Dhyāna in Buddhism the Japanese Rinzai school, but it also occurs in other schools or branches of Zen depending on the teaching line. The Zen student's mastery of a given kōan is presented to the teacher in a private interview (referred to in Japanese as "dokusan" (独参), "daisan" (代参), or "sanzen" (参禅)). While there is no unique answer to a kōan, practitioners are expected to demonstrate their understanding of the kōan and of Zen through their responses. The teacher may approve or disapprove of the answer and guide the student in the right direction. The interaction with a Zen teacher is central in
Buddhism in the West general distinction between Buddhism brought to the West by Asian immigrants, which may be Mahayana, Theravada or a traditional East Asian mix ("ethnic Buddhism"), and Buddhism as practiced by converts ("convert Buddhism"), which is often Zen, Pure Land, Vipassana or Tibetan Buddhism. Some Western Buddhists are actually non-denominational and accept teachings from a variety of different sects, which is far less frequent in Asia. Demographically as a convert religion, Western Buddhism appeals more to whites and to the middle and upper-middle classes as well as to the politically left wing and to those who live in urban areas. While retaining