Katsujen Seolleung is a Japanese tonkatsu restaurant in the Seolleung area of Seoul that serves tonkatsu with soba sets. It offers sweet potato cheese tonkatsu, cold soba sets, and plate soba sets, and the tonkatsu is cut before it is served. At around noon there was a seven-minute wait for lunch, and orders and payment are both handled through a tablet at the table. The soba is ordinary in taste.