“Arguments about the body-mind or the controller versus the controlled are mostly carried out by using two words “choreography” and “improvisation”. But these
words are totally inadequate because the decision making or objectifying subject is
totally blurred in the peculiar state of consciousness of Butoh as an embodied primary
process.” Toshiharu Kasai

Interesting read on some concepts of the body-mind exploration of Butoh training: Publication by Toshiharu Kasai