Anseong Ttosuni is a saengtae-tang restaurant in Gwanghwamun, Seoul. Saengtae-tang and donggeurangttaeng are its signature dishes, and it serves cod soup when saengtae is unavailable. It opened in 1979 and moved through Jeong-dong and Cheongjin-dong before settling at its current location, and takeout is available. The saengdae-gu-tang is too much for one person to eat alone.