Kuroge Wagyu is a breed of Wagyu (Japanese beef cattle) and accounts for about 90% of all Wagyu raised in Japan, making it the most representative type of Wagyu. As the name “Kuroge” (black hair) suggests, these cattle have black coats. Japan’s three most famous Wagyu brands—Kobe Beef, Matsusaka Beef, and Omi Beef—all come from Kuroge Wagyu. The defining characteristic of Kuroge Wagyu is its fine marbling, with fat intricately distributed between the muscle fibers. This marbling, often referred to as “sashi,” is what gives the meat its exceptional tenderness and rich flavor. The finer and more evenly distributed the marbling, the higher the quality of the beef. Meat with abundant marbling is called “Shimofuri Niku,” meaning “frosted meat,” as the fat resembles frost settled over the surface. In addition to Kuroge Wagyu, other Wagyu breeds raised in Japan include Akaushi (Brown Wagyu), Japanese Shorthorn, and Mukaku Wagyu (Polled Wagyu).

The sirloin is one of the most popular cuts of beef. It is located in the back of the loin and is characterized by its moderate fat and tenderness. The sirloin is part of the "short loin" and lies between the ribeye and the tenderloin. This cut is especially delicious as a steak, offering a juicy and flavorful taste. There are several theories about the origin of the name "sirloin." One of them is that King Charles II of England named this cut "Sir Loin." Whether this story is true or not is uncertain, but the name "sirloin" has since become widespread. Sirloin is used in various dishes, including grilled meat, steaks, and roast beef. It is particularly popular as a steak, and when cooked properly, its umami can be maximized. To enjoy the texture and flavor of the meat, it is often simply seasoned with salt and pepper. The sirloin is an indispensable cut of beef used in everything from home cooking to high-end restaurants.

The rump is located around the lower back and buttocks of the cow, characterized by tender, lean meat. Only about 4–5 kg can be obtained from one cow, making it a rare cut. It is low in fat and healthy, with concentrated flavor. Commonly used in steak, roast beef, and tataki. It is also suitable for thin slices in dishes like shabu-shabu or barbecue.

Ichibo, known in English as the "Top Sirloin Cap" or "Coulotte," is a highly prized cut of beef from the sirloin primal, specifically from the top part of the sirloin butt. This cut is renowned for its rich flavor, tenderness, and versatility in various culinary applications. Characteristics Ichibo is a triangular-shaped muscle covered by a thick layer of fat on one side, which enhances the meat’s flavor and helps keep it moist during cooking. The meat itself is moderately marbled, offering a perfect balance between lean meat and fat, making it both flavorful and juicy. Flavor and Texture The cut is celebrated for its robust, beefy flavor and tender, juicy texture. The fat cap not only adds depth to the taste but also renders beautifully when cooked, providing a crispy exterior while maintaining a tender interior. This balance makes Ichibo a favorite for grilling, roasting, and pan-searing. Cooking Methods Grilling is one of the most popular methods for preparing Ichibo, particularly in Brazilian barbecue (churrasco). It is often skewered, seasoned simply with coarse salt, and grilled over an open flame, allowing the fat to render and baste the meat, creating a deliciously charred crust. Additionally, it can be roasted whole, cut into steaks, or sliced thin for stir-frying. When roasting, cooking with the fat side up is advisable to allow the fat to melt into the meat, enhancing its flavor and juiciness. Versatility Ichibo's versatility extends beyond traditional barbecue. It can be marinated, cooked sous-vide, or used in stews and braises, making it a standout ingredient in various cuisines. Its rich flavor and tender texture make it a favorite among chefs and home cooks alike, providing a delectable eating experience.