Shimofuri, the snow in the meat
霜降り · The marbling grade that defines A5 Wagyu.
Shimofuri literally means "frost fall." It's the Japanese word to describe Wagyu marbling: those fine white veins of fat that run through the red meat like lace. The denser the shimofuri, the more the meat melts in your mouth. It's what defines the A5 grade.
Marbling is measured on a BMS (Beef Marbling Score) scale from 1 to 12. To reach A5 grade, the meat must be at least BMS 8. The finest cuts reach BMS 11-12, where the meat contains more fat than muscle.
This marbling is not by chance. It's the result of 30 months of rearing, a diet based on rice straw and fermented grains, and virtual immobility in temperate stables. The animal grows slowly, accumulates intramuscular fat, and develops shimofuri.
The origin
A5 Wagyu comes from four Japanese breeds: Kuroge (black, 90% of production), Akage (brown), Mukaku (polled), and Nihon Tankaku (short horn). All are registered in the national registry, traceable with a birth certificate.
The producing regions are Kobe, Matsusaka, Omi, Kagoshima, Miyazaki. Each region has its genetics, its diet, its terroir. A Kobe is more marbled, a Miyazaki more fragrant, a Kagoshima more structured.
The use
Shimofuri Wagyu is eaten in small portions. 50 to 80 grams per person is enough. Seared quickly (30 seconds per side), lightly salted, placed on warm rice: this is Wagyu sushi, a Tokyo classic.
To avoid: long cooking, marinating, sauce. Shimofuri is so rich that it is sufficient on its own. A touch of fresh wasabi, a grain of fleur de sel, that's all it needs.
Tasting notes
Appearance: Light red, almost pink, traversed by delicate white veins.
Nose: Melted butter, hazelnut, aged meat. No animal notes.
Palate: Immediate melt-in-your-mouth. The fat dissolves at 27°C, no chewing required.
Finish: Long, fatty, buttery. Full sensation. No aftertaste.
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