Hongje-dong Udong Guksu is an udon noodle shop on the road to Seooreung at the far end of Hongje-dong, serving sundubu udon, eomuk udon, and buchu udon. The noodles are thinner and chewier than standard udon and come in a rich broth, and the sundubu udon is red but not spicy. It stays open until 2 a.m., so customers keep coming in late, and a wait can form depending on timing. Parking space is limited, making it inconvenient to reach by car.