Hwayang Sundaeguk Gamjatang is a gukbap restaurant in Hwayang-dong, Seoul, serving sundae-guk, with bone hangover soup as a representative dish. The broth is light and clean, with plenty of naejang and gopchang. The restaurant has customers who have been coming since their school days. Takeout portions are large, and the soup contains more naejang than sundae.