Kotako Seongsu is a fusion restaurant near Seongsu Station that serves Korean-style sushi tacos made with gim bugak. Instead of tortillas, it uses crisp gim bugak shells topped with Sindongjin rice and ingredients such as salmon, yukhoe, uni, and eel, served in one-bite pieces. The space has bar seating, an open kitchen, a hand-washing sink, and dedicated single-person packages. Topping combinations differ by menu item, such as salmon kotako and eel kotako.