Jamsugyo-jip Seongsu (잠수교집성수)

Jamsugyo-jip is famous for popularizing naengsam — thinly sliced, flash-frozen pork belly grilled tableside until perfectly crispy. The freezing creates a uniquely tender texture different from fresh samgyeopsal. Paired with a raw egg and green onion dipping sauce (similar to Japanese sukiyaki style) and the restaurant's standout cheonggukjang (extra-strong fermented soybean stew). Open until 5 AM. Recommended as the only place in Seongsu to try naengsam, with late-night hours ideal after an evening out.