The user creates two enormous rock formations that close in on the opponent from two opposing sides with tremendous force, smashing everything caught in between. Both of these formations are capable of dwarfing even the Demonic Statue of the Outer Path in size, and each one has the symbol of Iwagakure inscribed upon it. Kitsuchi stated that this was his strongest technique, standing as a testament to both this ability's destructive potential and its difficulty. To perform this technique it requires that the user slams their hands on the ground.
- The word sando is a Japanese abbreviation for the English word sandwich. The technique is written with the kanji for "mountain" and "earth", both pronounced with their onyomi, while they would usually be pronounced with their kunyomi as "yamatsuchi".