Seongsu restaurant for tonkatsu and cold udon: Kosi
Kosi Seongsu Branch is a Japanese restaurant in Seongdong, Seoul, near Ttukseom Station. I ordered tempura bukkake udon, half-and-half katsu, shrimp tempura, and lotus root kushikatsu for a satisfying mix of cold noodles and crisp fried dishes. Kosi Seongsu Branch is a great stop for a hearty Seongsu date meal.