12th note of the ancient chromatic scale (approx. C♯)
Technical term from traditional Japanese music theory, corresponding to the twelfth pitch of the ancient chromatic scale (十二律). Used in historical or musicological contexts.
Kamimu is the twelfth note of the twelve-tone scale, said to be close to C sharp in Western music.
The term originates from the ancient Chinese-derived twelve-tone system (十二律) adopted in Japan. The exact derivation of the name 上無 is uncertain; it is a conventional label within that musical framework.