This is a ghost story built on genuine betrayal, not jump scares. A woman comes back wrong, patient and specific about who deserves to suffer. The animation moves like ink in water, deliberately slow, deliberately wrong, because the horror lives in the wrongness of her presence, not in sudden noise. One special, forty-three years old, and it still works because it knows that revenge ghosts don't rush. They wait.

Anime-ban Toukaidou Yotsuya Kaidan is a one-episode horror special from 1981 that adapts Yotsuya Kaidan, one of the classic ghost stories of Japan. Its plot centers on a ghost seeking revenge, and the supernatural genre tag fits a tale in which the dead come back to settle a score.