Gwangjin Japanese restaurant for gyudon with udon: Kosi
Kosi Konkuk University Branch is a Japanese restaurant near Konkuk University Station in Gwangjin, Seoul. I ordered half-and-half tonkatsu, mild gyudon with udon for an extra ₩3,000, and tempura; everything was generous and neatly prepared. Verdict: a satisfying choice for groups with different tastes.