Seonju Sikdang is a janchi guksu restaurant inside Seonju Apartments in Dongcheon-dong, Gyeongju. It serves spicy janchi guksu in a rich anchovy broth, and the noodles are boiled when a customer arrives. On entering, the number of orders is placed automatically to match the number of people, and the level of spiciness can be adjusted. As of December 2024, buchu jeon is not served.