Tsukuba Sanroku Iimura Beef, a high-quality black Wagyu, is known for its fine texture and rich fat, produced in the natural environment at the base of Mount Tsukuba. The cattle are raised in clean barns with ionizing tourmaline fans, fed with a special blend of barley, bran, soybeans, and domestic rice straw, and are free from animal-based feed and growth hormones.