stylistic:tone
Mount Kōya

In 816, Emperor Saga accepted Kūkai's request to establish a mountain retreat at Mount Kōya as a retreat from worldly affairs. The ground was officially consecrated in the middle of 819 with rituals lasting seven days. He could not stay, however, as he had received an imperial order to act as advisor to the secretary of state, and he therefore entrusted the project to a senior disciple. As many surviving letters to patrons attest, fund-raising for the project now began to take up much of Kūkai's time, and financial difficulties were a persistent concern; indeed, the project was not fully realised until after Kūkai's death in 835.

Kūkai's vision was that Mt. Kōya was to become a representation of the Mandala of the Two Realms that form the basis of Shingon Buddhism: the central plateau as the Womb Realm mandala, with the peaks surrounding the area as petals of a lotus; and located in the centre of this would be the Diamond Realm mandala in the form of a temple which he named Kongōbu-ji ("Diamond Peak Temple"). At the center of the temple complex sits an enormous statue of Vairocana, who is the personification of Ultimate Reality.