The Yōka (妖花, lit. Yōkai Flower) are flower yōkai.
The Yōka appears in episode #20 of the sixth anime adaptation, Memories of the Yōka. After Soujiro died on an island of Papua New Guinea, his feelings had imbued into the letter he was holding, this caused a field of Yōka to sprout around the sacred tree where his remains and those of his fellow Japanese soldiers were buried. The Yōka managed to ride the winds to grow more flowers, until they reached Toshiko's home, blooming around Obon.
When Mana and her mother are tasked by Toshiko to watch the flowers, Mana sends pictures of these flowers to Neko-Musume who shows it to Kitarō and his father. Upon seeing them, they visit Mana, which they inform her of the plants and how they work. Kitarō senses no malicious presence and wonders about the Yōka's origin. Mana is entranced by the flowers and decides to join them when they plan to find it. They find numerous islands with Yōka planted near their shores, but cannot find the source, until they reach an island past the equator, where Kitarō is sure of it. After venturing through the jungle they find a Japanese logging company and asks the foreman if he has seen the flower, he becomes terrified and Nezumi-Otoko tricks him into explaining. The foreman tells them that since finding the flowers in the jungle, horrifying noises are heard every night. During the night, the noises occur as Mana wanders through the jungle, eventually being lead by footprints to the sacred tree surrounded by fields of Yōka. Immediately, Kitarō and the others arrive and they discover the remains of the Japanese soldiers and are told by the foreman that he and his men were ordered to remove them. This intimidated the Tubuan who had guarded them, causing the nightly noises.
Kitarō finds the letter and gives it to Mana, Medama-Oyaji wonders how the letter managed to not rot away, finding it strange. He guesses that the power from Soujiro's feelings had took root in it and believes that because he was unable to tell his love what happened, is what lead to Yōka being born and rode the winds to Japan, making that year's blooming to be a final message, sensing that the place would be lost. Mana gives the letter to Toshiko once returning to Japan. After reading the letter, Toshiko sheds a tear and understands that her love did come back. The winds blow as silhouettes of Soujiro and a younger Toshiko appear standing among the Yōka.
- ↑ GeGeGe no Kitarō (1968): Episode 32
- ↑ GeGeGe no Kitarō (1985): Episode 71
- ↑ GeGeGe no Kitarō (1996): Episode 30
- ↑ GeGeGe no Kitarō (2007): Episode 96
- ↑ GeGeGe no Kitarō (2018): Episode 20