About Kakuban

Kakuban, known posthumously as Kōgyō-Daishi (興教大師) was a priest of the Shingon sect of Buddhism in Japan and credited as a reformer, though his efforts also led to a schism between Kogi Shingon-shū  and Shingi Shingon-shū . Kakuban is also famous for his introduction of the "esoteric nembutsu".
Kakuban, known posthumously as Kōgyō-Daishi was a priest of the Shingon sect of Buddhism in Japan and credited as a reformer, though his efforts also led to a schism between Kogi Shingon-shū and Shingi Shingon-shū . Kakuban is also famous for his introduction of the "esoteric nembutsu".
Garbhadhatu (Sanskrit) or Taizo-kai (jp.) - Mandala

Shingon Buddhism – The Japanese root of Esoteric Buddhism

Shingon Buddhism is one of the major schools of Buddhism in Japan and one of the few surviving Vajrayana lineages in East Asia, originally spread from India to China through traveling monks such as and . Known in Chinese as the Tangmi these esoteric teachings would later flourish in Japan under the auspices of a Buddhist monk named (空海), who traveled to Tang China to acquire and request transmission of the esoteric teachings. .

The Dharma transmission – Founders & patriarchs of Buddhist currents

A lineage in Buddhism is a line of transmission of the Buddhist teaching that is "theoretically traced back to the Buddha himself." The acknowledgement of the transmission can be oral, or certified in documents. Several branches of Buddhism, including Chan (including Zen and Seon) and Tibetan Buddhism maintain records of their historical teachers. These records serve as a validation for the living exponents of the tradition. In Chan and Zen Buddhism, transmission is a custom .