Han left South Korea on June 1, 1954. Han had performed with many of the finest orchestras around the world, among them the New York Philharmonic, Chicago Symphony, Los Angeles Philharmonic, Cleveland Orchestra, Detroit Symphony, London Philharmonic, Royal Philharmonic, Scottish National Orchestra, Oslo Philharmonic, Monte Carlo Orchestra, Rotterdam Philharmonic, Polish Radio National Orchestra, Budapest Radio Symphony Orchestra, and Russian National Symphony, among many others. The conductors with whom he had collaborated include
Bernard Haitink,
Herbert Blomstedt,
Edo de Waart,
Rafael Frühbeck de Burgos,
Charles Dutoit,
Lukas Foss,
Eugen Jochum,
Raymond Leppard,
Robert Shaw,
Stanisław Skrowaczewski, and
David Zinman. Since his return to South Korea, Han had performed throughout his homeland as a soloist performing with numerous orchestras, among them
KBS Symphony Orchestra,
Seoul Philharmonic Orchestra, and
Daegu Philaharmonic Orchestra. As a distinguished chamber musician, Han participated in the Seoul Spring Festival, as well as collaborated with highly accomplished young musicians. Han's several recordings include Chopin's Twenty-Four Preludes, Four Ballades and Four Scherzos, eight Sonatas by Beethoven (including the last five), Sonatas by Schubert and Brahms, and a group of shorter piano works under the title "Music I Love To Play". He also has recorded Sonatas for Cello and Piano by Brahms, and Schumann's Fantasy Pieces with cellist Leslie Parnas. The CD titled "The Kennedy White House Concert" (the live concert given at the White House) has been released. In this concert recording Han performed Debussy's "Reflet dans l'eau" and electrifying performance of the Liszt's "Mephisto Waltz". His latest CD released in June 2004 was recorded in Rome. This includes major works by Schumann, Beethoven, and Brahms. ==Academic career==