Yongsan Maru is a fusion Japanese restaurant in the Yongsan food alley, serving gopdori-tang, maze-soba and memil gimbap. The gopdori-tang comes as a sweet-and-spicy broth with daechang (beef large intestine), chicken and mushrooms. The restaurant runs a main building and an annex, and when the main building is full, guests are directed to the annex or to Katsumansion across the way. The space is on the small side for eating tang dishes.