Ryusenso Songdo is a Japanese restaurant in Songdo, Incheon that serves tonkotsu and shoyu ramen. Chashu can be added one thin slice at a time, and the broth is less salty than other Japanese ramen. The interior is clean, and in winter gul ramen and tori karaage are also on the menu. For adults, the noodles and the overall portion are on the small side.