Why 烧肉 牛里脊 is Red Meat

A Simple Question When Ordering “牛里脊” at 烧肉 Restaurants

Hello everyone. This is 黑5’s Sondo.

When you visit a 烧肉 restaurant, which cut of meat do you usually order first? Salted beef 牛舌 for a refreshing start, 牛五花 for its sweet marbled fat, or 牛里脊 for the deep flavor of lean red meat? These are the undisputed three treasures of 烧肉. 牛里脊, in particular, has earned passionate support from health-conscious guests and mature gourmets who find heavy fat a bit too rich, because it offers the pure, direct taste of beef without feeling heavy.

However, have you ever noticed a curious discrepancy?

When you look at “牛里脊” cuts (like sir牛里脊 or 眼肉 牛里脊) at a steakhouse or a high-end butcher shop, you see meat heavily marbled with white fat (sashi), representing a very rich and juicy dining experience. On the other hand, when you order “牛里脊” (ro-su) at a standard 烧肉 restaurant in Japan, what arrives at your table is almost always a deep red, lean cut with very little marbling.

“Why is steak 牛里脊 so marbled and rich, while 烧肉 牛里脊 is so lean and red?”

In fact, this “牛里脊 = red meat” phenomenon in Japanese 烧肉 restaurants is not a coincidence. It is deeply connected to the history of beef distribution in Japan and a major event that once shook the entire nation. Today, I would like to share the historical background of why 烧肉 牛里脊 is red meat, and introduce the premium red 牛里脊 cuts we serve at 黑5.

The Original Form of “牛里脊”: Why Sir牛里脊 and 眼肉 are True 牛里脊 Cuts

Before diving into the history, let us first clarify the original meaning and culinary definition of the word “牛里脊” (ro-su in Japanese).

The Japanese term “ro-su” is said to be a corruption of the English word “roast.” Historically, it referred to “cuts of meat suitable for roasting or grilling.” Anatomically, the 牛里脊 refers to the long, thick muscle group running along the backbone, starting from the head: shoulder 牛里脊 (chuck eye), 眼肉 (rib 牛里脊), and sir牛里脊 (strip 牛里脊).

These back cuts undergo relatively little movement compared to other parts of the cow, making the meat exceptionally fine-grained and tender. Furthermore, in A5-grade Japanese Black 和牛 (Kuroge 和牛), these cuts develop beautiful, web-like marbling (sashi). Sir牛里脊 and 眼肉, which melt at body temperature to release a rich sweetness and elegant aroma, are what anatomically constitute “true 牛里脊.”

Why, then, did this rich, marbled premium cut turn into “lean red meat” at 烧肉 restaurants? The key to this mystery lies in the development of Japanese 烧肉 culture from the Showa to the Heisei eras.

The Historical Turning Point: How the BSE Crisis and Imported Beef Created “Red 牛里脊”

Two major historical factors established the common understanding of “烧肉 牛里脊 = red meat” in Japan.

The first factor was the rise of casual, family-friendly 烧肉 restaurants. Looking back at Tokyo about 30 years ago, it was standard at most 烧肉 restaurants for “牛五花” to be short rib (bara) and “牛里脊” (ro-su) to be imported back 牛里脊 (sir牛里脊 or 眼肉). By the way, the raw beef dish “yukhoe” (yukke), which was highly popular back then, was also prepared by meticulously hand-trimming the excess fat and tendons off this imported back 牛里脊.

Back 牛里脊 from imported cattle raised overseas on grass or grain does not develop the intense marbling characteristic of Japanese 和牛; it is lean, muscular red meat. Imported back 牛里脊 was lean and refreshing, yet soft and easy to eat as back meat. As casual restaurants continued to serve this imported back 牛里脊 as “牛里脊,” it created a strong association in the minds of Japanese consumers: “烧肉 牛里脊 is a lean, red, and refreshing cut.”

The second factor, which permanently solidified this standard, was the BSE (Bovine Spongiform Encephalopathy) crisis that hit Japan in 2001.

In the autumn of 2001, news of the first BSE-infected cow in Japan sent the nation into a panic. Beef consumption plummeted, and anxiety regarding imported beef surged. Because demand dropped suddenly overnight, the market price of domestic 和牛 fell to historically low levels. High-quality 和牛 was traded at incredibly low prices.

During this crisis, 烧肉 restaurants faced a major dilemma. They wanted to reassure their guests by serving safe, domestic beef, but even with the price drop, serving 和牛 sir牛里脊 or 眼肉 at standard 烧肉 prices was financially unsustainable.

This led 烧肉 chefs to focus on a different cut of domestic 和牛: the round (momo).

The round is located in the hindquarters. Because these muscles are used frequently, they develop little marbling, resulting in solid red meat. Due to the market crash, 和牛 round became highly affordable. Crucially, the bright red appearance of sliced 和牛 round looked exactly like the “imported sir牛里脊 牛里脊” that customers were used to seeing.

“We can serve this as ‘牛里脊’ without any visual confusion. What is more, 和牛 round has a far stronger, deeper umami flavor than imported beef, making it exceptionally delicious!”

烧肉 restaurants across Japan quickly began listing domestic 和牛 round on their menus as “牛里脊.” The rich flavor of domestic red meat matched the existing image of red 牛里脊 perfectly, earning rave reviews from customers. Even after the market stabilized, the convention of serving domestic 和牛 round as 牛里脊 remained, becoming a permanent part of Japanese 烧肉 culture.

Furthermore, import restrictions triggered by the BSE crisis (particularly the ban on US beef imports) meant that cheap imported beef stopped entering the market, further accelerating the adoption of domestic 和牛 lean round meat. However, this history has led to a highly ironic “topsy-turvy” (abeko-be) phenomenon in today’s 烧肉 industry.

Originally, “牛五花” referred to short rib/plate (bara—the fatty belly meat) and “牛里脊” (ro-su) referred to sir牛里脊 or 眼肉 (the marbled back meat). Yet, through these historical twists, most 烧肉 restaurants now standardly use lean round meat (momo) for 牛里脊. On the other hand, many restaurants today serve premium marbled 眼肉 or sir牛里脊 cuts as “牛五花” instead of the traditional fatty short rib.

In other words, the original relationship where “牛五花 = fatty belly” and “牛里脊 = marbled back” has been completely reversed in the modern era to “牛里脊 = lean round” and “牛五花 = marbled sir牛里脊/眼肉.” Enjoying your 烧肉 while knowing this historical swap makes for a truly fascinating dining experience.

黑5’s Premium A5 Grade Red 牛里脊: Characteristics of 芯芯肉 and 龟之子

Building on the historical tradition of “烧肉 牛里脊 = red 和牛 round,” we at 黑5 select only the highest quality round cuts from A5-grade Black 和牛, elevating them into an exquisite dining experience.

The round cut we primarily use is called “Shintama.” It is a large, flavorful muscle block that our chefs meticulously hand-carve into specific sub-cuts, bringing out their unique individual qualities. Here are 黑5’s two signature red 牛里脊 cuts:

芯芯肉: A Mellow Harmony of Lean Meat and Fine Marbling

芯芯肉 is a highly prized, rare cut located at the very center of the Shintama block. Although part of the round, it features an exceptionally fine texture and is laced with delicate, soft marbling. When it touches your 牛舌, a gentle sweetness from the fat spreads first, followed by the deep, juicy flavor of the lean meat. Because it lacks heavy fat, it has a clean, smooth finish that never causes stomach heaviness.

To maximize 芯芯肉’s flavor, our staff cook it tableside using a technique called “rolling grill” (rolling-yaki), lightly searing the surface to keep it medium-rare. We recommend adding a touch of fresh wasabi and rolling it around hot, freshly cooked white rice for an unforgettable bite.

龟之子: Savoring the Pure, Robust Umami of Beef

龟之子 is located on the outer side of the 芯芯肉 cut. Its name comes from its grain pattern, which resembles a turtle shell (kame no ko). 龟之子 contains very little fat, representing pure, deep red meat. It has a satisfyingly firm texture, and the more you chew, the more it releases rich iron and amino acids accumulated in the muscle. For meat enthusiasts seeking the pure, natural taste of beef without the sweetness of fat, 龟之子 is the ultimate choice.

Because lean meat can dry out and become tough if overcooked, we slice 龟之子 thin and sear it quickly over high 炭火 heat. Our trained staff will grill it to perfection and serve it directly to your plate, ready to be enjoyed with our special soy-based sauce.

Why 黑5’s Fresh, Non-Frozen 和牛 and Professional Grilling Maximize Red Meat Flavor

Compared to fatty cuts, lean red meat is highly sensitive to ingredient quality and cooking skill. To ensure the finest dining experience, 黑5 adheres to three strict principles:

• Commitment to Fresh, Never-Frozen (生) Meat
  When red meat is frozen and thawed, the ice crystals break the muscle cell walls, causing a loss of moisture known as “drip.” This drip carries away the meat’s natural umami. 黑5 uses only fresh, non-frozen 和牛. This ensures the rich juices remain locked inside the muscle fibers, producing an incredibly tender, juicy texture when grilled.
• Meticulous Hand-Trimming by Skilled Chefs
  The round contain various tough tendons and outer membranes. If even a small portion is left behind, it ruins the tender texture of the red meat. Every day, our chefs inspect the meat by hand, trimming away tough fibers with millimeter precision. This careful preparation is key to achieving our signature tenderness.
• Flawless Cooking via “Yaki-Bugyo” Service
  Even the finest raw red meat will become tough and dry if left on the grill for too long. The window for perfect red meat cooking is extremely narrow. Therefore, at every table, our trained staff manage the grill, adjusting the heat of the 纪州备长炭 炭火 to serve each cut at its absolute peak.

Welcoming You Tonight with the Perfect Level of 炭火 Grilling

The red 牛里脊 of Japanese 烧肉 is a testament to the resilience and creativity of chefs during the BSE crisis, matching domestic 和牛 round with the expectations of diners. Beyond the anatomical definition of 牛里脊, this red meat has become a star of the modern 烧肉 table, packed with the fundamental umami of beef.

Enjoy our A5-grade Black 和牛 red 牛里脊, which is gentle on the stomach yet deeply satisfying. Let our staff grill our fresh, hand-trimmed 芯芯肉 and 龟之子 over glowing 纪州备长炭 炭火 right before your eyes. Savor the incredible juiciness that only fresh, never-frozen 和牛 can provide.

Tonight, at our 池袋 Honten, 池袋东口店, and Shinjuku 歌舞伎町店 locations, we have our premium 炭火 fires ready and drinks chilled. Our staff look forward to welcoming you and serving you the perfect bite.

• 炭火 烧肉 黑5 Honten
  Nishi-池袋 Bill 1F, 2-46-3 Nishi-池袋, Toshima-ku, Tokyo / 5 min walk from JR 池袋 Station
• 炭火 烧肉 黑5 Higashiguchi
  Tsukiji Bill 1F, 1-42-16 Higashi-池袋, Toshima-ku, Tokyo / 3 min walk from JR 池袋 Station East Exit
• 炭火 烧肉 黑5 歌舞伎町店
  Sankyo Akagawa Bill 1F, 2-21-4 歌舞伎町店, Shinjuku-ku, Tokyo