In this episode of YOKAI: Exploring Hidden Japanese Folklore, we journey to the Shima Peninsula of Mie Prefecture, where legend tells of the Tomokazuki. When shell divers descended into the ocean, it is said they'd be met by another diver who held out an abalone to them. If they accepted it, they'd be seized by the doppelganger and dragged into the depths. What reason could the Tomokazuki have for this behavior? Yokai researcher Michael Dylan Foster gets beneath the surface of the creature.