Tōkaidō Yotsuya Kaidan is a famous Japanese ghost story first performed as a kabuki play in 1825.
The story follows Oiwa Tamiya, a woman married to Iemon Tamiya, a rōnin (masterless samurai). Iemon is cruel and ambitious, seeking to marry another woman, Oume, whose family is wealthy. To rid himself of Oiwa, he conspires to poison her. The poison disfigures her face instead of killing her immediately. Upon seeing her reflection, Oiwa is driven mad and dies. Thereafter, her vengeful spirit haunts Iemon, driving him to insanity and ultimately leading to his downfall.
In reenactments, Oiwa’s ghost - characterised by her long black hair, white burial kimono, and distorted face - has become an iconic figure in Japanese horror, inspiring later depictions of vengeful spirits in J-horror, such as The Ring and The Grudge (Ju-On).
Because the story is based on real events and is believed to involve a vengeful spirit, actors and production teams take precautions to avoid supernatural misfortunes. They will visit Myōgyō-ji Temple in Tokyo, where Oiwa is said to be buried, to pray for permission to perform the role and for protection from misfortune. Incense and prayers are offered to appease her spirit and ensure a smooth performance.
To prevent accidents or illnesses before, during or after the play's run, actors undergo Shinto purification rites before or after performances to remove any lingering spiritual disturbances. Yet over the years, there have been stories of mysterious accidents, illnesses, or misfortunes affecting actors and production teams involved in the play. For example:
... hence the ongoing visits to Oiwa's grave by cast and crew.
What about productions taking place too far from Myōgyō-ji Temple in Tokyo to pray at her grave? Kansai, for example. Or further in Hokkaido, Kyushu, Okinawa, Japantown in Brasil...
Assuming the cast and/or crew actually do go to the grave and appeal to Oiwa for permission to relate her story, how do they know permission has been granted?
And if no affirmative permission is received, is it accepted that permission has been refused and any performance after that is doomed to be cursed?
It's assumed that if the production runs smoothly, (no accidents, illnesses or malfunctions) then that indicates Oiwa's blessing. But if strange misfortunes occur, then her spirit is displeased.
But by that time, of course, it's too late; the performance has passed.
It seems there actually was a married couple named Oiwa and Iemon in the Edo period, and Iemon was a samurai involved in a family dispute. And it's certain they are both now deceased. But there's no historical evidence proving that Iemon poisoned Oiwa.
And as for the four misfortunes listed above, that doesn't seem a lot for the 200-year timespan.
Nonetheless, there's a moral from this story:
If you're going to poison your wife, make sure there are no side-effects such as facial disfiguration!