Jojo Kalguksu Seongsu Branch is a noodle shop in Seongsu, near Seongsu Station, serving dongjuk kalguksu and nakji haemul pajeon. The clear, cool broth is made with dongjuk and clams, and the chewy noodles come with scallions, minari, and cheongyang chili peppers. There is a wait at weekend lunch, but the dining room is large and the tables are spaced well apart. The portions of kalguksu and pajeon are on the small side.