Kai 9 is a restaurant on the second floor of 6 Chungmuro 5-gil, Jung-gu, Seoul, in Euljiro. It serves Thai food including rang chat, jokbal deopbap, and stir-fried morning glory, presented in a Thai street food style. A Thai wife and Korean husband run the restaurant, using traditional recipes learned from the wife's Thai mother. The pad thai is strongly sweet and salty.