What Is Wagyu Beef? F1 vs Full-Blood, Grading & How to Cook It

"Wagyu" gets used as a byword for expensive steak, but like Angus, it's a breed name first. What varies enormously — and what actually determines the price you pay — is how much Wagyu genetics an animal carries and how it graded.

Wagyu is a breed, not a grade

Wagyu (literally "Japanese cattle") is a group of Japanese cattle breeds developed over centuries for one trait above all: the ability to marble intramuscular fat far more heavily than most other cattle. That marbling is what gives Wagyu its buttery texture and low melting point.

F1 vs full-blood vs purebred

This is the distinction that actually matters for your wallet:

• F1 Wagyu — first-cross: one Wagyu parent, one non-Wagyu parent (commonly Angus in Australia). Roughly half Wagyu genetics. This is the most common tier sold by Australian butchers and the one we carry — real marbling lift over standard beef, at a fraction of full-blood pricing.
• Full-blood Wagyu — both parents are Wagyu, but the animal isn't necessarily born or raised in Japan. Heavier marbling than F1, priced accordingly.
• Purebred / Japanese Wagyu (Kobe, A5, etc.) — specific Japanese bloodlines and regional certification programs (Kobe beef is a protected designation, not a generic term) with the highest marbling and the highest price. Very little of this reaches Australian retail, and "Kobe-style" on a menu almost never means the real, certified product.

Most beef marketed simply as "Wagyu beef" in Australia — including most restaurant and butcher Wagyu — is F1. That's not a downgrade; it's the practical, everyday tier of a breed that gets exponentially more expensive as the Wagyu percentage climbs.

How marbling is graded

Australia uses the AUS-MEAT marbling score (0–9+), assessed on the cut face of the ribeye. Standard grass-fed beef typically sits at 0–2. F1 Wagyu commonly grades in the 4–6 range — a clear step up. Full-blood and Japanese Wagyu can reach 7–9+, where the marbling is so heavy the meat looks almost pink-white rather than red. Higher isn't always "better" for every dish — a heavily marbled steak is rich in small portions but can feel one-note if you're used to a leaner steak.

Does the extra marbling change how you cook it?

Yes, a little. The higher fat content makes Wagyu more forgiving than a lean cut, but it still rewards restraint:

• Season simply — just salt. Wagyu's flavour is the point; heavy marinades and sauces waste it.
• Cook hot and fast — a hot pan or grill renders the surface fat and marbling quickly without overcooking the centre.
• Pull it at medium-rare — around 52–55°C internal. Past medium, the rendered fat starts to taste greasy rather than rich.
• Rest it — as long as you cooked it, so the fat re-sets through the meat instead of pooling on the board.
• Portion smaller — because Wagyu is richer, 150–200g per person is usually enough, versus 200–250g for a standard steak.

Our Wagyu

We carry F1 Wagyu — Wagyu genetics over the same grass-fed Angus base as the rest of our beef — in scotch fillet, porterhouse, rump and mince. Browse the Wagyu range, or for the base breed behind it, read what is Angus beef.