, not veterinary advice. Ask your vet about health screening for this breed.
Breed details
- Country of origin
- Japan
- Type
- Molossian type
- Internationally recognised
- 1964