Geza ongaku is also called 'kuromisu' (black bamboo screen) music because the performer plays while hidden behind a black bamboo screen called a 'kuromisu' from where he peeks at the actions of the actors on the stage while playing.
この「下座音楽」の演奏者は「黒御簾」(くろみす)という黒いスダレの後ろに隠れ、舞台の役者の様子を覗いながら演奏するので「黒御簾音楽」とも呼ばれる。