Katsushosin Euljiro Ferrum Tower Branch is a Japanese-style tonkatsu restaurant on the second basement level of Ferrum Tower in Euljiro, Seoul. Its signature dishes are hire katsu and rosu katsu, with meat cooked until tender and moist. The dining area is clean and orderly, and the katsu is crisp outside and moist inside. If you arrive after the 11 a.m. opening, expect a wait of 20 to 30 minutes.