Anime and manga are a global phenomenon, and their popularity continues to grow. Many of these stories are populated by supernatural beings called yōkai. Even though yōkai can be portrayed as ghosts, demons, or monsters, they're rarely purely good or evil. We trace the history of yōkai from ancient folklore to Studio Ghibli films and shows like Dan Da Dan. I talk with scholars Kaitlyn Ugoretz, Deborah Shamoon, and Michael Dylan Foster about why these supernatural beings have captured people's imaginations, how they became central to modern pop culture, and the role they play in Japan even in times of national emergency.