Wagyu Decoded: The Four Breeds, the Meaning of A5, and How It Is Served

Updated October 15, 2026 | By Tokyo Paul

The slice on the plate looks more like pink marble than meat. Fine threads of white fat run through it like frost on a window, and when it touches a hot grill the surface glistens within seconds. In a Japanese restaurant the portion may be small, sometimes only a few thin pieces, and nobody finds that strange. This is wagyu, a beef that has become one of Japan's best-known foods, and also one of the most misunderstood.

The word means Japanese cattle (wa for Japan, gyu for cow), and it names a group of breeds rather than a single product. Labels such as A5, BMS, and Kobe appear on menus, shop windows, and packaging, yet few visitors can say what they mean. Knowing the basics makes it easier to order well, to avoid paying for a name you do not need, and to appreciate the care behind the meat.

Four Breeds Under One Name

Four breeds count as wagyu. The Japanese Black is by far the most common, making up roughly 90 percent or more of the total, and it is the source of the heavily marbled beef that made the name famous. The Japanese Brown, also called Akaushi, is raised mainly in Kochi and Kumamoto, and makes up around five percent of beef cattle. It generally carries less marbling than the Black breed.

The two smaller breeds are the Japanese Shorthorn, found mainly in Iwate Prefecture, which accounts for under one percent of wagyu, and the Japanese Polled, raised mostly in Yamaguchi Prefecture. Together the four were formally recognized in 1944. Only the Black breed consistently produces the dramatic marbling. If you see leaner wagyu on a menu, it is often from one of the other breeds, and it can be an excellent choice for those who find the richest cuts heavy.

From Work Animal to Delicacy

For much of Japanese history, cattle were farm workers. An imperial decree in 675 by Emperor Tenmu banned the eating of meat from several animals, including cattle, and for centuries beef was uncommon on the table, partly for religious and cultural reasons. Cattle plowed fields and carried loads, and their value lay in labor, not in the kitchen. Some people reportedly kept eating cattle despite the decree, but beef never became a mainstream food before the modern era.

That changed when Japan opened its ports in the 1850s and 1860s. Foreign residents in Yokohama and Kobe wanted beef, and Kobe opened its first slaughterhouse in 1868, at the start of the Meiji era. Foreign cattle were imported and crossbred with local animals, though the experiment was later abandoned, and breeders focused on developing the native lines into what they called improved wagyu. Careful selection over generations gave the beef its modern character.

Reading the Grade: What A5 Means

Japan grades each carcass on two scales. The yield grade, from A to C, estimates the share of usable meat. A means a yield standard value of 72 or higher, B covers 69 to under 72, and C is below 69. The meat quality grade runs from 1 to 5 and looks at four things: marbling, color and luster, firmness and texture, and the color and quality of the fat. The lowest of those four scores sets the final number.

An A5 label therefore means top yield and top quality. Marbling is scored separately with the Beef Marbling Standard (BMS), a scale from 1 to 12. A BMS of 8 to 12 corresponds to quality grade 5, 5 to 7 to grade 4, and 3 to 4 to grade 3. Grading is managed by the Japan Meat Grading Association. A5 is a measure of marbling and appearance, not a guarantee that it suits every palate. Some diners prefer the more balanced taste of A4.

Kobe, Matsusaka, Omi, and Other Brands

Japan has hundreds of regional wagyu brands, with more than 320 by one count, and the best known carry the name of a place. Kobe beef must come from Tajima-strain Japanese Black cattle born and raised in Hyogo Prefecture, either steers or heifers that have never calved. It must have a BMS of 6 or higher, a quality grade of 4 or 5, and a yield grade of A or B, with a carcass weight no higher than 499.9 kilograms. Only around 3,000 animals a year qualify.

Other celebrated brands include Matsusaka beef from Mie Prefecture, traditionally from virgin female cattle, and Omi beef from Shiga, which is said to have a history of roughly 400 years. Miyazaki beef, from Kyushu, has done well in recent national wagyu competitions. Each Kobe animal is tracked with a ten-digit number throughout its life, and the Kobe Beef Marketing and Distribution Promotion Association, formed in 1983, sets the standards for the trademark. Certified Kobe restaurants can usually show documentation for the beef they serve.

How Japan Serves Wagyu

Because the fat is soft and rich, Japanese menus treat wagyu with restraint. Typical portions are small, often a hundred grams or so for a steak, and the cooking is usually kept simple to let the beef speak. Teppanyaki chefs sear cuts on a hot iron plate and slice them at the counter. At yakiniku (grill-your-own) restaurants, you cook bite-size slices over charcoal or gas and dip them in sauce. Sukiyaki simmers thin slices in sweet soy broth and dips them in raw egg, while shabu-shabu swishes them through hot dashi.

Wagyu is also served raw in some restaurants, as sashimi or as thin slices on rice. The price range is wide. A lunch set at a yakiniku or steak restaurant can cost a few thousand yen (a few tens of dollars), while a dinner of top-brand beef can run well over 10,000 yen (about 65 USD) per person. Lunch is usually the most affordable way to try high-grade beef, and many restaurants offer a smaller sampler of different cuts.

Wagyu Beyond Japan

In the 1970s, Japanese stock formed the basis of wagyu herds in the United States and Australia, and Australia now has the largest breed association outside Japan. Canada and other countries export wagyu too. Beef imports to Japan were liberalized in 1991, which pushed Japanese farmers to concentrate on higher-quality Japanese Black cattle, a shift that helped raise the standard of the domestic product.

The first exports of Kobe beef began in 2012, with an initial shipment to Macau. Today, the word wagyu can mean different things abroad: Japanese-origin beef with full documentation, or beef from wagyu-lineage cattle raised elsewhere, sometimes crossed with other breeds. Both can be good, but they are not the same. If authenticity matters to you, look for a clear origin statement and for Kobe beef, the ten-digit identification number.

Plan Your Visit

When you order, ask for the brand and grade, and do not feel pressured toward the highest A5 on the list. A4 can be lighter, and a sampler set shows the difference between cuts. Many restaurants in Tokyo, Osaka, Kobe, and Kyoto provide English menus, but it helps to book ahead for dinner, particularly for counter seats and well-known names. Lunch sets are the easiest entry point.

Prices, grades, and brand rules can change, so confirm details with the restaurant or with the official brand association. For travelers heading to Hyogo, the city of Kobe has restaurants that specialize in the local beef, and Matsusaka in Mie and Omi in Shiga offer their own brand-focused places. Eat slowly, take small bites, and pair it with rice, vegetables, or a light drink; the beef is rich enough to carry the meal.