Committed to serving only A5 rank, BMS No, 10 Wagyu Black Beef At Han no Daidokoro, we place more importance on taste than on brand name and strive to deliver only the best tasting meat. BMS stands for Beer Marbling Standard, This is classified from No. 12 (top level) to No. 1 (bottom level) based on how much marbling is in the lean meat. Minimum requirements for obtaining on A5 ranking. A great balance carefully selected bt our meat experts. The highest rank conversely has a lot of fat