"Northern Buddhism" sometimes refers to Buddhism as practiced in
East Asia and the
Tibetan Plateau, particularly
Bhutan,
China,
Japan,
Korea,
Mongolia,
Nepal,
Taiwan,
Tibet, and
Vietnam, and formerly in
medieval India before the
decline of Buddhism in the Indian subcontinent. It is often held to be synonymous with
Mahāyāna Buddhism. However, the term Northern Buddhism is also sometimes used to refer specifically to
Tibetan (including
Mongolian) Buddhism. In this terminology, the traditions of Buddhism that were established in
China,
Japan,
Korea etc. are collectively referred to as "Eastern Buddhism". The Brill
Dictionary of Religion uses the term "Northern Buddhism" in a sense exclusive of
Vajrayāna Buddhism. In
pre-sectarian Buddhism, doctrinal variations did not necessarily imply separate organizations, so the
Mahāyāna movement spread within rather than institutionally separating itself from the
early monastic orders. The same is generally true of
Tibetan Buddhist monasticism; the monastic code followed is that of the
Mūlasarvastivāda, an ancient Indian order of Buddhist monks. Tibetan Buddhists also share
tantric practices and perspectives belonging to both
Mahāyāna and
Vajrayāna branches of Buddhism, while they are divided into monastic orders are loosely organized schools based on
different lineages of teachers and not, in most cases, on strictly doctrinal differences. Additionally, the main four traditions of Tibetan Buddhism are
Kagyu (bka' brgyud),
Sakya (sa skya'),
Nyingma (rnying ma), and
Geluk (dge lugs), but each of these major schools contains groupings within it, which may be to a greater or lesser extent autonomous. Certain doctrinal positions or specialisms in specific practices are associated with each school, but just as in the ancient Buddhist orders, there are no rigid sectarian boundaries. The Buddhism of this branch derives from later Indian Buddhism, especially of the
Pāla dynasty (ruling over
Bengal,
Bihar from the 8th to 12th centuries CE), incorporating Buddhist monastic scholarship, Mahāyāna philosophy, and tantric traditions. It preserves
large collections of scriptural and commentarial Buddhist texts in
Tibetan language, including a comprehensive set of translations from
Sanskrit literary sources as well as a vast indigenous literature. ==Mahayana and Theravada in Asia==