Japan — Japanese cattle breeding for food use was prohibited by imperial decree from 675 CE to 1872 CE, with exceptions for agricultural draught animals. The reopening of beef eating under the Meiji government (1872) catalysed rapid development of the existing cattle breeds into the fat-marbled wagyu tradition. The Tajima cattle line that produces Kobe beef and Matsusaka beef was identified as genetically distinct in the early 20th century.
While Kobe beef (神戸ビーフ) is the internationally famous Japanese wagyu, Japan has at least five premium regional wagyu designations of equivalent or greater quality among Japanese connoisseurs: Matsusaka (松阪牛, Mie Prefecture) — considered by many Japanese chefs the finest for eating raw (sukiyaki) due to its extraordinary fat marbling; Omi (近江牛, Shiga Prefecture) — Japan's oldest continuously branded beef, prized for its clean, subtle flavour; Hida (飛騨牛, Gifu Prefecture) — mountain-raised beef with a delicate fat character; Miyazaki (宮崎牛, Miyazaki Prefecture, Kyushu) — awarded top prize at Japan's national wagyu competition (Wagyu Olympics) in 2007, 2012, and 2017; and Yonezawa (米沢牛, Yamagata Prefecture) — one of Japan's 'three great beefs' alongside Kobe and Matsusaka. Each regional designation has specific certification requirements and a distinct flavour character from terroir, breed, and feeding practices.
The regional wagyu flavour differences are subtle but perceptible to an experienced palate: Matsusaka beef's fat has a distinctly sweet, almost floral quality — the oleic acid content produces a fat that dissolves on the tongue leaving a clean, sweet aftertaste rather than the heavier coating of less refined fat. Omi beef has a more delicate flavour, slightly less intensely marbled but with a cleaner, more traditional beef character. Miyazaki beef has a robust marbling with a characteristic richness that performs excellently across multiple preparation styles — the reason it performs well in international competitions.
Japanese wagyu certification requires 100% Wagyu genetics (primarily Japanese Black, Kuroge Washu, ホルスタイン-クロゲワシュウ), born and raised in the designated prefecture, and meeting minimum BMS (Beef Marbling Standard) scores. Grading: Japanese beef uses the AUS-MEAT-comparable system of Yield Grade (A, B, C) and Quality Grade (1–5), producing a grid from A1 to A5. A5 is the highest grade. BMS (Beef Marbling Standard) rates intramuscular fat from 1–12; BMS 8–12 is the premium category. The marbling in BMS 10–12 beef is so dense that the meat appears pink rather than red — the intramuscular fat has overtaken the lean muscle tissue in visual dominance.
The Japanese preference for Matsusaka over Kobe for sukiyaki is based on Matsusaka's higher ratio of oleic acid in its fat — the fat melts at a lower temperature and has a sweeter, more refined flavour than Kobe when eaten with raw egg dip. For western cooking contexts: A5 Miyazaki is the most accessible premium regional wagyu (available internationally at lower cost than Kobe due to Japan's export marketing) and represents exceptional value for the quality tier. Serving thick-cut wagyu sashimi (raw A5 beef, sliced 5mm) with ponzu and negi is a Japanese technique that showcases the fat's cold flavour — cold fat in the mouth renders as the beef warms, releasing a flow of sweet, buttery richness from a seemingly solid piece.
Treating all A5 wagyu as equivalent — the regional differences between A5 Kobe, A5 Matsusaka, and A5 Miyazaki are significant and meaningful. Over-seasoning wagyu — at BMS 10+, the fat's sweetness is the primary flavour; added seasoning should be minimal (fleur de sel, Japanese mustard, wasabi — no complex sauces). High-heat cooking — wagyu's low-melting-point fat (the intramuscular fat of Japanese Black cattle melts at 25°C, near body temperature) means it over-renders at high heat; medium-rare at lower temperatures preserves the fat's character.
The Japanese Farm Food — Nancy Singleton Hachisu; Wagyu: The World's Most Prized Beef — Patrick Martins