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Yūrei (幽霊?) are figures in Japanese folklore, analogous to Western legends of ghosts. The name consists of two kanji, 幽 (yū), meaning "faint" or "dim" and 霊 (rei), meaning "soul" or "spirit." Alternative names include 亡霊 (Bōrei) meaning ruined or departed spirit, 死霊 (Shiryō) meaning dead spirit, or the more encompassing 妖怪 (Yōkai) meaning "goblin"  or お化け (Obake) meaning "changing thing".
According to traditional Japanese beliefs, all humans have a spirit or soul called a 霊魂 (reikon). When a person dies, the reikon leaves the body and enters a form of purgatory, where it waits for the proper funeral and post-funeral rites to be performed, so that it may join its ancestors. If this is done correctly, the reikon is believed to be a protector of the living family and to return yearly in August during the Obon Festival to receive thanks.
However, if the person dies in a sudden or violent manner such as murder or suicide, if the proper rites have not been performed, or if they are influenced by powerful emotions such as a desire for revenge, love, jealousy, hatred or sorrow, the reikon is thought to transform into a yūrei, which can then bridge the gap back to the physical world. The emotion or thought need not be particularly strong or driving, and even innocuous thoughts can cause a death to become disturbed. Once a thought enters the mind of a dying person, their Yūrei will come back to complete the action last thought of before returning to the cycle of reincarnation.
The yūrei then exists on Earth until it can be laid to rest, either by performing the missing rituals, or resolving the emotional conflict that still ties it to the physical plane. If the rituals are not completed or the conflict left unresolved, the yūrei will persist in its haunting.
Oftentimes the lower the social rank of the person who died violently, or who was treated harshly during life, the more powerful as a yūrei they would return. This is illustrated in the fate of Oiwa in the story Yotsuya Kaidan, or the servant Okiku in Banchō Sarayashiki.
In the late 17th century, a game called Hyakumonogatari Kaidankai became popular, and kaidan increasingly became a subject for theater, literature and other arts. At this time, they began to gain certain attributes to distinguish themselves from living humans, making it easier to spot yūrei characters.
Ukiyo-e artist Maruyama Ōkyo created the first known example of the now-traditional yūrei, in his painting The Ghost of Oyuki. The Zenshō-an in Tokyo houses the largest single collection of yūrei paintings which are only shown in in August, the traditional month of the spirits.
Today, the appearance of yūrei is somewhat uniform, instantly signalling the ghostly nature of the figure, and assuring that it is culturally authentic.
- White clothing: Yūrei are usually dressed in white, signifying the white burial kimono used in Edo period funeral rituals. In Shinto, white is a color of ritual purity, traditionally reserved for priests and the dead. This kimono can either be a katabira (a plain, white, unlined kimono) or a kyokatabira (a white katabira inscribed with Buddhist sutras). They sometimes have a hitaikakushi (lit., "forehead cover"), which is a small white triangular piece of cloth tied around the head.
- Black hair: Hair of a yūrei is often long, black and disheveled, which some believe to be a trademark carried over from kabuki theater, where wigs are used for all actors. This is a misconception: Japanese women traditionally grew their hair long and wore it pinned up, and it was let down for the funeral and burial.
- Hands and feet: A yūrei's hands dangle lifelessly from the wrists, which are held outstretched with the elbows near the body. They typically lack legs and feet, floating in the air. These features originated in Edo period ukiyo-e prints, and were quickly copied over to kabuki. In kabuki, this lack of legs and feet is often represented by using a very long kimono or even hoisting the actor into the air by a series of ropes and pulleys.
- Hitodama: Yūrei are frequently depicted as being accompanied by a pair of floating flames or will o' the wisps (hitodama in Japanese) in eerie colors such as blue, green, or purple. These ghostly flames are separate parts of the ghost rather than independent spirits.
While all Japanese ghosts are called yūrei, within that category there are several specific types of phantom, classified mainly by the manner they died or their reason for returning to Earth.
- Onryō: Vengeful ghosts who come back from purgatory for a wrong done to them during their lifetime
- Ubume: A mother ghost who died in childbirth, or died leaving young children behind. This yūrei returns to care for her children, often bringing them sweets
- Goryō: Vengeful ghosts of the aristocratic class, especially those who were martyred
- Funayūrei: The ghosts of those who died at sea. These ghosts are sometimes depicted as scaly fish-like humanoids and some may even have a form similar to that of a mermaid or merman
- Zashiki-warashi: The ghosts of children, often mischievous rather than dangerous
- Samurai Ghosts: Veterans of the Genpei War who fell in battle. Warrior Ghosts almost exclusively appear in Noh Theater. Unlike most other yūrei, these ghosts are usually shown with legs
- Seductress Ghosts: The ghost of a woman or man who initiates a post-death love affair with a living human, as seen in Botan Dōrō
- Earth-bound spirits (Japanese: 地縛霊, hepburn: jibakurei): Something of a rarity among Yūrei, these spirits do not seek to fulfill an exact purpose and are instead bound to a specific location or situation. Famous examples of this include the famous story of Okiku and the haunting in Ju-On: The Grudge.
There are two types of ghosts specific to Buddhism, both being examples of unfullfilled earthly hungers being carried on after death. They are different from other classifications of yūrei due to their wholly religious nature.
In Japanese folklore, not only the dead are able to manifest their reikon for a haunting. Living creatures possessed by extraordinary jealousy or rage can release their spirit as an ikiryō 生き霊, a living ghost that can enact its will while still alive.
The most famous example of an ikiryo is Rokujo no Miyasundokoro, from the novel The Tale of Genji.
Yūrei often fall under the general umbrella term of obake, derived from the verb bakeru, meaning "to change"; thus obake are preternatural beings who have undergone some sort of change, from the natural realm to the supernatural.
However, Yūrei differ from traditional bakemono due to their temporal specificity. The Yūrei is one of the only creatures in Japanese mythology to have a preferred haunting time (the hour of the bull, around 2:00-2:30am). By comparison, normal obake could strike at any time, often darkening or changing their surroundings should they feel the need.
Yanagita Kunio generally distinguishes Yūrei from Obake by noting that Yūrei tend to have a specific purpose for their haunting, such as vengeance or completing unfinished business. While for many Yūrei this business is concluded, some Yūrei such as the famed Okiku remain earthbound due to the fact that their business is not possible to complete. In Okiku's case, this business is counting plates hoping to find a full set, but the last place is invariably missing or broken according to the different retellings of the story. This means that her spirit can never find peace, and thus will remain a jibakurei.
Yūrei do not wander at random, but generally stay near a specific location, such as where they were killed or where their body lies, or follow a specific person, such as their murderer, or a beloved. They usually appear between 2 and 3 a.m, the witching hour for Japan, when the veils between the world of the dead and the world of the living are at their thinnest.
Yūrei will continue to haunt that particular person or place until their purpose is fulfilled, and they can move on to the afterlife. However, some particularly strong yūrei, specifically onryō who are consumed by vengeance, continue to haunt long after their killers have been brought to justice.
Some famous locations that are said to be haunted by yūrei are the well of Himeji Castle, haunted by the ghost of Okiku, and Aokigahara, the forest at the bottom of Mt. Fuji, which is a popular location for suicide. A particularly powerful onryō, Oiwa, is said to be able to bring vengeance on any actress portraying her part in a theater or film adaptation.
Okiku, Oiwa, and the lovesick Otsuya together make up the San O-Yūrei (Japanese: 三大幽霊, lit "three great Yūrei") of Japanese culture. These are Yūrei whose stories have been passed down and retold throughout the centuries, and whose characteristics along with their circumstances and fates have formed a large part of Japanese art and society.
The easiest way to exorcise a yūrei is to help it fulfill its purpose. When the reason for the strong emotion binding the spirit to Earth is gone, the yūrei is satisfied and can move on. Traditionally, this is accomplished by family members enacting revenge upon the yūrei's slayer, or when the ghost consummates its passion/love with its intended lover, or when its remains are discovered and given a proper burial with all rites performed.
The emotions of the onryō are particularly strong, and they are the least likely to be pacified by these methods.
On occasion, Buddhist priests and mountain ascetics were hired to perform services on those whose unusual or unfortunate deaths could result in their transition into a vengeful ghost, a practice similar to exorcism. Sometimes these ghosts would be deified in order to placate their spirits.
Like many monsters of Japanese folklore, malicious yūrei are repelled by ofuda (御札?), holy Shinto writings containing the name of a kami. The ofuda must generally be placed on the yūrei's forehead to banish the spirit, although they can be attached to a house's entry ways to prevent the yūrei from entering.
- Bancho Sarayashiki
- Botan Doro
- Hungry ghost
- Inoue Enryo
- Japanese mythology
- Japanese Urban Legends
- Kayako Saeki
- Sadako Yamamura
- Yotsuya Kaidan
- Yūrei zaka
- Davisson, Zack (2014). Yūrei The Japanese Ghost. Chin Music Press. ISBN 978-09887693-4-2.
- Davisson, Zack. "Yūrei Stories". hyakumonogatari.com. Retrieved 20 December 2015.
- Foster, Michael Dylan (2009). Pandemonium and Parade Japanese Demonology and the Culture of Yōkai. Berkeley: University of California Press. ISBN 9780520253629.
- Foster, Michael Dylan (2014). The Book of Yōkai: Mysterious Creatures of Japanese Folklore. Shinonome Kijin. Oakland: University of California Press. ISBN 978-0-520-27102-9.
- Iwasaka, Michiko; Toelken, Barre (1994). Ghosts And The Japanese: Cultural Experience in Japanese Death Legends. Utah: Utah State University Press. ISBN 0874211794.
- Yanigata, Kunio (1970). 定本柳田國男集. Tokyo: Chikuma Shobō.