Greystone The Steakhouse is San Diego’s only restaurant with a government-issued Certificate of Authenticity for 100% Japanese A5 Wagyu. Located in the Gaslamp Quarter’s historic 1874 building on Fifth Avenue, Greystone serves certified A5 alongside its prime dry-aged beef program and a sommelier-managed wine cellar. This guide covers what A5 Wagyu actually means, how it compares to USDA Prime, and how to order it.







