Sokushinbutsu (即身仏)

Sokushinbutsu (Japanese: 即身仏, そくしんぶつ, "Living Body Buddha") are mummified human remains of an ascetic monk that are the intended outcome of self-mummification techniques carried out by the monk while they are alive, this practice being known primarily among the Japanese Shugendō and Shingon Buddhist traditions.

List of mummies classed as Sokushinbutsu
Translated from 即身仏 (ja.wikipedia.org)