Wikipedia
Zhenzhou Puhua ( Chinese: traditional: 鎮州普化, simplified: 普化, pinyin: Zhenzhou Pǔhuà; Japanese: Jinshu Fuke, honorifically Fuke Zenji (lit. "Zen master Fuke")—allegedly ca. 770-840 or 860), also called P'u-k'o, and best known by his Japanese name, Fuke, was a potentially mythical Chinese Chán ( Zen) master, monk-priest, wanderer and eccentric, whose existence and many affairs were advanced and likely fabricated by the now defunct Fuke Zen or Hotto-ha sect, or sub-sect, of Japanese Rinzai Zen Buddhism in the 17th or 18th century with the publication of the later-disconfirmed document, the Kyotaku Denki , probably first published around 1640. For the komusō monks of the Fuke sect, he was considered the traditional antecedent—at least in spiritual or philosophical terms—of their order, which was formally established in Edo Japan. It is more likely that the ideological roots of the sect derived from the Rinzai poet and iconoclast Ikkyū and the monk Shinchi Kakushin who traveled to and from China and Japan in the 13th century. Still according to some accounts the sect is simply a more direct derivative of the Rinzai school and its teachings.
The few records of Puhua's life and affairs are those accounted, if only briefly, in several East Asian religious or historical references. One of the only credible sources on his life is to be found in the Tang Dynasty Record of Linji, wherein he is portrayed as an obscure student and eventual dharma heir of Panshan Baoji, as well as a friend, colleague, student and/or contemporary of Linji Yixuan, who founded the Linji (臨済宗 Rinzai) sect in China. This implies that he may have been a real individual, although the legends surrounding him in the Kyotaku Denki which connect him to the Fuke sect have been proven as fabrications created to further the komusōs' benefits under the Tokugawa shogunate.
The legends surrounding Puhua were more recently mentioned in the Monumenta Nipponica, R.H. Blyth's A History of Haiku (published in 1963) as well as some of the writings of Osho, along with later publications concerning the Fuke-shū, the shakuhachi and related topics. In 1988 a shakuhachi learning and playing manual co-authored by the shakuhachi performer Christopher Yohmei Blasdel and the scholar Kamisango Yūkō was published; the work is entitled The Shakuhachi: A Manual for Learning (ISBN 978-1933606156), and thoroughly details the historicity of Fuke/Puhua and the precursors to Fuke Zen in China.