Mount Shumisen is one of the three requirements for Hiruko's Chimera Technique to completely absorb all five of Hiruko's victims, "earth", and the mountain being close to the solar eclipse, which is another requirement, "heaven". The five human sacrifices, "human", would allow Hiruko to become immortal and perfect. When Naruto Uzumaki prevented Hiruko from completing the ritual of absorbing Kakashi Hatake (which inadvertently saved Hiruko from Kakashi's time-triggered Kamui), Hiruko released a massive wave of chakra to destroy his own fortress, and their ensuing battle, alongside that of Hiruko's fused subordinates against Konoha 11, caused much of the mountain to be blown apart.