Tonkatsu Jun is a Japanese tonkatsu restaurant near Gongdeok Station Exit 6 in Mapo-gu, Seoul, serving aged pork as teukrosukatsu, hirekatsu, and menchi cheese katsu. The meat and breading are tender, and the katsu is eaten with a sauce mixed from apple, honey, and vinegar and with salt that changes monthly. Each table has instructions for eating tonkatsu, truffle oil can be requested for dine-in, and menchi cheese katsu is sold in limited quantities on Saturdays. Food takes time to arrive after ordering and the dining room has few seats, so a wait forms at lunch.