Answer:

Traditional Korean music always comes with three-beats rhythm, which is rare in the other two.There is also a very traditional music called Samul Nori. It literally means playing four instruments.

They are

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Jing

Janggu

Buk

Traditional Chinese music has a unique five-note scale, using 1, 2, 3, 5 and 6, while traditional Japanese music uses the "1-3-4-6-7" scale.

If you compare the Chinese ballad "Jasmine.don't know the corresponding name in English. Please fill me in if you do,thanks.),a vocal music used in Buddhist ceremonies.

-Pipa music,popularized after Senji. Flower" and the Japanese "Sakura( cherry blossoms)", you can easily figure out the difference between the scales they take.

The traditional music in Japan is called Hogaku and there are categories(generally based on the instrument types.