Some Mahāyāna sūtras are also thought to display a distinctly tantric character, like some of the shorter Perfection of Wisdom sutras and the "Mahavairocana Sutra". At least some editions of the Kangyur include the "Heart Sutra" in the tantra division. Such overlap is not confined to "neighbouring" yanas: at least nine "Sravakayana" texts can be found in the tantra divisions of some editions of the Kangyur. One of them, the "Atanatiya Sutra", is also included in the Mikkyo (esoteric) division of the standard modern collected edition of Sino-Japanese Buddhist literature. Some Mahāyāna texts also contain "dhāraṇī," which are chants that are believed to have magical and spiritual power.