Ono no Komachi
The original work, Sotoba Komachi written by Kan'ami, was originally a conversation between two priests and a 99-year-old lady at a Buddhist shrine. She later admits that she is Ono no Komachi (one of the six great "waka" poets in Heian period). She is then possessed by Captain Fukakusa (one of Komachi’s suitors) angry spirit and confesses to visiting Komachi for 99 nights in order to earn her love but lacking one and dying in agony. Mishima reworked the story and borrowed the characters (the old lady and Captain Fukakusa) from Kanami’s Sotoba Komachi.