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Spirit in Japanese folklore

Rokurokubi (ろくろ首, 轆轤首) is a type of Japanese yōkai (apparition). They look almost completely like humans with some differences. There is a type whose neck stretches and another whose head detaches and flies around freely (nukekubi). The Rokurokubi appear in classical kaidan (spirit tales) and in yōkai works.

The word rokurokubi may have derived from the word rokuro which refers to a potter's wheel, a water well's pulley (since it elongates) or an umbrella handle (which also elongates).

[[File:ShokokuHyaku Rokurokubi. jpg|thumb|right|Wechizen no Kofuchuu Rokurokubi no Koto (ゑちぜんの国府中ろくろ首の事) from the Shokoku Hyaku Monogatari (諸国百物語) Nukekubi sometimes perform bad deeds such as attacking at night and drinking their victims' blood. It is theorized that the nukekubi has a weakness when it is sleeping and the head is floating around: if the body moves, then the head cannot be re united to the body. Classical literature about rokurokubi describe tales of people witnessing and encountering floating heads at night time. In the same book, there is a story which tells of a woman in the village of Tawa, Nagao, Ōkawa District, Kagawa Prefecture (now Sanuki) who is a rokurokubi and has a ring like bruise around her neck. In the Kasshi Yawa (甲子夜話, c. 1821 CE) by Matsura Seizan is a story which tells of a woman in Hitachi Province who has a terminal illness. A peddler has told her husband that the liver of a white dog will cure her. The husband kills the pet dog and gives his wife the dog's liver as a medicant. The woman is cured but her next born daughter is a rokurokobi. When the rokurokubi's head detached and flew in the air, the white dog appeared, bit the head and killed the rokurokobi. Although rokurokubi and nukekubi are usually female, in Shousai Hikki (蕉斎筆記), an Edo period tale, there is a nukekubi that is male. A priest is sleeping in his temple when a head appeared and approached his chest. He grabs it and throws it away and it left. In the morning, the manservant asks to take leave and when asked why, the manservant asks, "did a head come visit last night?" The priest answered yes, the manservant then explained that "I have the nukekubi illness and I fear it will interfere with my work too much from now on." The manservant went away to his home in Shimōsa Province where this "illness" was thought to be common. In the essay Mimibukuro by Negishi Shizumori, a woman who was rumored to be a rokurokubi is married, but manages to live well since the rumor was nothing more than a rumor. She was not actually a rokurokubi, so she achieved a happy ending, which is unusual for tales about rokurokubi because bad fortune almost always results when the true identity of a rokurokubi is discovered. The foreigner nukekubi also appears in Rokurokubi by Lafcadio Hearn. In his story, the spirits masquerade as a family of woodcutters from the city who kill and eat travelers and mostly men.

thumb|right|Rokurokubi (飛頭蛮) from the Gazu Hyakki Yagyō by Sekiyama Torien. What is depicted here is not a neck, but actually a string that connects the head to the body. Starting in the Edo period, tales were written about people's necks stretching when they were asleep. Examples of these tales are Buya Zokuda (武野俗談), Kanden Kōhitsu (閑田耕筆) and Yasō Kidan (夜窓鬼談). It is thought that the idea of an extending neck originated from people misinterpreting visual depictions of nukekubi, the earlier kind of rokurokubi. There was the idea that nukekubi had a string attaching the head to the body and when this string was depicted in visual depictions, people misinterpreted this string as an elongated neck. In the Kasshi Yawa (甲子夜話), there is a tale which tells of a female servant with a pale face who is suspected to be a rokurokubi. One night, her master checks on her while she is sleeping and sees something like steam gradually rise from her chest. The steam becomes thick and obscures her head and then suddenly it appears as though her neck has risen up and stretched. Perhaps due to being surprised from seeing her master, the girl stirs, turns over and her neck returned to normal. This servant had a pale face, but otherwise looked completely normal, but despite this, she was fired and in fact has had trouble staying in any job, always being fired shortly after being employed. For the soul to leave the body and create the shape of a neck, as seen in this story and the before mentioned Hokusō Sadan, is sometimes interpreted to be "ectoplasm" in parapsychology. In the late Edo period yomihon (illustrated novel), Rekkoku Kaidan Kikigaki Zōshi (列国怪談聞書帖) by Jippensha Ikku the author suggests the elongated necks of rokurokubi originate in the spiritual principle, karma. In Ikku's work, Kaishin, a monk from Enshū and a woman called Oyotsu elope together. However, when Oyotsu collapsed from an illness, they ran out of money, so he killed her. When Kaishin eventually returned to secular life, he slept with a girl he met at an inn. When they sleep together, the girl's neck stretched and her face becomes that of Oyotsu, who then told him about her resentment. Kaishin felt regretful of his actions and proceeded to tell Oyotsu's father everything. The girl's father then told Kaishin that he has also killed a woman before. He stole her money and with it, he opened his inn. He had a daughter soon after who, due to karma, became a rokurokubi. Kaishin then reentered the priesthood. He built a grave for Oyotsu, said to be the Rokurokubi no Tsuka (Rokurokubi Mound), which told the story to future generations. Another example is a myth from the oral tradition of the Koikubo area of Iida, Nagano Prefecture where it is said a rokurokubi appeared in someone's home. In the Bunka period, a kaidan story became popular, where there was a prostitute whose neck would smoothly stretch and would lick the oil of paper lanterns when she slept with guests, showing how rokurokubi were spoken of as things that women would transform into or an illness that they would be afflicted with. In this period, rokurokubi were also popular in freak shows.

The rokurokubi is also a kind of Japanese magic trick using curtains and life sized dolls without heads. It's reported that a doll without a head wearing a kimono in seiza is put in front of the curtain. There's a rope behind the curtain and a female performer connected to it who shows only her face. As she stands and squats, the fake neck would stretch and contract, as if it were a rokurokubi. Explanations and pictures about what's behind this trick were written in magazines of the Meiji period (1800s), giving a date for how early these shows first appeared. This was a time period when mystery phenomena were vigorously exposed by the scientifically minded, so for magic tricks to be revealed is fitting with the zeitgeist. In the Taishō period, there were businesses arranging rokurokubi to appear in show tents in festivals and fairs at temples and shrines and they were quite popular. There are legends of creatures including Palasik, Kuyang, and Leyak from Indonesia, Penanggalan in Malaysia, and Krasue in Thailand. The heads of these creatures would separate from the body and float about with the entrails attached. The Chonchon is a mythical creature of South America which takes the form of a human head flying around in the air, sucking the life out of people. The manananggal is a creature of Philippines mythology. This female monster is slightly different since its whole body from the waist up detaches and grows giant bat like wings. The yōkai researcher, Tada Katsumi states that these stories arrived in Japan in the Muromachi to Azuchi Momoyama periods, when there was still trade with southern China and Southeast Asia. In the Edo period, when Japan adopted an isolationist policy an original Japanese yōkai, the rokurokubi evolved.

The Pokémon family of Misdreavus and Mismagius is based on the nukekubi. In Hellboy: Sword of Storms, Hellboy has encounters with both nukekubi and rokurokubi. The Touhou Project character Sekibanki is a rokurokubi. The Teacher from Little Nightmares 2 can extend her neck like a rokurokubi. The Murmur from the Alex's Mobs Minecraft modification attacks by extending their neck and spawns in Cherry Groves, Japanese themed biome.