Katatsumuri is a small udon shop in an alley running from Myongji University toward Chungam High School in Seodaemun-gu, Seoul. It serves kake udon and bukkake udon along with yuzu udon and kamatama udon, and you choose whether the noodles and broth come cold or warm. A Japanese chef makes the noodles by hand, and when seats fill up a numbered order slip is handed out first so orders are taken in advance. The space is small, so there is often a wait.