Yes, this is real. "All-You-Can-Eat" A5 Wagyu Teppanyaki. It sounds like a tourist trap, but the quality is shockingly consistent. You pay a fixed price (around ¥10,000-¥15,000) and chefs grill A5 steaks right in front of you until you beg them to stop. The Shibuya branch offers a nicer view than the Ginza basement one.