Category Tantrism
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Tantrism, whether Buddhist or Hindu, can best be characterized as practices, a set of techniques with a strong focus on rituals and meditation providing a path to liberation through knowledge and freedom.
In Buddhism, the Vajrayana traditions are known for tantric ideas and practices, which are based on Indian Buddhist Tantras.
They include Indo-Tibetan Buddhism, Chinese Esoteric Buddhism, Japanese Shingon Buddhism and Nepalese Newar Buddhism.