Korn Ja cat breed: facts, temperament and care
A rare small cat from Thailand, usually described as black or dark with yellow eyes, with a thin written record and no major registry recognition.
Also known as Korn Ja cat, Kornja
Quick facts
| Origin | Thailand |
|---|---|
| Size | Small |
| Typical weight | 6-11 lb (2.7-5 kg), as reported by breeders |
| Coat length | Short |
| Coat | Short coat; descriptions differ between sources |
| Colours and patterns | Reported mainly as solid black, with grey and lilac also mentioned |
Recognition
| Cat Fanciers' Association | Not recognised by the CFA |
|---|---|
| How common | Very rare |
Temperament and care (1 low, 5 high)
| Affection | 4 |
|---|---|
| Energy | 3 |
| Playfulness | 3 |
| Talkativeness | 3 |
| Grooming needed | 1 |
| Shedding | 3 |
| Good with children | 3 |
| Good with other pets | 3 |
| Happy alone | 3 |
| Trainability | 3 |
| Suits a small home | 4 |
Best suited to
| Suits | A dedicated rare-breed enthusiast who is happy to rely on a breeder's records. |
|---|---|
| Less suited to | Anyone who wants a breed with a registry, a written standard or health data. |
About the Korn Ja
The Korn Ja is a little-known cat from Thailand. It is usually described as a small, short-coated cat in solid black, sometimes with grey or lilac coats, and with yellow eyes. It is sometimes linked to a Thai manuscript of cat illustrations from around 1900, but the details are thin and some of them are not backed by a reliable record. Different descriptions disagree, and one even calls the cat hairless, which does not match other accounts. For that reason only the points that most accounts share are given here.
No major registry that we know of lists the breed in its championship classes. It is hardly seen outside Thailand, and reputable breeders in North America are hard to find. Treat any claim of an ancient pedigree with caution until it can be checked.
Temperament and living with one
No reliable description of the Korn Ja's temperament could be found, and the breed's behaviour should not be assumed from its looks. The Thai breeds that are better documented, such as the Korat and the Burmese, are social and people-oriented, but that does not show the Korn Ja is the same.
Spend time with the cat and its parents before you commit. Ask about temperament in the family line.
Care: coat, food and play
A short coat needs little work. Comb weekly, trim nails and check teeth and ears. Feed a complete diet in measured portions. Provide climbing space, scratching posts and daily play, as for any cat.
Health
No breed health information exists. Because the population is small and poorly documented, the usual risks of limited breeding stock apply, such as inherited disease and loss of variation. Ask your vet for a full health check on any kitten, and ask a breeder for written records of the parents, vaccination and any tests.
Is it right for you?
The Korn Ja is for an owner who accepts that facts about the breed are limited. Anyone who wants a black cat with a more reliable record could look at the Bombay, and for a Thai breed with a documented history consider the Korat.
Profile last reviewed November 7, 2026