Ishikozume was a ritual execution performed in ancient Japan by the Yamabushi - practitioners of Shugendō. The ritual is characterized by waist high burial in earth followed by lapidation (death by stoning).[1]
References
^Earhart, H. Byron (August 1966). "Ishikozume Ritual Execution in Japanese Religion, Especially in Shugendō". Numen13 (1): 116–127. doi:10.1163/156852766X00077. JSTOR3269418.