The Yagoura Society (御秡如協会Yagourā kyōkai) is a spiritual cult introduced in Corpse Party CEMETERY0 ~Kaibyaku no Ars Moriendi~. The cult makes its first in-game appearance in Corpse Party: Blood Drive.
It was founded by the grandfather of Misuto Kiriya, whom broke away from his lineage as a Shinto priest to become leader of this new order. The founder is also responsible for stealing the Book of Shadows from another cult, Martuba's Tomb, and entrusting it to the Shinozaki family in an effort from keeping that power from falling into the wrong hands. Despite his righteous actions, the organization's founder was persecuted as a heretic, slandered, and ostracized. Under tremendous pressure, Misuto implied that he had lost his sanity, and died, alone and humiliated, though how and when he died is unknown.
The remaining members of Yagoura - his son, his son's wife, and his grandson - were harassed and ostracized by terrified townspeople, who associated their affinity for the occult as a threat to their safety. Despite this, Misuto states them to have been good people, who wanted to live their lives peacefully. The man and his wife later committed suicide together, unable to tolerate their cruelty.
The last surviving member was Misuto, who ironically died while attempting to revive the cult by instating himself as the new leader and dictating the world with his new Book of Shadows to wreak havoc on the humanity that had wronged him and his family.
Corpse Party CEMETERY0 ~Kaibyaku no Ars Moriendi~ Edit
A woman named Shinozaki (whose first name is unknown) has infiltrated into Martuba's Tomb as a spy. She also managed to rescue Naho Saenoki from Martuba's experimentation with the Fuþark curse. Magari Mizuki, however, discovered her allegiance to Yagoura and beheaded her to prevent information leak.
Corpse Party: Blood Drive Edit
Misuto seeked revenge on the humanity and aimed to "purge" the world from impurities. Using Ayumi Shinozaki to carry out his plan, he created the New Book of Shadows from the Nirvana's core, bringing catastrophe into the real world. However, his plan failed after Ayumi managed to retrieve the real Book of Shadows and destroyed his Book of Shadows, and absorbed the book's power.
Misuto later was killed by Satsuki Mizuhara under Magari's order after he managed to escape from Ayumi and Aiko Niwa. With Misuto's death, the last known member of Yagoura was gone and the cult was extinct.