fundamental tone in traditional Japanese 12-tone scale (approx. D)
Technical term in gagaku and traditional music theory; corresponds to the first note of the 十二律 (jūniritsu) system, roughly equivalent to D in Western music.
See also: 黄鐘 (こうしょう) · 十二律
In gagaku, the fundamental tone 壱越 is used as the reference pitch for tuning.
ichikotsu mode (gagaku)
The term originates from Chinese music theory and was adopted into Japanese gagaku. The exact derivation of the name is uncertain, but it has been used historically to denote the fundamental pitch of the scale.