What Are Japanese Wagyu Grades and Why Do They Matter?

It's mid-October in Nagoya, and the city is buzzing. The 2026 Asian Games have just wrapped up, and the streets around Osu are still filled with visitors from across Asia and beyond — many of them, I've noticed, scanning menus on their phones and asking the same question in one form or another: "Is this wagyu really as good as it says? What do all those grades actually mean?"

Japanese wagyu grading is one of those topics that sounds intimidating at first — full of letters, numbers, and terminology that doesn't translate easily. But once you understand the basic system, you'll realize something interesting: the grade tells you a lot, but it doesn't tell you everything. And that gap between the grade and the actual experience is exactly where the most memorable wagyu moments tend to live.

Who This Is For

• ✅ Visitors curious about what "A5 wagyu" actually means before ordering
• ✅ Travelers who want to go beyond well-known brands like Kobe and Matsusaka
• ✅ Anyone wondering whether rare-style wagyu is safe to eat — and how it's prepared
• ✅ Food lovers seeking wagyu experiences that are defined by story and craft, not just a number on a certificate
• ✅ Guests visiting Nagoya during or after the 2026 Asian Games who want to make the most of their food itinerary

What Does the Japanese Wagyu Grading System Actually Measure?

Japanese wagyu is graded by the Japan Meat Grading Association (JMGA) using a two-part system. The first part is a letter — A, B, or C — which refers to the yield grade, or how much usable meat can be taken from the carcass relative to its total weight. Grade A means a higher yield; Grade C means lower. Most premium wagyu sold to restaurants is Grade A.

The second part is a number from 1 to 5, which reflects quality grade based on four criteria: marbling (fat distribution), meat color and brightness, firmness and texture, and fat color and quality. Grade 5 is the highest.

Within the marbling category, a separate scale called the Beef Marbling Standard (BMS) runs from 1 to 12. An A5 wagyu must score BMS 8 or higher. A5 BMS 12 represents the maximum — intensely marbled, with fat threaded through the muscle in an almost lace-like pattern.

So when you see "A5" on a menu, it means the beef scored the highest yield and the highest quality. It's a meaningful certification. But here's where it gets more nuanced: A5 describes the carcass as a whole. Individual cuts from the same A5 animal can vary considerably in texture, flavor, and the way they respond to different cooking methods. Grade tells you about potential. What you actually taste depends on the breed, the farm's feeding practices, the specific cut, and critically — how it's prepared.

Why Does Marbling Get All the Attention — and Is More Always Better?

Marbling became the dominant conversation in wagyu partly because it's visually striking and easy to photograph, and partly because the grading system itself places significant weight on it. A highly marbled cut is undeniably beautiful — the fat melts at low temperatures, coating the palate with a richness that is genuinely unlike any other beef in the world.

But a growing number of wagyu enthusiasts — including repeat visitors to Japan who have worked their way through Kobe, Matsusaka, and Omi — are discovering that extreme marbling isn't always what they want from every dining experience. Very high BMS scores can feel overwhelming in larger portions. And some of the most interesting wagyu in Japan today comes from breeds and farms that deliberately balance marbling with lean meat flavor, creating something more complex and less one-dimensional.

This is part of what drew me to Horai Wagyu when I was developing the concept behind Itadaki. Horai Wagyu is a Kuroge Wagyu (Japanese Black) raised in the Okumikawa region of Aichi Prefecture — and what makes it unusual is exactly that balance. The cattle are fed on sake lees from Horaisen Sora, a renowned local premium sake, which contributes to a flavor profile that has both the delicacy of well-marbled wagyu and a distinct, clean lean-meat character. It grades well, but it's not bred to maximize BMS at the expense of everything else. The result is beef that rewards attention — something you actually want to eat slowly, in a format that lets you taste it properly. If you'd like to go deeper on what makes this breed so rare, our full guide to Horai Wagyu covers the farming practices and the scarcity behind just 300 heads raised per year.

✓ Key Takeaways

• The Japanese wagyu grade (e.g., A5) measures yield and quality across four criteria — marbling is one of four, not the only factor.
• BMS (Beef Marbling Standard) goes from 1 to 12; A5 requires BMS 8 or higher, but higher marbling doesn't automatically mean a better dining experience for every palate.
• Breed, feeding practice, cut selection, and cooking method all shape what you actually taste — grade is the starting point, not the whole story.

Is Rare-Style Wagyu Safe to Eat? What Does the Cooking Method Have to Do With Grading?

This is the question I hear most often from visitors who have been drawn in by the grade and the story, but pause when they see the words "rare" on the menu. It's a completely fair concern, and I want to address it directly.

In Western food safety culture — particularly in the United States and much of Europe — eating undercooked beef is widely discouraged due to the risks of E. coli and other bacterial contamination. That caution is grounded in real science about how commercial beef is typically raised, processed, and handled at scale. So when a Western visitor sees "rare wagyu," the instinct is understandable: wait, is this actually safe?

The answer, at Itadaki, is yes — and the reason comes down to a specific technique, not a general claim about wagyu being "clean" or "different." We use a proprietary two-stage cooking method developed specifically for our rare wagyu gyudon. The beef is heated to over 70°C at the core — the threshold established by Japan's Ministry of Health, Labour and Welfare for safe beef preparation. This fully meets Japan's strict food safety standards. What the technique achieves is a texture that reads as rare — silky, yielding, with the fat just beginning to soften — while the heat has done its work throughout the meat. It is not raw beef. It is not sashimi-style. It is a controlled cooking process that delivers a specific sensory experience safely.

The grade of the wagyu matters here too, but not in the way you might expect. Higher-quality wagyu — particularly beef with well-distributed marbling and excellent texture — responds better to this kind of precision cooking. The two-stage method would produce a very different result on a lower-quality cut. The quality of Horai Wagyu and Mikawa Beef from Aichi Prefecture is part of what makes the technique work as intended.

"The rare wagyu was unlike anything I've ever tasted — a life-changing culinary experience."

— Guest review

That's the response we hear most often, and honestly, it never gets old. The surprise isn't just the flavor — it's the realization that something can feel this delicate and yet be prepared with this much care and precision behind it. For a fuller look at the safety question and how Japan's food standards apply, our article on what makes Itadaki the original rare wagyu gyudon goes into more detail on the culinary philosophy behind the concept.

Does Grade Tell You Which Wagyu Experience Is Right for You?

Here is where I'd gently push back on the way wagyu is often marketed, especially to international visitors. Grade is useful shorthand. It tells you that a producer met a specific standard under a certified system. But it doesn't tell you whether the beef was raised by a farmer who has dedicated decades to a specific feeding philosophy. It doesn't tell you whether the cut was selected for a particular cooking method. And it doesn't tell you whether the restaurant serving it understands the ingredient well enough to do anything interesting with it.

Japan has roughly 500,000 wagyu cattle raised annually. Horai Wagyu accounts for just 300 of those heads, across three farms in Okumikawa. That scarcity isn't a marketing construct — it reflects a deliberate, small-scale approach to raising cattle that simply cannot be expanded without changing what makes the beef distinctive. When we limit Horai Wagyu gyudon to 10 bowls per day, it's because that's what honest sourcing at this scale actually allows.

If you've already explored Kobe beef and Matsusaka beef on previous trips to Japan, you may find that Japan's wagyu scene beyond the famous brands offers some of the most compelling discoveries available to a repeat visitor. The grade is often similar. The story is entirely different.

What Should You Actually Look for When Choosing a Wagyu Experience in Japan?

After eighteen years working with food and ingredients across Aichi Prefecture, here's what I'd suggest paying attention to beyond the grade:

Sourcing transparency. Can the restaurant tell you the farm, the region, and the feeding practice? If the answer is vague, the grade alone isn't enough information to make a meaningful choice.

Cut selection relative to cooking method. Wagyu doesn't behave the same way across all cuts or all preparations. A chef who understands the relationship between the specific cut and the specific technique will produce something qualitatively different from one who simply sources A5 and applies generic methods.

Ingredient context. Wagyu doesn't exist in isolation. The rice it's served with, the sauce it's paired against, the condiments offered alongside — all of these interact with the beef's flavor. At Itadaki, everything on the table comes from Aichi Prefecture: the rice, the miso, the pickles, the egg, the seasonings. That coherence isn't incidental — it's what creates a complete taste of a place, rather than a piece of expensive beef dropped into a generic setting.

Cooking method matched to the beef's character. This is perhaps the least discussed factor and the most important one at the actual moment of eating. Grade tells you what the raw ingredient is capable of. The cooking method determines what you actually experience.

Understanding wagyu grades gives you a useful foundation — but the most memorable wagyu meals tend to happen when you follow the story of an ingredient all the way from the farm to the bowl in front of you, and trust that someone along the way made deliberate choices at every step.

For our complete menu, access details, and store information, visit our official page at https://itadaki8.com/english/