Subukdong by Yun Gyeong Yangsikdang is a Japanese-style diner near Seoul Forest in Seongdong-gu, Seoul, serving donkatsu, chalbori naengmyeon, and chicken burgers. The signature combination pairs a thick, crisp donkatsu with savory chalbori naengmyeon. The chalbori naengmyeon is a summer menu item, available either as deulgireum bibim naengmyeon or as mul naengmyeon. At lunch and on weekend meal times, there can be a wait.