Ōnyūdō
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Ōnyūdō is a
yōkai are a class of supernatural entities and Spirit (supernatural entity) , spirits in Japanese folklore. The kanji representation of the word comprises two characters that both mean "suspicious, doubtful", and while the Japanese name is simply ...
, or supernatural monster, told about in parts of Japan.


Summary

Their name has the meaning of "big
monk A monk (; from , ''monachos'', "single, solitary" via Latin ) is a man who is a member of a religious order and lives in a monastery. A monk usually lives his life in prayer and contemplation. The concept is ancient and can be seen in many reli ...
", but depending on area, there are various legends where their actual appearance is that of an unclear
shadow A shadow is a dark area on a surface where light from a light source is blocked by an object. In contrast, shade occupies the three-dimensional volume behind an object with light in front of it. The cross-section of a shadow is a two-dimensio ...
, simply a
giant In folklore, giants (from Ancient Greek: ''wiktionary:gigas, gigas'', cognate wiktionary:giga-, giga-) are beings of humanoid appearance, but are at times prodigious in size and strength or bear an otherwise notable appearance. The word ''gia ...
rather than a monk, among others.村上2005年、60-61頁。 The ones that look like a monk (bōzu) are also called ōbōzu. In size, there are those that are about 2 meters tall, to giants that about the size of a mountain.水木2004年、29頁。 There are many legends where ōnyūdō menace people and many legends where those who see one become ill. There are also stories where they are foxes (
kitsune The , in popular Japanese tradition, are foxes or fox spirits that possess supernatural abilities such as shapeshifting, and capable of bewitching people. General overview , though literally a 'fox', becomes in folklore a ' fox spirit', o ...
) or tanuki in disguise, or something that a stone pagoda shapeshifts into, but many of them are of unknown true identity.


Legends by area


Ōnyūdō that inflict harm to people

;Example from
Hokkaido is the list of islands of Japan by area, second-largest island of Japan and comprises the largest and northernmost prefectures of Japan, prefecture, making up its own list of regions of Japan, region. The Tsugaru Strait separates Hokkaidō fr ...
:In the years of Kaei, an ōnyūdō appeared in an Ainu village near Lake Shikotsu ridge and the mountain Fuppushidake. It is said that those who were glared at by its large eyeballs faint as if their "ki" (qi) was touched. ;Example from
Tokyo Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...
:During Showa 12 in the middle of the second world war (1937). People who were sending "red letters" (military summons notices that were red in color) were attacked at the
Hachiman In Japanese religion, ''Yahata'' (八幡神, ancient Shinto pronunciation) formerly in Shinto and later commonly known as Hachiman (八幡神, Japanese Buddhist pronunciation) is the syncretic divinity of archery and war, incorporating elements f ...
level crossing A level crossing is an intersection where a railway line crosses a road, Trail, path, or (in rare situations) airport runway, at the same level, as opposed to the railway line or the road etc. crossing over or under using an Overpass#Railway, o ...
near the
Akabane Station is a railway station in Kita, Tokyo, Japan, operated by the East Japan Railway Company (JR East). Lines Akabane Station is served by the following lines. * Tōhoku Main Line (Utsunomiya Line) * Takasaki Line * Keihin-Tōhoku Line * Shōnan ...
by an ōnyūdō with the appearance of a soldier, and died of an unnatural death 4 days later. It is said that the ōnyūdō's true identity was a
ghost In folklore, a ghost is the soul or Spirit (supernatural entity), spirit of a dead Human, person or non-human animal that is believed by some people to be able to appear to the living. In ghostlore, descriptions of ghosts vary widely, from a ...
of a conscript who committed suicide, or was a soldier who was criticized for his failures and beaten to death by his superiors. Incidentally, it is said that around that area, nobody has received a red letter. :It is an unusual example of a human's spirit turning into an ōnyūdō.


Ōnyūdō that help people

In Azashiro, Takawagawara village, Myōzai District, Awa Province (now Ishii, Myōzai District,
Tokushima Prefecture is a Prefectures of Japan, prefecture of Japan located on the island of Shikoku. Tokushima Prefecture has a population of 682,439 (1 February 2025) and has a geographic area of 4,146 Square kilometre, km2 (1,601 sq mi). Tokushima Prefecture b ...
), by leaving rice in the
water wheel A water wheel is a machine for converting the kinetic energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a large wheel (usually constructed from wood or metal), with numerous b ...
of the creek, an ōnyūdō with a height two jō and eight shaku (about 8.5 meters) would appear, and is said to hull the rice for that person. However, by looking at how the ōnyūdō is hulling it, one would get menaced by it.


Ōnyūdō that animals turn into

;Example from
Iwate Prefecture is a Prefectures of Japan, prefecture of Japan located in the Tōhoku region of Honshu. It is the second-largest Japanese prefecture (behind Hokkaido) at , with a population of 1,165,886 (as of July 1, 2023). Iwate Prefecture borders Aomori Pre ...
:In an oral tradition told in the Shiwa District, Iwate Prefecture, from the "" told by Bokuseki Tamamushi. :At the Kōden-ji at Daijikō field, Tokuta, in the aforementioned district, a mysterious fire would flare up every night in the main temple building, and since a dreadful ōnyūdō would appear from its shadow, a temple supporter was requested to keep night watch. At any rate since it happened every night, people thought of it as suspicious, and it was rumored to have perhaps been a fox or tanuki. :One winter, when light snow was falling one morning, there were footsteps of a weasel coming from the main temple building. After chasing it, since it went below the fireplace in a small neighboring wooden shed, and thus was surrounded by many villagers, and after taking away the fireplace and looking inside, there was the nest of a weasel. The old weasel from the nest was captured and killed. :After that, the mysterious fire and the ōnyūdō did not appear again. ;Example from the
Miyagi Prefecture is a Prefectures of Japan, prefecture of Japan located in the Tōhoku region of Honshu. Miyagi Prefecture has a population of 2,265,724 (1 August 2023) and has a geographic area of . Miyagi Prefecture borders Iwate Prefecture to the north, Akit ...
:At Isedō mountain that once went around Sendai, there was a large rock that made a groaning voice every night. Furthermore, there was a story where it would turn into a towering giant ōnyūdō. :The feudal lord at that time,
Date Masamune was a Japanese ''daimyō'' during the Azuchi–Momoyama period through the early Edo period. Heir to a long line of powerful feudal lords in the Tōhoku region, he went on to found the modern-day city of Sendai. An outstanding tactician, he w ...
, was suspicious of this strange occurrence and made his servants investigate, but the returning servants confirmed that the ōnyūdō certainly appeared and was unmanageable, and everybody turned pale. :Masamune, who had much fortitude, went out to exterminate the ōnyūdō himself. When he arrived, there was a conspicuously large groaning voice, and a nyūdō much larger than usual appeared. Masamune, not being frightened at all, shot an arrow at the foot of the nyūdō, and with an agonizing death cry, the nyūdō disappeared. Next to the rock, there was an otter as big as a calf that was groaning, and the nyūdō was this otter turned into a monster. It is said that after that, this hill was called "unarizaka" (groaning hill). :This "unarizaka" actually exists in Aoba-ku, Sendai city, but on the stone monument that shows the name of this hill, it states that the name came from the groaning voices of calves that carried loads up the hill, which is the more established theory than the yōkai tale.


Other ōnyūdō

;Example from
Toyama Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. Toyama Prefecture has a population of 993,848 (1 January 2025) and has a geographic area of 4,247.61 km2 (1,640.01 sq mi). Toyama Prefecture borders Ishikawa Prefecture to the ...
:In Kurobekyō valley, Shimoniikawa District,
Etchū Province was a province of Japan in the area that is today Toyama Prefecture in the Hokuriku region of Japan. Etchū bordered on Noto and Kaga Provinces to the west, Shinano and Hida Provinces to the south, Echigo Province to the east and the Sea o ...
, 16 ōnyūdō appeared, surprising the visitors of the Kanetsuri onsen who were there for a hot spring cure. It had a height of five to six jō (about 15 to 18 meters), and it is said that it gave off a beautiful seven-colored
aureola An aureola or aureole (diminutive of Latin ''aurea'', "golden") is the radiance of luminous cloud which, in paintings of sacred personages, surrounds the whole figure. In Romance languages, the noun Aureola is usually more related to the d ...
. Since the aureola shares many characteristics as the halo from the
Brocken spectre A Brocken spectre (British English; American spelling: Brocken specter; ), also called Brocken bow, mountain spectre, or spectre of the Brocken is the magnified (and apparently enormous) shadow of an observer cast in mid air upon any type of cl ...
, there is the theory that its true identity was the shadow of the hot spring visitors reflected by the heat of the onsen. ;Example from
Ehime Prefecture is a Prefectures of Japan, prefecture of Japan located on the island of Shikoku. Ehime Prefecture has a population of 1,334,841 and a geographic area of 5,676 km2 (2,191 sq mi). Ehime Prefecture borders Kagawa Prefecture to the northeast, Toku ...
:In the middle of the
Edo period The , also known as the , is the period between 1600 or 1603 and 1868 in the history of Japan, when the country was under the rule of the Tokugawa shogunate and some 300 regional ''daimyo'', or feudal lords. Emerging from the chaos of the Sengok ...
, near the bridge Toyobashi in
Mikawa Province was an Provinces of Japan, old province in the area that today forms the eastern half of Aichi Prefecture.Louis-Frédéric, Nussbaum, Louis-Frédéric. (2005). "''Mikawa''" in . Its abbreviated form name was . Mikawa bordered on Owari Province, O ...
, when a secondhand clothing salesman was on the way to
Nagoya is the largest city in the Chūbu region of Japan. It is the list of cities in Japan, fourth-most populous city in Japan, with a population of 2.3million in 2020, and the principal city of the Chūkyō metropolitan area, which is the List of ...
for business, he encountered an ōnyūdō. It is said to have had a height of one jō and three to four shaku (about four meters), and is thus one of the smaller ōnyūdō. ;Example from
Shiga Prefecture is a landlocked prefecture of Japan in the Kansai region of Honshu. Shiga Prefecture has a population of 1,398,972 as of 1 February 2025 and has a geographic area of . Shiga Prefecture borders Fukui Prefecture to the north, Gifu Prefecture to th ...
:It is written about in the informational miscellaneous records "", from Edo period, in volume sixteen titled "". One autumn night, a large rain fell at the base of
Mount Ibuki is a mountain, on the border of Maibara, Shiga, Maibara, Shiga Prefecture, and Ibigawa, Gifu, Ibigawa, Gifu Prefecture, Japan. It is one of the 100 Famous Japanese Mountains, and is also included on the lists of the 100 Kinki Mountains and the ...
, and the earth shook violently. Before long, an ōnyūdō appeared from the field, and its body was lit left and right under a torchlight while it advanced. :The surrounding villagers were surprised by the violent sound of footsteps, and tried to leave, but the elders of the village were violently held back. Finally, the sound stopped, and when the villagers came out, the grass on the road was completely burned all the way to the peak of the mountain. According to the elders, an ōnyūdō appeared at Lake Myōjin and walked all the way to the peak of Mount Ibuki. Thus it is one of the larger ones among ōnyūdō. ;Example from
Hyōgo Prefecture is a Prefectures of Japan, prefecture of Japan located in the Kansai region of Honshu. Hyōgo Prefecture has a population of 5,469,762 () and a geographic area of . Hyōgo Prefecture borders Kyoto Prefecture to the east, Osaka Prefecture to th ...
:According to the "", in September of one of the years of
Enpō (contemporarily written as 延寳) is the after ''Kanbun'' and before '' Tenna.'' This period spanned the years from September 1673 to September 1681. The reigning emperor was . Change of era * 1673 : The new era of ''Enpō'' (meaning "Prolon ...
, at night in
Harima Province or Banshū (播州) was a province of Japan in the part of Honshū that is the southwestern part of present-day Hyōgo Prefecture. Harima bordered on Tajima, Tanba, Settsu, Bizen, and Mimasaka Provinces. Its capital was Himeji. During th ...
, somebody named Mizutani (水谷) brought along a dog to hunt in the mountain recesses, when he witnessed an ōnyūdō looking like a mountain staring at him. It is said to be so large that it could straddle a mountain (several thousands of meters large). It was rumored to have been mountain god warning against the killing of life. :In the same way, in Sayō District in the same area, in May of one year of
Genroku was a after Jōkyō and before Hōei. The Genroku period spanned the years from September 1688 to March 1704. The reigning emperor was .Titsingh, Isaac. (1834). ''Annales des empereurs du japon'', p. 415. The period was known for its peace and ...
, Heishirō Kajiya would have a net at night, and when he went to the mountain recesses to fish, he witnessed an ōnyūdō about three meters large pull tight on the net from the upper reaches of the river, and Heishirō who held his stomach steady without being startled at all went along, and it is said that the ōnyūdō disappeared after walking several hundred meters. :Also in the Sayō District, when a person name Gosuke Hayase, during the evening when the surroundings have become dark, when he was returning while clinging on someone else to help with the poor visibility, they found an ōnyūdō about three meters large standing in their way, and they ran past it in a rush to escape, but he was then unable to see the person who he traveled with. ;Example from
Kumamoto Prefecture is a Prefectures of Japan, prefecture of Japan located on the island of Kyūshū. Kumamoto Prefecture has a population of 1,748,134 () and has a geographic area of . Kumamoto Prefecture borders Fukuoka Prefecture to the north, Ōita Prefecture t ...
:It is a story from Shimagōko field, Toyono, Shimomashiki District,
Kumamoto Prefecture is a Prefectures of Japan, prefecture of Japan located on the island of Kyūshū. Kumamoto Prefecture has a population of 1,748,134 () and has a geographic area of . Kumamoto Prefecture borders Fukuoka Prefecture to the north, Ōita Prefecture t ...
(now Uki). There is a hill called "Ima ni mo Saka" but in the past, an ōnyūdō would appear surprising passersby. After that, when people would talk about that and pass this hill, it is said that they would hear a voice "ima ni mo (even now)", and the ōnyūdō would appear. This name "Ima ni mo Saka" comes from this ōnyūdō.


Ōnyūdō in festivals

;"Ōnyūdō" of Yokkaichi :In
Yokkaichi is a Cities of Japan, city located in Mie Prefecture, Japan. , the city had an estimated population of 310,259 in 142162 households and a population density of 1500 persons per km2. The total area of the city is . Geography Yokkaichi is located ...
,
Mie Prefecture is a Prefectures of Japan, prefecture of Japan located in the Kansai region of Honshu. Mie Prefecture has a population of 1,781,948 () and has a geographic area of . Mie Prefecture is bordered by Gifu Prefecture to the north, Shiga Prefecture an ...
, in the Yokkaichi Festival performed at Suwa-jinja every year in October, it is known that there is an ōnyūdō festival float (Mie Prefecture Concrete Folk Cultural Property). This is from one of Suwa-jinja's parishioner villagers, Okeno town (now Nakanaya town), but it has been determined to have been made in the years of
Bunka was a after '' Kyōwa'' and before ''Bunsei''. The period spanned the years from January 1804 to April 1818. The reigning emperors were and . Change of era * February 11, 1804 (): The new era name of ''Bunka'' ( meaning "Culture" or "Civili ...
, and as one of the elegances of the religious festivals of the city, it is thought using the characters 大化 to fit the town name of "Oke", it was an advancement of something dedicated to the costume parade "Bakemono Tsukushi" (化け物尽くし), but there is the following folktale that is told. :In the town of Okeno, an old tanuki settled down in the cellar of a soy sauce shop, and laying waste to the agricultural produce, it turned into an ōnyūdō and performed misdeeds like menacing people. The people who were very trouble about this made a doll of an ōnyūdō to oppose it, but the tanuki then became an ōnyūdō that was even bigger than the doll. Then, the people made it so that the neck of the ōnyūdō became flexible, and when the doll and tanuki faced each other for the ōnyūdō showdown, the stretching of the neck was shown. It is said that the tanuki thus gave up here, and ran away. :The ōnyūdō that rides above the festival float about 2.2 meters tall has a body height of about 3.9 meters and a crooked neck with a length of about 2.2 meters before extension, and it is a large mechanical doll that can stick out its tongue and change its eyeball. Imitating this, a paper doll of the ōnyūdō with an extendable neck is also a souvenir of the local area. It is also put out in the citizen festival, the Daiyokkaichi Festival that takes place in August of every year among others, and has become a symbol character of Yokkaichi.


See also

* List of legendary creatures from Japan


Notes


References

* * * * {{DEFAULTSORT:Onyudo Yōkai Mythological creatures Japanese giants