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
Dhyāna in Buddhism sutras, which were influential early meditation texts mostly based on the Yogacara meditation teachings of the Sarvāstivāda school of Kashmir circa 1st-4th centuries CE. The word "chán" became the designation for Chan Buddhism (Korean Seon, Zen). While "dhyana" in a strict sense refers to the four "dhyanas", in Chinese Buddhism "dhyāna" may refer to various kinds of meditation techniques and their preparatory practices, which are necessary to practice "dhyana". The five main types of meditation in the "Dyana sutras" are anapanasati (mindfulness of breathing); paṭikūlamanasikāra meditation, mindfulness of the impurities of the body; loving-kindness maitrī meditation; the contemplation on the