1. Vajrayāna Vajrayāna , Mantrayāna, Tantrayāna, Tibetan Buddhism, Tantric Buddhism and Esoteric Buddhism are terms referring to the various Buddhist traditions of Tantra and " Secret Mantra ", which developed in Medieval India and spread to Tibet, Bhutan, and East Asia. In Tibet , Buddhist Tantra is termed Vajrayāna , while in China it is generally known as Tangmi Hanmi (" Chinese Esotericism ") or