Wonder if you guys heard this song before... sung by SunMin.
http://www.youtube.com/watch?v=wMJYtW2YHQ0&feature=related
It's the music theme for Sinking of Japan (2006), which starred Kou Shibasaki, Tsuyoshi Kusanagi, Mayuko Fukuda, Mao Daichi and Etsushi Toyokawa. The movie is quite nice, and the entire movie itself can be found in YouTube.