Originally, the shakuhachi was exclusively owned by "komuso" (a mendicant Zen priest of the Fuke sect), and its performance was deemed part of religious activities instead of entertainment, but in the middle of the Edo period Kinko KUROSAWA changed it from an instrument for religious music to one for secular music.
尺八は本来虚無僧の占有楽器であり、娯楽よりは宗教行為のひとつとして演奏されてきたが、江戸時代中期に黒沢琴古が出て、宗教音楽から世俗音楽への道が開かれた。