Son Ye Jin's "Moment to Remember" aka "Eraser in my head" became Japan most popular korean movie with a box office of 30 billion yen.
The second is "April Snow" also staring Son Yejin with 27.5 billion yen box office.
Third is "Windstruck" staring Jun Ji-hyun and Jang Hyuk (20 billion yen). While SHIRI and Taegukgi are the fourth and fifth most popular korean film.