The potential for Han Ak (Korean music, 韓樂) therapy based on the five phases (五行) theory. (Korean traditional music therapy)

Music therapy is a treatment for a range of disorders (physical, emotional, mental, and social) by using music. This article introduces traditional medical books, which mentioned relation between sounds and emotions or internal organs based on the five phases (五行) theory. And, authors provide the Korean traditional musical instruments related with five phases and Six Healing Sounds (六字訣).