Katsumonster Gangdong-gu Office is a restaurant in an alley near Gangdong-gu Office Station that serves thick Japanese-style tonkatsu. It offers rosu katsu, hire katsu, cheese katsu, and kimchi cheese nabe donkatsu, all fried to order so the outside is crisp and the inside stays moist. Seating is centered on a bar table, which makes it convenient for eating alone, and rice and soup can be refilled. The space is small, so seats are limited.