In Vajrayana Buddhism, the ?di-Buddha (Tibetan: , Wylie: dang po'i sangs rgyas, THL: Dangpö Sanggyé), is the "First Buddha" or the "Primordial Buddha." Another common term for this figure is Dharmak?ya Buddha.
The term emerges in tantric Buddhist literature, most prominently in the Kalachakra. "?di" means "first", such that the ?dibuddha was the first to attain Buddhahood. "?di" can also mean "primordial," not referring to a person but to an innate wisdom that is present in all sentient beings.
According to Anthony Tribe, this tradition may have influenced the Jñ?nap?da tradition of Guhyasam?ja exegesis, which places Mañjuvajra (a tantric form of Mañju?r?) at the center of the Guhyasam?ja mandala.
Vesna Wallace describes the concept of ?dibuddha in the Kalachakra tradition as follows:
when the Kalacakra tradition speaks of the ?dibuddha in the sense of a beginningless and endless Buddha, it is referring to the innate gnosis that pervades the minds of all sentient beings and stands as the basis of both samsara and nirvana. Whereas, when it speaks of the ?dibuddha as the one who first attained perfect enlightenment by means of imperishable bliss, and when it asserts the necessity of acquiring merit and knowledge in order to attain perfect Buddhahood, it is referring to the actual realization of one's own innate gnosis. Thus, one could say that in the Kalacakra tradition, ?dibuddha refers to the ultimate nature of one's own mind and to the one who has realized the innate nature of one's own mind by means of purificatory practices.
According to Jim Valby (translator of the Kunjed Gyalpo), in the Dzogchen tradition, Samantabhadra ("All-Good") is not a God but "our timeless Pure Perfect Presence beyond cause and effect." The Guhyasam?ja Tantra calls Vajradh?ra (the "Vajra holder"),
"the Teacher, who is bowed to by all the Buddhas, best of the three vajras, best of the great best, supreme lord of the three vajras."
Alex Wayman notes that the Prad?poddyotana, a tantric commentary, explains that the "three vajras" are the three mysteries of Body, Speech, and Mind, which are the displays of the ?dibuddha. Wayman further writes:
"Tsong-kha-pa's Mchan-'grel explains the "lord of body": displays simultaneously innumerable materializations of body; "lord of speech": teaches the Dharma simultaneously to boundless sentient beings each in his own language; "lord of mind": understands all the knowable which seems impossible.
According to the 14th Dalai Lama, the ?dibuddha is also seen in Mahayana Buddhism as representation of the universe, its laws and its true nature, as a source of enlightenment and karmic manifestations and a representation of the Trikaya.
In Chinese Esoteric Buddhism, and in Japanese Shingon, the ?dibuddha is typically considered to be Mah?vairocana. In Japanese Shingon, the terms Primordial body (honji-shin) and Dharmakaya principle (riho-jin) are used to refer to the ?dibuddha. It is also associated with the letter A, the first letter of the Siddham Alphabet, and is seen as the source of the universe.
The Lotus Sutra states that Sakyamuni Buddha is the "Eternal Buddha." This was the view of Nichiren, and of some modern Nichiren Buddhist schools. However, the Nikko-lineage, specifically the Soka Gakkai and Nichiren Shoshu, regard Nichiren himself as the ?dibuddha and dispute the contentions of other sects that view him as a mere bodhisattva.