Ban Kunkwan is a Thai restaurant in Jongno, Seoul, on the third floor of 20 Jongno 10-gil. Its pu pad pong kari comes with cleaned crab and a smooth, rich sauce, and its tom yum goong is made with shrimp and mussels in a clear broth. The owner is a local and can handle foreign languages, and extra cilantro can be ordered. There were a few customers at opening time.