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Which regions influenced the music included in komagaku?
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Japanese music
Courtesan playing a samisen, Japanese woodcut print.
In the context of Japanese court music, or gagaku, the repertoire known as komagaku—often referred to as the "music of the right"—was organized in the 9th century to encompass a variety of foreign influences.
Specifically, komagaku includes music originating from Korea as well as examples from Manchuria. While tōgaku (the music of the left) focused on traditions derived from China and India, komagaku served as the category for Korean and other northern Asian forms. Over time, these categories also incorporated Japanese arrangements and original compositions.12