The East Asian Music Department includes the Han nationality and most ethnic minorities in China, as well as countries and regions such as the Korean Peninsula, the Japanese archipelago, Mongolia, Viet Nam and Indonesia.

The East Asian Music Department has the following characteristics in music form:

Music cavity can also be called sound cavity, or "sound cavity", which refers to some changes of sound components (pitch, intensity, timbre) that are intentionally used by a single tone in the process and reflect the expression intention of special music.

This tone cavity phenomenon is very prominent and typical in the traditional music of Han nationality, Korean peninsula and Japanese archipelago, and can also be clearly felt in the traditional music of Miao, Dai, Tibetan and Yi people.