Why are the traditional court music styles in Japan and Korea similar?

1. Historically, there have been long-term cultural exchanges and mutual influences between Japan and South Korea. In ancient times, the rulers of Korea and Japan kept close contact, which led to the exchange and influence of music and other art forms between the two countries.

2. Both Japanese and Koreans are influenced by China's court music. China's ancient court music had an important influence on Japanese and Korean music, especially in musical instrument making, musical theory and playing skills. Japanese gagaku and Korean court music both adopt similar scale systems, instrument combinations and playing methods.