Ilmi Sikdang is an old Korean restaurant in the basement of Nakwon Sangga in Jongno, Seoul, serving cheonggukjang, jeyuk bokkeum, and baekban. The cheonggukjang is seasoned without additives and not made salty, and it is eaten with freshly cooked rice, kimchi, and side dishes. The restaurant was featured on Su Mi Sik Hoe and as the first "kind restaurant" on Food X-File, and celebrity signatures are visible inside. The mild seasoning of the cheonggukjang is bland for people who eat salty food.