The Buddhistic broadcast has broadcasted this very nice interview with Tilo Burdach, which was done at the European shakuhachi summerschool. Tilo tells about his finding of the shakuhachi or Kyotaku and his learning from Koku Nishimura. Also a song from Koku Nishimura can be heared. Tilo tells as well about the specific aspects of the Kyotaku.You can give it a listen
here or visit the Buddhistic internet page
here.