Asosan is a restaurant in Yeongdong Plaza near Gangnam Station in Seocho-gu, Seoul, serving Japanese snack-style dishes such as cold udon, tonkatsu, and ilbap. The cold udon, its signature dish, comes with a tonkatsu set or can be ordered alongside single-piece tonkatsu, and Nagasaki champong is also on the menu. The Gangnam Station branch closed and later reopened near Yeongdong Plaza. Dishes other than the cold udon are made above a basic level.