Somunan Sagol Son Kalguksu is a kalguksu restaurant in Sangbong-dong, Seoul, that has served sagol kalguksu and kal mandu for over ten years. The broth is made from sagol thick enough to carry a distinct aroma, and the noodles are kneaded in-house and served chewy, with kimchi and kimchi mandu on the side. The restaurant opens at 10:30 a.m., but food can take about 30 minutes to arrive because of preparation, and office workers nearby fill the place at weekday lunch. Sujebi is unavailable on many days.