Seongsu Japanese restaurant lunch with tonkatsu and udon: Kosi
Kosi Seongsu Branch is a Japanese restaurant in Seongdong, Seoul, serving tonkatsu and udon set meals. My husband added udon to a half-and-half katsu set, while I added tonkatsu to a bukkake udon set and we shared a sweet potato cheese croquette. Verdict: a satisfying lunch when you both want different mains.