Buddhism is also Mahayana in origin, but is discussed below under the heading of Vajrayana (also commonly referred to as "Northern Buddhism"). There are a variety of strands in Eastern Buddhism, of which "the Pure Land school of Mahayana is the most widely practised today.". In most of this area however, they are fused into a single unified form of Buddhism. In Japan in particular, they form separate denominations with the five major ones being: Nichiren, peculiar to Japan; Pure Land; Shingon, a form of Vajrayana; Tendai, and Zen. In Korea, nearly all Buddhists belong to the Chogye school, which is
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