Daihizan Kannonji Temple and Bukkai Shonin 大悲山観音寺と仏海上人

Becoming a Buddha on earth included a process of self-mummification, which could take up to a decade to complete. Prospective sokushinbutsu would adopt an extremely strict diet to rid themselves of tissue prone to decomposition. They ate no grains or sources of fat and sustained themselves instead on wild plants, leaves, bark, and roots. In order to minimize the amount of fluid in their bodies, they drank only a poisonous tea made from lacquer sap that slowly coated their internal organs, acting as a preservative.

When they felt the time had come, the ascetics would be enclosed in a small stone casket. Sitting in the lotus position, they would enter a deep meditative state until their breathing stopped and their heart ceased to beat.

Bukkai took this final step in 1903, asking his followers to extract his body three years later. However, they were prevented from doing so by a law enacted in 1868 that made it illegal to disinter corpses. The law was part of a policy intended to discourage the sokushinbutsu practice. The mummy remained underground until 1961, when it was exhumed by a group of researchers.

The body of Bukkai Shonin, as well as the casket he was buried in, can be viewed at Daihizan Kannonji.