also: いちこちちょう
noun
ichikotsu mode (gagaku)
One of the six main modes of gagaku (Japanese court music). See also 六調子.
See also: 六調子
雅楽では、壱越調は春の調子とされることがある。
In gagaku, the ichikotsu mode is sometimes considered a spring mode.
六調子 refers to the set of six main gagaku modes, of which 壱越調 is one.
The name 壱越調 is derived from the Chinese musical mode system. The exact historical derivation is uncertain, but it is one of the traditional gagaku mode names.