Jojo The Hyundai Seoul is an Osaka-style teppanyaki restaurant in The Hyundai Seoul in Yeouido, Seoul, serving okonomiyaki, yakisoba, and mentaiko gyoza. The okonomiyaki and yakisoba are grilled to order on the teppan, and the mentaiko gyoza is crisp outside and moist inside. The open kitchen lets diners watch the cooking, and on weekday lunchtimes an order takes about 20 minutes to reach the table. Wait times can run long during meal hours.