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 conversion, Buddhism also became an established minority religion in Latin America in the 20th century, with adherents mostly common from the educated middle classes. According to Frank Usarski, Buddhism remains a statistically small part of South America's religious field, "with around 500,000 practitioners and approximately 600 groups" of which around 27% are Tibetan Buddhists, 25% are Soka Gakkai and 22% are Zen. Japanese immigrants arrived in Latin America at the end of the 19th century and throughout the 20th century. With the largest population in Latin America, Brazil is also home to the most Buddhists (around 230,000) in Latin America