Asosan Genan serves Japanese soba, udon, and tonkatsu on the second floor of a building across from the back door of Kyobo Tower at Gangnam Station. Its signature cold udon comes with sweet-and-sour broth and toppings, and the buckwheat noodles are made fresh each day. The restaurant has continued for about twenty years since its days in the back alleys behind CGV at Gangnam Station, and orders and payment are made at a kiosk or tablet at the table. Noodle portions are smaller than at typical restaurants.