Time Out says
Bangbae 24 Udon Jajang is, just as it name suggests, a restaurant in Bangbae-dong open 24 hours serving udon and jajangmyeon. You can choose between the udon, jajangmyeon and jajangbap. The udon, while a far cry from its original Japanese flavor, is topped with seaweed, fried bean curds and leeks making it more special than other cheap udons in the city. The noodles are thinner than udon noodles normally are, but they’re fresh and chewy.
3, Seocho-daero 8-gil
|Transport:||Isu Station (line 4,7) exit 5|
|Price:||Udon 3,000 won.|