Tosa Ken

USD $600-$1000 Price Avg.

Guard Dogs


Cross Breed

Breed Type

Large, Giant


10-12 years


Breed Information

Group Guard Dogs
Popularity/Rank 352
Origin Japan
Other Names Japanese Fighting Dog, Japanese Mastiff, Japanese Tosa, Tosa Fighting Dog, Tosa Inu, Tosa Ken, Tosa Tōken
Breed Type Cross Breed
Price (Avg.) USD $600-$1000
How much does it cost to purchase a Tosa Ken?
The price of a Tosa Ken will vary from breeder to breeder as well as from place to place. As a rough guide, you should expect to pay between $600 to $1000 per Tosa Ken if you purchase from a reputable breeder. Prices will be higher for show-quality dogs with a distinguished pedigree. Adult dogs who have already been trained may cost even more. It is usually less expensive to adopt a Tosa Ken through a shelter.
Size Large, Giant
Weight Male: 88-176 lbs (40-80 kg),
Female: 84-120 lbs (38-54 kg)
Height Male: 22-24 inches (55-62 cm),
Female: 21-24 inches (54-60 cm)
Lifespan 10-12 years
Recognized by
Not recognized by the American Kennel Club. And Not recognized by FCI.
Purpose Protection
Date of Origin 18th century
Ancestry Japanese

Appearance & Maintenance

Coat Dense, Hard
Coat Colors Black, Brindle, Brown, Fawn, Yellow
Grooming Level
Shedding Level
Eye Color Possibilities Black, Brown, Amber, Hazel
Nose Color Possibilities Black, Brown, Pink, Red, Blue
Coat Color Possibilities Fawn, Brindle, Red, Black, White
Coat Length Medium
Coat Density Medium
Coat Texture Double-Coated
Recommended Brushes Slicker brush, Pin brush, Undercoat rake, Shedding blade, Nail clippers, Grooming scissors.
Brushing Frequency Once a week

Breed Characteristics

Temperament Aggressive, Brave, Fearless, Intelligent, Sensitive, Suspicious
Sensitivity Level
Affection Level
Social Interaction Required
Watchdog Ability
Biting Force Low
Impulse to Wander or Roam
Prey Drive
Tolerates Being Left Alone
Fighting Dog Yes

Good & Friendly with

Apartment Life Friendly
Stranger Friendly
Cat Friendly
Dog Friendly
Office Friendly No
Senior Citizens Friendly
Pet Friendly
Friendly with First Time Owners No
Service Dog Not really
Therapy Dog Not really
Detection, Sniffer or Security Dog Not really
Search and Rescue Dog (SAR) Not really
Boat Dog Not really
Cart Pulling or Drafting Dog Yes

Health Elements

Health Issues
Health Problems Bloat
Hypoallergenic No
Energy Level
Exercise Required
Sleeping Required
Weight Gain Potential
Weather & Climate Tolerates warm and cold weather.
Stinkiness Medium
Drooling tendency
Activity Level Moderate
Rec. Walk Mileage Per Week 20 miles
Minutes of Activity Per Day 60 minutes

Food & Costing

Avg. Daily Food 4 to 7 cups of high-quality dry food a day, divided into two meals.
Cups Per Day 3.5 cups
Daily Cost $10-$20
Monthly Cost $50-$100


Gestation Duration 60-64 days
How often can the Tosa Ken have a litter? Once a year.
Litter Size 6-8 puppies (Once a year.)


The Tosa Ken is a large, powerful breed of dog that originated in Japan. It is also known as the Japanese Mastiff or the Tosa Inu. The Tosa Ken has a muscular and imposing appearance, with a broad head and strong jaws. Its coat is short and dense, usually black or brindle in color. The average lifespan of the Tosa Ken is 10 to 12 years.

The size of the Tosa Ken varies depending on its gender; males can reach up to 28 inches tall at the shoulder while females are typically smaller at 24 inches tall. Males can weigh up to 200 pounds while females typically weigh between 110 and 140 pounds. The colors of the breed range from black, brindle, red-fawn, fawn-brindle, and white-fawn.

The personality of the Tosa Ken is loyal and devoted to its family but can be wary of strangers if not properly socialized from an early age. They are intelligent dogs that need consistent training and firm leadership in order to thrive in their environment. They are also very protective of their family members which makes them excellent guard dogs if trained properly for this purpose.

Tosa Kens are generally friendly with other dogs but may be aggressive towards strange animals if not socialized properly from an early age or if they feel threatened by them in any way. They tend to be good with children as long as they have been raised around them since puppyhood; however, due to their large size they should always be supervised when interacting with small children just like any other breed of dog would require supervision when interacting with small children for safety reasons .

The temperament of the Tosa Ken is calm yet alert; they make excellent watchdogs due to their alertness but do not bark excessively unless provoked or alarmed by something unusual happening around them .

The health issues associated with this breed include hip dysplasia, elbow dysplasia, eye problems such as cataracts or glaucoma , heart disease , skin allergies , bloat , hypothyroidism , entropion (inward rolling eyelids) , ectropion (outward rolling eyelids) , luxating patellas (dislocated kneecaps) . It's important for potential owners to research these health issues before purchasing a puppy so that they can ensure that it comes from a reputable breeder who screens for these conditions prior to breeding .

Tosas have an average adaptability level; they do best in homes where there is someone home most days so that they don't become bored or lonely when left alone for extended periods of time . They do well living both indoors and outdoors provided that there is adequate shelter available outside during cold weather months .

Overall Tosas make great pets due to their loyalty and devotion towards their families; however potential owners should keep in mind that this breed requires consistent training throughout its life due its large size which could potentially pose safety risks if it isn't trained properly . Additionally potential owners should research all health issues associated with this breed prior purchasing a puppy so that it comes from a reputable breeder who screens for these conditions prior breeding .


The Tosa Ken is a large, powerful dog that was originally bred in Japan for the purpose of dog fighting. The breed nearly became extinct after World War II, but has since made a comeback and is now popular in both Japan and the United States.

The Tosa Ken is thought to be descended from the mastiff-type dogs brought to Japan by the Portuguese in the 16th century. These dogs were then crossbred with native Japanese breeds, resulting in a large, powerful dog well-suited for fighting. Dog fighting was a popular sport in Japan for many centuries, and the Tosa Ken quickly became the most popular breed for this purpose.

After World War II, dog fighting was outlawed in Japan and the Tosa Ken breed nearly became extinct. However, a few dedicated breeders kept the breed alive and eventually began exporting them to the United States where they quickly gained popularity as both companion animals and guard dogs. Today, the Tosa Ken is recognized as a distinct breed by both the American Kennel Club and the Japanese Kennel Club.