Understanding the Wagyu Grading System: A Comprehensive Guide to Evaluating Beef Quality
The term “Wagyu” refers to a specific breed of Japanese beef cattle. In fact, Wagyu is literally translated as Japanese (“Wa”) cow (“gyu”). There are actually four types of cattle that fall under the umbrella of Wagyu cattle, but approximately 97% of Wagyu beef raised in Japan today comes from the Japanese Black breed. These are the cows that produce the tell-tale rich marbling, buttery flavor, and melt-in-your-mouth texture that Wagyu connoisseurs are willing to pay top dollar to enjoy.
In this guide, we’re looking into how Wagyu grades are assigned and what goes into creating the most craveable steaks ever.
How is Wagyu Beef Graded?
In the United States, we’re mostly used to USDA-style beef grading that assigns steaks a designation like Choice or Prime. But Wagyu beef grades have different criteria and structure. Every Wagyu sold on the market comes with a letter grade and a number grade combined into one two-digit designation.
Yield Grade
The letter grade on your Wagyu steak represents its yield grade, which reflects the percentage of edible or saleable meat from the cow.
The yield grading scale is as follows:
- Grade A: More than 72% yield (above standard)
- Grade B: 69% to 72% yield (standard)
- Grade C: Less than 69% yield (below standard)
A Grade A Wagyu has a yield that exceeds the standard, Grade B maintains the standard, and Grade C falls below it. This grading helps gauge the quality of the cattle from which the meat is sourced, based on several factors including ribeye area, short rib thickness, subcutaneous fat, and the weight of half the cow.
Quality Grade
The numerical value in Wagyu's quality grade indicates the meat's quality score. The scale runs from 1, representing the lowest quality grade, to 5, symbolizing the highest. Higher numbers reflect a superior quality score.
Quality grades reflect a combination of the following criteria:
- Beef Marbling Score (BMS): Wagyu should have a favorable ratio of fat to lean meat — in other words, the more fat there is, the better grade it will get (to an extent, anyway).
- Beef Color Standard (BCS): Wagyu meat coloring should be in the middle of the spectrum. Steaks that are too light or too dark of a meat color are knocked down the grading ladder.
- Beef Fat Standard (BFS): Fat should be glossy and light, not the matte, globular fat often seen in less delicious steaks.
- Firmness: High-quality beef has a special mouthfeel that’s firm yet tender. You should be able to bite it easily, but you don’t want a steak that’s mushy.
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Texture: Texture is how all the components come together. Does the beef fat melt into the muscle? Is the fat well distributed, so you can enjoy a creamy bite instead of stringy bits of fat and meat?
Ultimately, Wagyu quality grading looks like this:
- 5: Extremely Good (BMS of 8-12)
- 4: Very Good (BMS of 5-7)
- 3: Average (BMS of 3-4)
- 2: Equivalent to Average (BMS of 2)
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1: Inferior (BMS of 1)
A5 Wagyu grades is the highest grade Wagyu and is recognized as the pinnacle of quality in the market, signifying the most superior Wagyu beef available. Under the Japanese grading system, a C1 classification of Wagyu beef is the lowest final grade and indicates meat with less marbling and lower quality compared to higher grades.
Does Fullblood Wagyu Impact Beef Grading?
Yes, Fullblood Wagyu—Wagyu cattle with 100% pure Japanese genetics and no crossbreeding—tends to achieve higher grades due to its exceptional marbling, texture, and flavor profile. The Japanese grading system places heavy emphasis on marbling, meat color, texture, and fat quality, which is why Fullblood Wagyu often earns A4 to A5 grades, outperforming crossbred or lower-quality Wagyu.
However, genetics alone don’t guarantee a top grade. Factors like feeding, handling, and processing play a crucial role in determining the final classification. Even Fullblood Wagyu can receive a lower grade if it lacks the required marbling, meat quality, or fat consistency due to poor farming or feeding practices.
Types of Wagyu Beef and How That Impacts Grading
Wagyu grading scales differ slightly depending on where the meat is raised, graded, and sold.
Japanese Wagyu
Japanese Wagyu beef is overseen by the Japanese Meat Grading Association (JMGA). The Japanese grading system follows the familiar letter and number grading scale outlined above.
American Wagyu
Beef in the United States is graded by the USDA, which puts all beef into three primary categories: Select, Choice, and Prime. The best meat falls into the USDA Prime category, and that includes Wagyu, thanks to the meat’s impressive marbling, coloring, and texture.
Australian Wagyu
Australia’s system for grading Wagyu also takes its cue from Japan’s methodology, but in the Australian Wagyu grading system, quality grades are capped at a 9, rather than 12. Still, the overall 1 through 5 rating paired with a yield letter is similar enough that you can expect an A5 in Japan and an A5 in Australia to be nearly identical.
Try Wagyu Beef at Home
Wagyu beef grading systems can give you a strong indicator of what type of steak you’re bringing home, but the best way to get to know your beef is to try it for yourself. Hold your own at-home taste test with steaks from one of our Wagyu bundles. If you’re not sure which steak fits the bill, wrap up an Allen Brothers gift card. We offer both physical and email gift cards, so you can get your tasty surprise to the recipient no matter where they happen to be.
Wagyu Grades FAQS
What does Wagyu taste like?
Wagyu is distinctly beef, but with a mild finish that’s more buttery than gamey. Some people say it tastes slightly nutty, but the overarching sensory takeaway is a steak that is incredibly rich and juicy.
What is the highest grade of Wagyu?
The highest grade of Wagyu is labeled as A5 Japanese Wagyu. This indicates beef that has the best possible yield as well as the highest score for marbling, color, fat standard, firmness, and texture.
How do you determine the grade of Wagyu?
Wagyu grades are determined by evaluating each cow’s yield as well as the meat’s quality. Wagyu classification take into account everything from the thickness of the steak to the meat’s marbling and color.
Is A4 or A5 Wagyu better?
A5 Wagyu is the highest quality Wagyu on the market and indicates a slightly better quality than you’d get from a steak labeled as A4.
Is Kobe a type of Wagyu?
Kobe beef is a type of Wagyu sourced from a single strain of cattle, called Tajima-Gyu, raised in the Hyogo prefecture. Kobe beef is raised in luxury, with the cattle receiving sake massages and listening to classical music to help produce a steak that is unbelievably lush and delicious.
What is marbling in Wagyu?
Marbling refers to the fine intramuscular fat dispersed throughout the meat, giving Wagyu its signature buttery texture, juiciness, and rich umami flavor. The higher the marbling, the more tender and flavorful the beef. Wagyu beef ratings consider the Beef Marbling Score as part of the quality grade.


