Japanese Zen is derived from the Japanese pronunciation of the Middle Chinese word 禪 (Chan) which traces its roots to the Indian practice of dhyāna ("meditation"). Buddhism was introduced to China in the first century CE. According to tradition, Chan was introduced around 500 CE by Bodhidharma, an Indian monk teaching dhyāna. He was the 28th Indian patriarch of Zen and the first Chinese patriarch. Buddhism was introduced in Japan in the 8th century CE during the Nara period (710-794) and the Heian period (794–1185). Zen was not introduced as a separate school in Japan until the 12th century during the Kamakura
Doctrinal background of Zen Doctrinal background of Zen Zen has a rich doctrinal background, despite the traditional Zen narrative which states that it is a "special transmission outside scriptures" which "did not stand upon words." Classical Chinese Chán is characterised by a set of polarities: absolute-relative, Buddha-nature - sunyata, sudden and gradual enlightenment, esoteric and exoteric transmission. The Prajnaparamita-sutras and Madhyamaka emphasized the non-duality of form and emptiness: "form is emptiness, emptiness is form", as the heart sutra says. This was understood to mean that ultimate reality is not a transcendental realm, but equal to the daily world of relative reality. This idea fitted