Donggyeong Udon Gwanghwamun

Tokyo Udon Gwanghwamun is an old Japanese restaurant near Gwanghwamun Station serving udon, tonkatsu, soba, and inari sushi. Its udon comes with a mild broth and chewy noodles, and the tonkatsu is fried to order. Breakfast is available and food comes out quickly. A line forms at lunchtime, so sitting down right away is difficult.