Gyokku Sushi is a sushi restaurant in Yonggang-dong, Mapo-gu, Seoul, a five-minute walk from Mapo Station Exit 2. The recommended sushi set comes with twelve pieces, including tuna, flounder, salmon, seared engawa, and eel, plus salad, soup, chawanmushi, and udon. The Lunch Set 2 comes with six pieces of sushi, hoe-deopbap, and mini udon, and the udon contains scorched rice. At lunch the seats fill up, so a reservation is required.