Omakase Osai Sushi Gangnam Station serves Japanese-style sushi omakase in Gangnam, Seoul. The meal starts with a few slices of sashimi, then courses made from that day's ingredients arrive in order, and diners can watch the sushi being made. Dinner can be reserved through Naver Booking, and the meal lasts about one hour with a drink order required. Portions are small, so diners tend not to feel full when the meal ends.