While some might be skeptical of Costco offering the high-end Japanese A5 Wagyu, the grocery store actually has the real deal, imported straight from Japan.
The "A" refers to the yield grade, while the "5" is the highest score on Japan's strict beef grading scale, which evaluates color, marbling, and texture.
Costco's A5 Wagyu hails from Kagoshima, a southern region renowned for producing some of Japan's finest beef. While the $156.66 per pound cost seems high, this is a great deal.