Psychic Detective Yakumo (心霊探偵 八雲 Shinrei Tantei Yakumo) is a mystery novel series written by Manabu Kaminaga, published by Nihon Bungeisha with illustrations by Katoh Akatsuki and later published by Kadokawa Bunko with cover illustrations by Yasushi Suzuki. The book has been adapted into two manga series, an anime, a live-action drama series and a stage play.
Reserved college student Yakumo Saitou was born with a red left eye that allows him to see ghosts and spirits. He uses it with the belief that if he can communicate with them and resolve any issue they may have, then the ghost or spirit can move on to the afterlife. A fellow college student named Haruka Ozawa appears one day, asking him for help to save her friend, who she believes is being possessed by a spirit. He reluctantly accepts and afterwards gets involved in other supernatural related mysteries with her helping him.