What Is Wagyu? A Plain-English Guide to Japanese Beef
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Wagyu (和牛) simply means "Japanese cattle". Wa means Japanese and gyu means cow. Today the word is used all over the world, and that causes a lot of confusion. This guide explains what real Japanese Wagyu is, where it comes from, and why it tastes like nothing else.
The short answer
Japanese Wagyu is beef from one of four native Japanese cattle breeds, born and raised in Japan, and graded by the Japan Meat Grading Association (JMGA). It is famous for its marbling: thin threads of soft fat running through the meat. That fat melts at a low temperature, which gives Wagyu its buttery, melt-in-the-mouth texture.
The four Wagyu breeds
Only four breeds count as Wagyu in Japan. They were formally recognised as breeds in 1944.
| Breed | Japanese name | What to know |
|---|---|---|
| Japanese Black | Kuroge Washu (黒毛和種) | By far the largest breed, around 90% of all Wagyu. Known for the finest, densest marbling. Almost all A5 beef, including Kobe, comes from this breed. |
| Japanese Brown | Akage Washu (褐毛和種), also called Akaushi | Raised mainly in Kumamoto and Kochi. Leaner, with a beefier flavour. |
| Japanese Shorthorn | Nihon Tankaku Washu (日本短角種) | Raised mainly in northern Japan. Lean, often grass-fed for part of its life. |
| Japanese Polled | Mukaku Washu (無角和種) | A hornless breed. Very rare today. |
All Wagyu Reserve beef is Japanese Black (Kuroge Wagyu), graded A4 or A5.
Bloodlines within the Japanese Black
Inside the Japanese Black breed there are well-known family lines. The most famous is the Tajima line from northern Hyogo Prefecture, which produces Kobe beef. Other lines, such as Shimane and Kedaka (Tottori), were bred for size or growth. Modern Japanese Black cattle often mix these lines to balance marbling, size and growth.
How Wagyu cattle are raised
- Breeding farms raise calves for their first months. Every calf gets a 10-digit ID number at birth, and its family tree is recorded.
- Fattening farms buy the young cattle at auction and raise them slowly, usually on a diet of rice straw and grain, in small groups with low stress.
- Wagyu are typically finished at around 28 to 30 months old. That is older than most UK beef cattle. The long, slow feeding is what builds the fine marbling.
You may have heard that Wagyu are massaged or given beer. These stories are mostly myths. A few farmers have done this, but it is not standard practice and it is not why Wagyu is marbled. The marbling comes from genetics, diet and time.
Japanese Wagyu vs wagyu from other countries
Wagyu genetics left Japan before Japan stopped exports (live cattle went to the US in 1976 and more followed in the 1990s). Since then Australia, the USA, the UK and others have built their own herds. That beef can be very good, but it is a different product.
| Japanese Wagyu | Wagyu from other countries | |
|---|---|---|
| Where born and raised | Japan | Australia, USA, UK, etc. |
| Genetics | 100% Japanese breed | Often crossbred. "F1" means 50% Wagyu, usually crossed with Angus or Holstein. "Fullblood" means 100% Wagyu genetics. |
| Grading | JMGA grades, e.g. A4, A5 | Own systems, e.g. Australian "MS" scores, which are not the same scale |
| Marbling | A5 has the most intense marbling in the world | Ranges widely; top Australian fullblood can be very high |
| Traceability | 10-digit national ID for every animal | Depends on the producer |
A useful rule: if a product just says "Wagyu" with no country, grade or ID, it is probably not Japanese Wagyu. Read our guide on how to buy real Japanese Wagyu.
"Japanese beef" is not always Wagyu
In Japan, beef from any cattle raised in Japan, such as Holstein dairy cattle, is called kokusangyu (domestic beef). Only the four breeds above are Wagyu. So "Japanese beef" and "Japanese Wagyu" are not the same thing.
Why it costs so much
- Long feeding: around 28 to 30 months of care and feed per animal.
- Small scale: most Japanese farms are small, family-run operations.
- Strict grading: only part of the herd reaches A5.
- Import costs: export-licensed processing in Japan, freight and cold-chain handling to the UK.
The good news: because A5 is so rich, you need far less of it than a normal steak. Around 100 to 150g per person is plenty. See how much Wagyu per person.
