High Quality Content by WIKIPEDIA articles! Sokushinbutsu were Buddhist monks or priests who caused their own deaths in a way that resulted in their mummification. This practice reportedly took place almost exclusively in northern Japan around the Yamagata Prefecture. It is believed that many hundreds of monks tried, but only between 16 and 24 such mummifications have been discovered to date. The practice is now extinct in modern Japan, and not advocated or practiced today by any Buddhist sect. For 1,000 days the priests would eat a special diet consisting only of nuts and seeds, while taking part in a regimen of rigorous physical activity that stripped them of their body fat.