For those unaware, Gashadokuro are a yokai in Japanese folklore. They are said to be born on battlefields where many people and animals lost their lives. None of them ever received any death rites or memorials, so the intense anger builds up and their skulls and bones come together to form one giant skeletal creature.

The Gashadokuro will then hunt humans and eat them, usually at night, continuing this behaviour until all the residual anger has dissipated, and it crumbles and disappears