Born in 1986 in Seoul, South Korea, Yang received her first piano lesson from her aunt at the age of four. She quickly took to the instrument, which she received as a birthday present. Over the next few years won several national piano competitions in her native country. By the age of ten, she had entered the School of Music at the Korea National University of Arts, and went on to make a number of concerto and recital appearances in Seoul and Daejeon. In 1997, Yang moved to the United States to begin studies at the pre-college division of the Juilliard School with Dr. Yoheved Kaplinsky. During her first year at Juilliard, Yangwon the pre-college division Concerto Competition, resulting in a performance of Haydn’s Keyboard Concerto in D with the Juilliard Pre-College Chamber Orchestra. After winning the Philadelphia Orchestra’s Greenfield Student Competition, she performed Prokofiev’s Third Piano Concerto with that orchestra at just twelve years old. She graduated from Juilliard with special honor as the recipient of the school’s 2010 Arthur Rubinstein Prize
She first came to international attention in 2005 when she won the silver medal at the 12th Van Cliburn International Piano Competition. The youngest contestant at 19 years old, she took home two additional awards: Best Performance of Chamber Music (with the Takàcs Quartet), and Best Performance of a New Work. In 2006 Yang made her celebrated New York Philharmonic debut alongside Lorin Maazel at Avery Fisher Hall along with the orchestra’s tour of Asia, making a triumphant return to her hometown of Seoul, South Korea. Yang’s subsequent appearances with the New York Philharmonic have included opening night of the 2008 Leonard Bernstein Festival – an appearance made at the request of Maazel in his final season as music director.