Diamond Youkai
A mineralogist disappears inside a cave near Mount Jigoku, leading Kitaro to investigate a yokai with the power to turn humans into diamonds.
EP 36 - Diamond Youkai
1968
Gegege no Kitarou (1968)
Kitarou, a ghost, spends his afterlife helping humans in need of his skills. He thwarts the plans of evil spirits who live to torment humanity.