 The classical structures of Most Japanese music originates in China and was not concerned with developing a universal scale or mode until Western music had been imported.After the Heian period began was when Western modal theories became widely acknowledged by Japanese society, though it often stayed in its own category as it could not entirely explain Japanese music across all its different iterations.The most common version of the Japanese mode is a somewhat inaccurate term for a pentatonic musical scale which is used commonly in traditional Japanese music.