Japanese Wagyu grades: A5, A4, A3 and the BMS scale.
What an 'A5 Japanese Wagyu' label actually certifies — the yield grade, the meat-quality score, and the 12-point marbling standard behind it — and what that means when you source by grade.
A5 to A3: yield grade × meat-quality score.
A Japanese grade is a letter and a number. The letter (A–C) is the yield grade — how much saleable meat the carcass yields. The number (1–5) is the meat-quality score, and it is capped by the lowest of its four factors: marbling, colour, firmness, and fat quality.
A yield · quality 5
Top yield grade with the highest meat-quality score. The grade most overseas buyers ask for by name; availability is the tightest and the most price-sensitive.
BMS 8–12A yield · quality 4
Top yield grade, second-highest quality. Often the most workable balance of marbling, availability and cost for a foodservice programme.
BMS 5–7A yield · quality 3
Top yield grade, mid quality. A leaner profile used where consistent availability and cost matter more than maximum marbling.
BMS 3–4BMS 1–12: the 12-point marbling scale.
Marbling is scored on the Beef Marbling Standard (BMS), No. 1 to No. 12. BMS is one of the four factors behind the quality number — and the reason a single 'A5' still spans a wide range of marbling, up to the BMS 12 ceiling.
Graded, identified, and certified.
Behind a grade sits a chain of verification — who graded the carcass, which animal it came from, and where that animal was raised.
JMGA grading
Grades are assigned by the Japan Meat Grading Association (JMGA), a third party independent of the seller, applying one national standard to the yield grade and the four meat-quality factors. The grade on the certificate is the JMGA grade, not a marketing claim.
Individual identification number
Every animal carries a 10-digit individual identification number that ties the carcass to a single animal and its records, traceable through Japan's cattle traceability system. It lets a specific lot be verified, rather than a brand name in the abstract.
Origin & breed certification
'Japanese Wagyu' is defined by breed and by birth and raising in Japan. Authentic export lots travel with documentation of breed, farm of origin and prefecture — the line between Japanese Wagyu and Wagyu-genetics cattle raised elsewhere.
Why 'Wagyu' is not one grade.
Australian and US 'Wagyu' use different scales, different grading bodies and often different genetics. Reading an A5 against an overseas marble score is not a like-for-like comparison.
- Grading body
- Japan: JMGA, one national standard. Australia: AUS-MEAT / MSA marble score. US: USDA Prime plus private Wagyu scales.
- Marbling scale
- Japan: BMS 1–12. Australia: marble score 0–9+. US: USDA Prime sits well below Japanese A5 marbling.
- Genetics
- Japan: Japanese breeds (e.g. Japanese Black), born and raised in Japan. Overseas: often crossbred or full-blood Wagyu raised outside Japan.
- What 'A5' means
- A5 is a Japanese JMGA grade. Overseas Wagyu cannot carry a JMGA A5 grade — a similar-looking score is a different scale, not the same certificate.
Discuss grade and availability.
Tell us the grade, cut and volume you are working to — our Japan-side supply team replies with what is workable.