Osai Sushi serves sushi omakase near Children's Grand Park in Kondae, Seoul. The sushi course includes soy-marinated shrimp and ankimo gunkan, prepared in front of diners with the chef's explanations. Weekday lunch runs at three seatings: noon, 1 pm, and 2 pm, and reservations can be made through Naver Booking even the day before. Each seating lasts about 30 minutes, so the meal is short.