Fuke Zen

Fuke-shū (Japanese: 普化宗, Fuke sect^?) or Fuke Zen was a distinct and ephemeral derivative school of Japanese Zen Buddhism which originated as an offshoot of the Rinzai school during the nation's feudal era, lasting from the 13th century until the late 19th century. The sect, or sub-sect, traced its philosophical roots to the eccentric Zen master Puhua, as well as similarities and correspondences with the early Linji House and previous Chán traditions—particularly Huineng's "Sudden Enlightenment" (Southern Chán)—in Tang Dynasty China.

Fuke monks or priests (komusō) were noted for playing the shakuhachi bamboo flute as a form of meditation known as suizen ("blowing meditation"), an innovation from the earlier zazen ("sitting meditation") of other Zen sects. Fuke Zen was characterized in the public imagination of Japan by its monks' playing of the shakuhachi flute while wearing a large woven basket hat that covered their entire head as they went on pilgrimage.

The theoretical basis of Fuke-shū was to emphasise the concept of the incommunicable aspect of enlightenment, an ideal traced to various Buddhist sects and relayed in paradoxical Zen writings such as the Lankavatara Sutra, the Diamond Sutra and Bodhidharma's "Bloodstream sermon". Thus Fuke monks rarely chanted sutras or other Buddhist texts, but rather relied upon scores of sacred shakuhachi music called honkyoku to express and transmit awakening.

...
Wikipedia