Sushi Maiu Kitchen Posco is a casual Japanese restaurant in the underground dining area of the Posco building in Daechi-dong, Gangnam-gu, Seoul. It serves sushi as its main offering, and orders can be made as a set meal with portions large enough to fill you up. The setup suits a simple lunch, and the sushi is available inside the Posco building. The sushi pieces are about two-thirds the usual size, which may not be enough for men.