Ezofuji is the name referred to the twin volcanoes that the native people of Kamui, the Oina, view as their guardian deities, or kaskamuy. The peaks are said to be the home of the Twin Demons, Lechku and Nechku, who have been laid at rest for longer than anyone can recall, even legends. Ezofuji also helps the inhabitants of Kamui not freeze to death in the harsh cold, thanks to the lava.

Every year, the most spiritual member of the Oina tribe is trained and sent to Ezofuji to perform a ritual, which helps provide immediate flow of life-giving lava.