Maitreya (Sanskrit), Metteyya (Pāli), or Jampa (Tibetan), is foretold as a future Buddha of this world in Buddhist eschatology. In some Buddhist literature, such as the Amitabha Sutra and the Lotus Sutra, he or she is referred to as Ajita Bodhisattva.
Maitreya is a bodhisattva who in the Buddhist tradition is to appear on Earth, achieve complete enlightenment, and teach the pure dharma. According to scriptures, Maitreya will be a successor of the historic Śākyamuni Buddha. The prophecy of the arrival of Maitreya references a time when the Dharma will seem to be forgotten on Jambudvipa. It is found in the canonical literature of all Buddhist sects (Theravāda, Mahāyāna, Vajrayāna), and is accepted by most Buddhists as a statement about an event that will take place when the Dharma will seem to be forgotten on Earth.
Tibetan Buddhism is the body of Buddhist religious doctrine and institutions characteristic of Tibet and certain regions of the Himalayas, including northern Nepal, Bhutan, and India (particularly in Arunachal Pradesh, Ladakh, Dharamsala, Lahaul and Spiti in Himachal Pradesh, and Sikkim). It is the state religion of Bhutan. It is also practiced in Mongolia and parts of Russia (Kalmykia, Buryatia, and Tuva) and Northeast China. Texts recognized as scripture and commentary are contained in the Tibetan Buddhist canon, such that Tibetan is a spiritual language of these areas.
A Tibetan diaspora has spread Tibetan Buddhism to many Western countries, where the tradition has gained popularity. Among its prominent exponents is the 14th Dalai Lama of Tibet. The number of its adherents is estimated to be between ten and twenty million.