Okonomiyaki AT THE 21 Namba is a restaurant near Kuromon Market that serves seafood okonomiyaki and yakisoba. The okonomiyaki comes with shrimp, scallops, and enoki mushrooms, and the yakisoba uses thin noodles, both served on a small iron griddle. Orders are placed by scanning a QR code, and staff take photos of guests when the food arrives. After ordering, food takes 30 to 40 minutes to come out.