Katsu Di Nine is a small restaurant in a Jeju Pyoseon alley that serves donkatsu and fish katsu. The menu also includes fish katsu, modum katsu, cheese katsu, and a spicy donkatsu set meal, along with memil soba set meals and udon. The donkatsu is juicy and comes out warm. The donkatsu is dry, and the modum katsu smells of oil.