F1 Wagyu

First-generation wagyu crossbreed, typically 50% wagyu and 50% Angus.

F1 cattle are the most common "American Wagyu" — one wagyu parent (usually bull) crossed with one Angus parent. This dilutes marbling genetics but increases growth rate and yield. F1 can achieve good marbling (BMS 4-6) but cannot reach A5 levels.

Related Terms

A5

The highest grade in the Japanese beef grading system, indicating top yield (A) and quality (5).

BMS (Beef Marbling Score)

A 1-12 scale measuring intramuscular fat distribution in beef.

Fullblood Wagyu

100% genetically pure wagyu cattle with traceable Japanese lineage.

Japanese Black (Kuroge Washu)

The primary wagyu breed, representing 90%+ of Japanese wagyu production.