Gupja is a small grilled fish restaurant in Sinwol-dong that serves grilled mackerel and Spanish mackerel. The fish is grilled over a wood-fired oven and comes with charsol rice, including the scorched rice at the bottom of the pot. About ten minutes after ordering, the grilled fish, pot rice, thin doenjang soup, and four side dishes arrive together. When the restaurant is busy, the tables are close together and it is uncomfortable.