J-Platz is a mixed-use commercial building with offices, restaurants, and cafes, located directly in front of Exit 7 of Gasan Digital Complex Station. Restaurants and cafes occupy the basement level through the second floor, and the building is accessible via Line 1 and Line 7. At Sunnam Si-raegi on the basement level, diners can order the 3-dae si-raegi guk and doma suyuk jeongsik. Obstetrics and gynecology, orthopedics, dermatology, and family medicine clinics are on the upper floors, and the lobby has seating for waiting.