From wiki:

Yiruma is the stage name of I Ru-ma (born February 15, 1978), is a popular internationally known pianist and composer from South Korea. The name "Yiruma" means "accomplishment" in Korean.

Yiruma's piano music is expressive and introspective. He frequently performs at sold-out concerts in Asia, Europe and North America. His Alma Mater King's College in England helped him gain European popularity and recognition. Several of his most popular pieces include, "River Flows in You", "Kiss the Rain", and "Maybe". His most popular album "First Love" was released in 2001.

He began playing the piano at the age of five, and moved to London when he was 11, in 1988, to study at The Purcell School of Music . He possessed dual citizenship of South Korea and England until 2006. In 2006, he gave up his UK citizenship to serve in the Navy of South Korea.

http://www.youtube.com/watch?v=rhN7SG-H-3k