Transmission through Kūkai
In the early Heian period, Kūkai travelled to Tang China and studied with Huiguo in Chang’an. He brought back scriptures, ritual texts and implements and organised their transmission in Japan. Tōji and Mount Kōya became major centres. Shingon refers to true words, understood within the tradition as expressions of Buddhist truth.
Centres and lineages after Kūkai
The Buzan branch’s history connects Kakuban’s revival of study, Negoroji and Raiyu’s medieval Shingi teaching. Warfare later scattered monks from Negoro. Senyō developed the Buzan lineage at Hasedera, while Gokokuji became an Edo-period centre. Branch history thus involves interpretation, teaching institutions and networks of temples, as well as individual founders.
Modern institutions at Kōyasan
At Kōyasan, modern reforms changed the institution as well as its land and access. Two temples merged under the name Kongōbuji in 1869, and temple estates were returned to the state in 1871. The ban on women’s entry ended in 1872; official permission to reside followed in 1905. The Kōyasan Shingon denomination was established in 1946, with Kongōbuji as its head temple.
Branches and other esoteric traditions
Kōyasan’s account groups affiliations under Kogi Shingon, Shingi Shingon and Shingon Ritsu, with separate denominations and temples. Negoroji dates the public name of its present Shingi Shingon denomination to 1953, distinct from medieval teaching. Japanese esoteric Buddhism also includes Tendai traditions: Tendai’s history uses Taimitsu for its esotericism and Tomitsu for Shingon.