Kokû (Don't know which version) appears on the following albums

	Album	Artist
	Calligraphy	Shakuhachi : Vlastislav Matousek
	Chikusei	Shakuhachi : Matsumoto Kyozan Shakuhachi : Takahashi Kyohaku
	Fuke Shu Honkyoku; Kyotaku	Shakuhachi : Nishimura Koku
	Heart of Bamboo, The	Shakuhachi : Ronnie Nyogetsu Reishin Seldin
	Ichi on Buttsu - One sound Enlightenment	Shakuhachi : Ronnie Nyogetsu Reishin Seldin
Koku, or "Bell ringing in the Empty Sky," is one of the three oldest honkyoku (San-Koten). It is said to have been composed after death of the Zen monk Fuke-Zenji, patriarch of the shakuhachi, who in life is supposed to have walked around ringing a small hand-bell. In the legend the monk predicts the day of his own death. When the villagers hear of his death, they open his coffin and find it empty. However, they look to the sky and clearly hear the sound of a bell getting fainter, as if ascending to the clear, blue sky. The music of Koku ("empty sky") supposedly represents this event.
	Koku	Shakuhachi : Monden Tekikū
	Shakuhachi - Classical Modern Best 30 - 01	Shakuhachi : Okamoto Chikugai
	Shakuhachi - Ryudo - 01	Shakuhachi : Takahashi Ryudo
	Shakuhachi Tokusen	Shakuhachi : Aoki Reibo II
	Sound of Zen, The	Shakuhachi : Okuda Atsuya
	Souvenir of Japan - Shakuhachi Komusoh and Suizen	Shakuhachi : Unkown Fuke-shū players
	Take no Shirabe; Fuke Shu Honkyoku	Shakuhachi : Yes Yes