Hidden in the mountains near Murakami, Shichimen Daimyojin Cave is shrouded in legend. Locals say it was once used to imprison a dangerous multi-headed demon or spirit (oni), and the cave is adorned with statues and offerings meant to ward off evil. Explorers report an oppressive atmosphere and a sense of unease, and the area is still a destination for those seeking out haunted or mysterious sites in Niigata.