Japan has 13 recognised dog breeds with deep roots in the country’s history. Six of them, known as the Nihon Ken, are designated Natural Monuments by the Japanese government. Three can be registered with the UK Kennel Club. One is illegal to own in Britain.
What Are the Nihon Ken?
The Nihon Ken are six native Japanese breeds officially recognised by NIPPO (Nihon Ken Hozonkai), the preservation society founded in 1928 by Dr Hirokichi Saito. All six hold Natural Monument status in Japan. They share a wedge-shaped head, upright ears, a curled or sickle tail, and the distinctive “urajiro” colouring: pale cream or white on the muzzle, chest, and underside.
NIPPO evaluates all six breeds against three core traits: Kan-i (悍威, spirited boldness), Ryōsei (良性, good nature), and Soboku (素朴, artlessness). These qualities explain why the dogs are often described as cat-like. They are independent, reserved, and dignified rather than eager-to-please.
The Six Nihon Ken
1. Shiba Inu
The Shiba Inu is the smallest Nihon Ken and by far the most common. UK Kennel Club registrations grew from 246 in 2015 to a peak of 606 in 2022, partly driven by the Doge meme (based on Kabosu, a Shiba owned by Atsuko Sato, whose photo became one of the most recognised images on the internet). By 2024 registrations had settled to 449, still making it the most-registered Japanese breed in Britain by a wide margin.
Genetically, the Shiba is classified as a basal breed, meaning it is more closely related to wolves than most modern dog breeds. This shows up in behaviour: strong prey drive, independence, and selective responsiveness to training are all well-documented traits.
Health deserves serious attention before ownership. A study of 1,244 dogs found Shiba Inus represented 33% of glaucoma cases despite making up only 2.7% of the study population. The KC recommends eye testing and gonioscopy for this reason. Patellar luxation affects up to 35% of the breed in some Japanese studies. Average UK lifespan is 14.6 years, above the purebred average of 12.7.
On temperament, a peer-reviewed study (Takeuchi et al., 2009) found a genetic link between the SLC1A2 gene and aggression toward strangers in Shiba Inus. They are not generally suited to first-time owners, especially in households with cats or small animals.
| Height | 34.5–41.5 cm |
| KC Group | Utility |
| KC Registrations 2024 | 449 |
| Lifespan (UK avg) | 14.6 years |
| KC health tests | Eye testing, gonioscopy for PLA |
For more detail on what to expect day to day, see our guide to Shiba Inu personality traits.
2. Akita (Japanese Akita Inu and American Akita)
In the UK, the Akita is listed as two separate breeds. The KC split the American Akita and Japanese Akita Inu into distinct registrations in 2006. The AKC in the US still treats them as one breed. The difference matters to UK buyers: the Japanese Akita Inu is the original mountain dog from Akita Prefecture, while the American Akita developed from post-war crosses that produced a heavier, more powerful build.
Hachiko, an Akita, became one of the most famous dogs in history when he returned to Shibuya Station almost daily for 9.5 years after his owner’s sudden death in 1925. A bronze statue was unveiled in his honour in 1934. The original was melted down during World War Two for the war effort. A replacement was installed in 1948 and still stands today.
The post-war recovery of the breed was difficult. Only around 18 documented purebred Akitas survived the war, when the Japanese government ordered citizens to surrender non-military dogs. German Shepherds were exempt, so many Akitas were crossed to avoid culling. Reconstruction of a pure Akita population began almost from scratch.
UK registrations reflect a breed in decline. American Akita registrations have fallen from 399 in 2015 to 149 in 2024, a 63% drop. Japanese Akita Inu peaked at 135 in 2022 then fell to 43 in 2024, a 68% fall in two years. The breed was granted KC championship status in November 2024, effective from Crufts 2026, which may bring renewed interest.
Health risks include VKH-like syndrome (uveodermatologic syndrome), which affects up to 4.1% of Akitas and accounts for 80% of all reported canine VKH cases. Systemic lupus erythematosus prevalence is around 5%. Average UK lifespan is 11.4 years, below the purebred average of 12.7. At least four dedicated Akita rescue charities operate in the UK (ARW, JAWT, Second Chance, and Friends of Akitas), indicating a high surrender rate for a relatively uncommon breed.
| KC Group | Utility |
| American Akita registrations 2024 | 149 |
| Japanese Akita Inu registrations 2024 | 43 |
| Lifespan (UK avg) | 11.4 years |
| KC health tests (Japanese Akita Inu) | DNA test for amelogenesis imperfecta (AI/FEH) |
3. Kai Ken
The Kai Ken is Japan’s rarest native breed. NIPPO recorded just 110 registrations in 2023. Outside Japan, the breed barely exists at all. The Kai Ken Club of Great Britain, established in 2022, currently has only one active UK breeder and estimates that at least 20 dogs from separate bloodlines would be needed before applying for full KC recognition.
The breed can be registered on the KC Activity Register as “Kai Ken WTO” in the meantime. Its striking brindle coat, ranging from black brindle to red brindle, gives it the nickname “Tora Ken” (Tiger Dog). Natural Monument status was granted in 1933.
Importing one from Japan involves the full unlisted-country process: microchip, rabies vaccination, blood titre test, a 3-month waiting period, and cargo-only transport. Total import cost typically runs £1,500 to £2,500 on top of the purchase price. Many UK importers have used the route of flying to Paris (CDG) with the dog in cabin, then taking the Eurotunnel, which is considerably cheaper than direct Heathrow import.
4. Kishu Ken
The Kishu Ken is a medium-sized, predominantly white hunting dog from the Mie and Wakayama prefectures. It was used historically to hunt boar and deer, often working alone rather than in packs. NIPPO registered 169 Kishu in 2023. Global population estimates range from under 5,000 to around 12,000, though no reliable census exists.
The breed is not KC-recognised in the UK and has no established UK breed club. It is loyal and physically capable, with strong prey drive and a tendency to bond closely with one person. It is not well suited to inexperienced owners.
5. Shikoku Ken
The Shikoku Ken is bred for hunting boar in the mountainous interior of Shikoku Island. Its movement and appearance are often compared to a wolf, more so than any other Nihon Ken. NIPPO registered 227 Shikoku in 2023, making it slightly more common than the Kai Ken or Kishu but still one of the rarest breeds outside Japan.
The breed requires an owner who understands primitive dog behaviour. It is athletic, alert, and not naturally deferential. In the right hands it is trainable, but it needs consistent handling and a great deal of exercise.
6. Hokkaido Ken
The Hokkaido Ken comes from Japan’s northernmost island and has the thickest, heaviest coat of the six Nihon Ken. It was bred by the Ainu people to hunt bear and deer in extreme winter conditions. Fewer than 200 Hokkaido Ken are born per year in Japan, and the number continues to decline. The British Association of Hokkaido Ken represents the breed in the UK, where the population is small.
The breed gained brief cultural prominence when a Hokkaido named Otōsan (Father) starred in SoftBank mobile phone advertisements from 2007, temporarily boosting popularity in Japan. Otōsan died in 2018 at age 16. The Hokkaido is not a dog for first-time owners.
KC-Recognised Japanese Breeds
7. Japanese Chin
Despite the name, the Japanese Chin was almost certainly developed in China and brought to Japan as a gift for the imperial court. It spent centuries as a companion to Japanese aristocracy and bears almost no resemblance to the hunting dogs of the Nihon Ken. It is flat-faced, silky-coated, and weighs between 1.8 and 4.1 kg.
The Japanese Chin Club, founded in 1895, is the oldest Japanese breed club in Britain. The breed received KC Championship Show status in 1946. Average UK lifespan is 12.5 years.
GM2 gangliosidosis, a fatal lysosomal storage disorder comparable to Tay-Sachs disease in humans, has been reported exclusively in Japanese Chins among all dog breeds. The breed’s coefficient of inbreeding sits at around 8.1%, above the recommended maximum of 6.25%. These factors are worth weighing up before purchasing.
8. Japanese Spitz
The Japanese Spitz was imported to the UK in the 1970s and received KC recognition in 1977. It is sometimes confused with the Samoyed or Pomeranian, but is a distinct breed developed in Japan in the early 20th century. It is adaptable, alert, and works well in families and smaller homes.
UK registrations peaked at 211 in 2021 and fell to 98 in 2024, the lowest 10-year point. Despite this, the breed has a strong show following. The GlamGlow kennel in Shropshire has produced over 95 CCs and 4 Crufts Champions. Coat maintenance is more manageable than it looks: the double coat repels dirt and dries quickly.
| KC Group | Utility |
| KC Registrations 2024 | 98 |
| KC Recognition | 1977 |
For a full breed profile, see our Japanese Spitz guide.
Other Japanese Breeds
9. Tosa Inu
The Tosa Inu is banned in the UK under the Dangerous Dogs Act 1991. Owning, breeding, selling, or giving away one carries a maximum of 6 months’ imprisonment and an unlimited fine. As of 2018, DEFRA recorded only 3 exempted Tosa Inus on the Index of Exempted Dogs in England. The breed is also prohibited in Australia, Denmark, Germany, and Norway.
The law applies to “type” rather than breed documentation. A dog that physically resembles a Tosa can be treated as prohibited regardless of what papers it carries. The burden of proof falls on the owner to demonstrate otherwise.
Outside the UK, the Tosa is a large and powerful breed with origins in Japanese dog fighting, a practice that had different cultural context in Japan. In Japan it is still kept by experienced handlers and valued for composure. In the UK, however, ownership is not a legal option. See our guide to Japanese Tosa training for those researching the breed’s characteristics from outside the UK.
10. Japanese Terrier
The Japanese Terrier is battling extinction even in Japan. It receives almost no attention from breeders and has no equivalent presence in the UK. The breed is small and energetic, kept primarily as a companion. There is no KC recognition, no UK breed club, and no established import route.
11. Ryukyu Inu
The Ryukyu Inu is native to Okinawa and differs from the mainland Nihon Ken in several ways. It is adapted to subtropical forest terrain and has partially webbed feet, an unusual trait among Japanese dogs. Population data is unclear. It is not KC-recognised, and importing one to the UK would be exceptionally difficult given how rare the breed is even in Japan.
12. Sanshu Inu
The Sanshu Inu was created in Japan in the early 20th century by crossing Aichi-Ken dogs with Chow Chows. It is not a Nihon Ken breed and has no Natural Monument status. Popular in Japan as a household companion, it is virtually unknown outside the country and has no KC recognition or UK breed presence.
13. Sakhalin Husky (Karafuto Ken)
The Sakhalin Husky is effectively extinct. As of 2015, approximately 7 known individuals remained alive. The last dedicated breeder, Sergey Lyubykh, died in 2012. No updated population data has been published since. As champion musher Isami Abe put it: “The Karafuto Ken is effectively extinct. And no one has even noticed.”
The breed was used by the Ainu people and later by Japanese military and research expeditions across Sakhalin and Hokkaido. It became widely known in Japan through the 1958 story of Taro and Jiro, two Karafuto Ken who survived being left behind during an Antarctic expedition.
Getting a Japanese Breed in the UK
Five Japanese breeds are KC-recognised and regularly bred in Britain: the Japanese Shiba Inu, American Akita, Japanese Akita Inu, Japanese Spitz, and Japanese Chin. These can be sourced through KC-registered breeders.
For the rarer Nihon Ken (Kai Ken, Kishu, Shikoku, Hokkaido), the only realistic route is importing from Japan. The process includes microchipping, a rabies vaccination, a blood titre test (minimum result 0.5 IU/ml at a DEFRA-approved lab), a 3-month waiting period from the blood draw, tapeworm treatment, and cargo-only transport via an approved UK entry point. The minimum age at UK entry is 15 weeks. Build in 7 to 9 months of lead time and budget £1,500 to £2,500 for transport costs on top of the purchase price.
The Kai Ken Club of Great Britain (kaiken.co.uk), the British Association of Hokkaido Ken, the Association of Nihon Ken (nihonken.co.uk), and the Japanese Shiba Inu Club of Great Britain are the main contact points for UK enthusiasts of the rarer breeds.
