Yokai Encyclopedia

The core of Ukemochi lies in food being narrated not as a clean, finished product, but as something emerging from the body. Welcoming Tsukuyomi-no-Mikoto, Ukemochi does not bring rice out of a storehouse. Turning to the land, boiled rice comes from her mouth; turning to the sea, fish; turning to the mountains, beasts—food generated from the mouth. This is not an act lacking courtesy, but shows that the god's body itself is the food storehouse of the mountains, sea, and land. Food in the natural world, before being arranged into the formats of human kitchens or sacred offerings, exists chaotically inside the god's body. Ukemochi offers this chaotic abundance to her guest. However, Tsukuyomi did not see abundance there; he saw defilement. Food is the most intimate thing that sustains human life, but the moment it comes from the mouth, it takes on imagery of saliva and vomit. Myth does not hide this duality. Tsukuyomi's anger, while unreasonable, reflects the fear that food is inseparable from the body. Against a consciousness that wants to see the blessings of food only as pure offerings, Ukemochi bluntly presents the reality: to eat is inherently to touch other lives and the inside of the body. Therefore, the hospitality of this deity is a blessing, but simultaneously an unbearable proximity. Through murder, the narrative is inverted. When Tsukuyomi strikes down Ukemochi, food does not disappear; rather, it appears as a fixed resource. Cattle and horses form from the crown of her head, millet grows from her skull, silkworms from her eyebrows, barnyard grass from her eyes, rice from her belly, and wheat, soybeans, and adzuki beans from her genitals—food generating from a corpse. This enumeration of body parts assigned to livestock, grains, and sericulture is not merely a grotesque transformation. It gives mythic form to the sensation at the root of agricultural societies—that food is obtained by dismantling the life of the divine. Seeds are not pure abstractions; they come from the side of death. The role of Amaterasu-Omikami is not merely to lament Ukemochi's death. Seeing what Ame-no-Kumahito brought back, Amaterasu receives them as things people will eat to live, dividing millet, barnyard grass, wheat, and beans as seeds for dry fields, and rice as seeds for wet paddies—seeds for dry and wet fields. She further places cocoons in her mouth to draw thread, beginning the path of sericulture. Here, the result of violence is rewoven into the techniques of living by the hands of the sun goddess. Ukemochi's body becomes not just a corpse, but raw materials transferred to fields, livestock, mulberry silkworms, and seasonal labor. Amaterasu is a god who transforms what emerged from death into order. This myth is heavy because the origin of food and the separation of sun and moon occur in the exact same scene. Hearing of Ukemochi's murder, Amaterasu rejects Tsukuyomi as an evil god and refuses to see him again. The *Nihon Shoki* narrates this as the origin of why the sun and moon came to be separated by a day and a night—the reason day and night separated. That is, the establishment of a world where humans eat is also the event where the sun and moon can no longer exist in the same place. The origin of food overlaps with the origin of time. The daily routine of looking at the fields in the morning and the moon at night is a world ordered through the death of Ukemochi. When compared to Ogetsuhime-no-Kami of the *Kojiki*, this difference becomes even clearer. The Kokugakuin University entry for Tsukuyomi notes that while the myth of a food god being murdered is also found in the *Kojiki*, there it is organized as Susanoo killing Ogetsuhime—the pattern of Susanoo and Ogetsuhime. In Susanoo's case, the narrative gravity is on the violence of a rough god and the origin of grains. In Ukemochi's case, because the murderer is Tsukuyomi, the silence of the moon god, the rupture with the sun god, and the separation of day and night are unified. Despite being a similar pattern, the resonance of the myth is vastly different. Ukemochi expands the food myth all the way to the timetable of the cosmos. Therefore, treating Ukemochi merely as a "convenient god who produces food" loses the most important darkness. Ukemochi is a god who narrates that food is always adjacent to death; that before a pure meal, there is the tearing of a body; and that an order is needed to transform that tearing into human living. When rice, millet, wheat, beans, fish, beast, and silk thread are lined up, they overlap with mythological violence and gratitude that cannot be diluted simply by the phrase "I humbly receive this life" (Itadakimasu). Ukemochi bears that overlap entirely upon herself. This is precisely why the food born from the death of this deity does not merely fill the stomach, but becomes the sustenance that supports the very world of humans living between day and night.

A version that preserves only the appearance seen in early modern picture scrolls. Key features are a horse-like face, cloven deer-like hooves, upturned eyeballs, clothing, and a stance with both forelegs braced. No behavior or abilities are recorded. The name is understood as a visual pun on the written word for “baka” (fool), and any allegory remains speculative. Later embellishments are avoided here; description is confined to the iconography.

Umi-zatō survives only as a figure in Edo-period picture scrolls and yokai paintings. No accompanying story explains his nature or actions. The composition centers on a zatō standing upright among the waves, with his biwa and walking staff made unmistakable. The impossible posture—feet planted on a surface that will not stay still—is what makes the image so uncanny. Yokai researcher Kenji Murakami calls Umi-zatō a yokai that exists only in paintings and notes that its imagery may overlap with Umibōzu. Beyond that, the sources do not say whether it brings harm or benefit, nor do they preserve any rite or means of driving it away. Only the visual details are secure; what it does, and how anyone should respond, remain unanswered.

Umibōzu is often understood as a yokai born from the fear and unease of people at sea. It has no single fixed form: sometimes it is no more than a black shadow, while in other stories it rises from the water as a colossal monk. One well-known variant has it draw close to a boat and whisper, “Lend me oil.” If the crew complies, it is said to kindle a fire and sink the vessel. Later variants add different details. Some say it has a collector's habit, gathering wrecked boats and fishing nets and piling them on the seabed; others describe it appearing with a glowing bottle or lantern in hand. It frightens those who meet it, yet it also stands for the unfathomable mystery of the sea and is regarded with awe as well as fear.

A Sea Monk told along the coasts of Kyushu and Shikoku. It appears on boats and asks for a ladle, yet it never climbs aboard from the stern, always emerging at the bow. When it clings to the oar, if the crew keeps rowing, the oar bites in like a blade and it cries out “Aitata!” In Uwajima, many tales say it harms people, yet those who see a Sea Monk are also said to live long lives.

A sea monk told across the Chugoku region. In Nagato it appears to snuff out watch fires, while in Okayama’s Bisan Seto it is called “Nurarihyon,” taking a bead-like form to bewilder people. Along the San’in coast it clings to beachgoers and tries to pull them into the sea. The Tottori collection Inaba Kaidan-shu recounts a one-eyed, post-like sea monk that torments people with its slick, slimy body.

The true identity of Umisachihiko is Hoderi-no-Mikoto, the protagonist of the final section of the upper volume of the Kojiki and the tenth section of the Age of the Gods in the Nihon Shoki (also known as Honosusori-no-Mikoto in the Nihon Shoki). Born in a fire, he is the eldest of three sons of Ninigi-no-Mikoto (the Heavenly Grandson) and Konohanasakuya-hime (daughter of Oyamatsumi-no-Kami). The middle son is Hosuseri-no-Mikoto, and the youngest is Hoori-no-Mikoto (Yamasachihiko). The prefix "Ho" (fire) in all three names stems from the myth that their mother gave birth in a blazing delivery room to prove her purity after a single night's conception. The name "Hoderi" means the most intense stage of fire, while "Honosusori" similarly implies the height of flames. The common name "Umisachihiko" is an occupational title meaning "the male deity who presides over the bounties of the sea," indicating his role as a god of fishing. The core of his story lies in his position as the older brother in the myth of Umisachihiko and Yamasachihiko. Umisachihiko presided over the sea's fish, while Yamasachihiko presided over the mountain's game, each making a living with their respective tools. One day, Yamasachihiko exchanged tools with his brother and went to the sea, but lost the fishhook. The older brother strictly refused, saying, "Return the original fishhook, I will not accept any other," and even rejected a thousand replacement hooks. Yamasachihiko then went to the sea palace of Watatsumi, received the tide-flowing and tide-ebbing jewels, and returned to hand back the hook while chanting a curse. Thereafter, Umisachihiko gradually became impoverished. Holding a grudge, he attacked Yamasachihiko, but Yamasachihiko used the tide-flowing jewel to drown him, then used the tide-ebbing jewel to save him when he begged for his life. By repeating this, he forced Umisachihiko into submission. Umisachihiko finally swore to serve Yamasachihiko eternally as a "person of wazaogi" (entertainer). It is one of the most dramatic sibling tales in the Kojiki and Nihon Shoki, epitomizing ancient curse culture, divine manifestations, and submission rituals. Umisachihiko is positioned as the ancestral deity of the Hayato people in southern Kyushu. The Hayato were indigenous people living in ancient Satsuma, Osumi, and southern Hyuga, who served the court as guards, ritualists, and performers under the Ritsuryo system. The myth of his submission created a decisive asymmetrical structure: Yamasachihiko became the grandfather of Emperor Jimmu (the direct ancestor of the imperial line), while Umisachihiko became the ancestor of the subjugated border people. This is academically interpreted as the political mythologization of the 7th-8th century Ritsuryo state's subjugation of southern Kyushu. The "Ashiura" gestures Umisachihiko made while drowning—rubbing his feet, chest, and cheeks—are said to be the origin of the Hayato-mai, a court ritual. The Hayato-mai was a dance performed by the Hayato for the emperor during the Daijosai, Niinamesai, and New Year ceremonies. The Engishiki records its movements, which are partially inherited by the modern Imperial Household Agency. Thus, his submission myth functioned as the mythological basis for ancient Japanese court rituals. The center of his worship is Ushiodake Shrine (Kitago, Nichinan City, Miyazaki), the only shrine nationwide where he is enshrined as the primary deity. It is said to be located where he arrived after losing to his brother, symbolizing the localization of his legend. The fact that the shrine is located in the mountains, away from the sea, reflects the folklore interpretation of Umisachihiko being "driven into the mountains as a loser" and the geographic distribution of Hayato clans. The asymmetry between Yamasachihiko being enshrined in three major shrines and Umisachihiko in only one vividly reflects the myth's dominance/submission structure in shrine worship. In folk belief, he is deeply worshipped as a local guardian of fishing, maritime transport, and Hayato-lineage clans, especially in southern Miyazaki and Kagoshima. Modern discussions re-evaluate his "tale of the loser," deconstructing the central vs. border dichotomy. In pop culture, he frequently appears alongside his brother as the tragic older brother.

This version is grounded in Toriyama Sekien’s illustration and notes, emphasizing its link to the concept of the demon-revealing mirror. Faces of the uncanny appear on the surface, not necessarily reflecting an external yokai but a spirit residing within the mirror itself. In the lineage of tsukumogami tales, it accords with the belief that long-used implements gain numinous life, sometimes changing mood according to how their owner treats them. Relying on early modern woodblock-book imagery, it has few concrete encounter or harm narratives, and is mostly told in general ghost-story frames such as glimpsing a strange visage when peering into a mirror in a dim room at night. Later depictions of raccoon-dog forms or showy powers are traced to films and children’s books and are set apart from the classical image.

A codified image of the classic Ushi-no-koku mairi centered on Edo-period etiquette. Clad in white burial garb with disheveled long hair, the practitioner inverts an iron trivet as a crown with three candles lit, hangs a mirror on the chest, and moves toward the shrine on single-toothed geta to muffle steps. At the sacred tree, a doll bearing the target’s name is pinned and a five-inch nail is hammered in each night. The witching hour is strictly the third quarter of the Ox Hour, with fulfillment said to come on the seventh night. If witnessed, the rite loses its power, so silence and care to leave no tracks are prescribed. In art, a black ox sometimes accompanies the figure; lore holds that straddling it on the final night brings success, while shrinking back means failure. Straw-doll usage became common in the early modern era, with roots in ancient scapegoat effigy piercings and Onmyodo katashiro rites. Folklore often stops short of asserting curses as real, instead telling that breaking taboos or exposure nullifies the act.

Edo-period picture scrolls and modern yokai encyclopedias often give Ushi-oni its best-known form: a sea demon with the head of a bull and the body of a spider. The image joins a primal fear of dark, deep water to the spider's refusal to release anything caught in its web. Cattle were closely bound to farming and water control in older Japanese life, and could be revered as sacred animals, messengers of a water deity, or divine beings in their own right, as in the case of Gozu Tennō. One influential interpretation therefore sees the Ushi-oni lurking in a deep pool as the fallen form of a violent water deity—a power once worshiped and feared that became a yokai as its cult declined. This is no mindless beast. Ushi-oni can supposedly kill a person merely by licking their reflection, and it uses Nure-onna as bait before striking at a vulnerable victim. Such arbitrary, absolute power retains the character of a dangerous deity. Its resentment is strong enough to keep a severed body part moving, leaving an ordinary person almost no hope of resistance. People instead appealed to higher Buddhist powers such as Senju Kannon, or brought Ushi-oni itself into a festival at the head of the mikoshi procession. Properly received as an aramitama—a rough and violent divine spirit—its ferocity could be turned toward defending the town from other evils.

A type shaped by Edo-period print culture, centered on Sekien’s imagery and the psychologized readings in kyoka verse. Rather than a concrete monster, it personifies the feeling of being held back by a tug at one’s trailing hair, dulling decisions through interference from behind. Mizuki Shigeru cites tales from the Tsuyama area that give it a corporeal aspect—ruffling a woman’s hair, breathing hot air—but in all cases it touches from behind and stirs hesitation. It is often grouped with hesitation-inducing yokai such as Okubyogami, Sodehiki-kozō, and Furifuri. Though there are notes of it being enshrined in Ise, specific rites are unknown, and it appears mainly in moral and didactic contexts. Stories survive in both urban and local settings, yet no clear lineage of deity name or object is shown, with wordplay and the concretization of psychology driving its transmission.

A cove in southern Sado preserves the story of an old woman who rises from the sea. She appears at dusk, when the weather is breaking and darkness settles over the water. Her skin is pale, and she holds both hands behind her back as though carrying something, but the original account never says what the burden is. People around Shukunegi said that Usuoi-baba appeared only once every two to five years. Seeing her was not thought to bring illness or immediate shipwreck, and no tale has her lure or devour anyone. Modern yokai encyclopedias often place her beside Iso-onna and Nure-onna, but she is better understood as an apparition associated with poor fishing or a sudden change in weather. The name Usuoi-baba is rarely recorded outside this local body of ghost stories and may have belonged to Shukunegi alone.

A reconstruction based on Edo-period yokai picture scrolls. Depicted with a humanlike face marked by iron-blackened teeth, raising a three-fingered hand, appearing from behind fences or in ruined houses and shouting “uwan.” No early sources clearly state direct harm to people; its main behavior is appearing and intimidating. Because of similar regional names and frequent mansion backdrops, it is sometimes taken as a house-dwelling entity, but this is unproven and the portrayals are spare. Later creative tales—such as being driven off by a retort or killing victims—should be treated separately from the core record.

A reconstruction based on imagery from picture scrolls. It kneels low to the ground, the body slack, skin ashen-brown mottled with pale spots. The face is indistinct, the line between mouth and nose blurred, with a damp sheen. In keeping with rare records that preserve little more than its name, no guiding motive is assigned. Said to be seen as a crouching lump by mountain paths or along thickets, it inspires awe and a sense of distance. If approached, it withdraws before its form can be fixed, making pursuit difficult. No confirmed harm is attributed to it, and encounter tales remain general.

A reference version reconstructed from 18th–19th century yokai picture scrolls that depict the figure without commentary. Only the massive upper body of a beast is shown, bearing large single hooked claws on each forelimb. Color varies by example from dark green to earth tones, with some renderings appearing amphibian. The name is associated with a word meaning fear and is set alongside Otoroshi in works like Hyakkai Zukan and Gazu Hyakki Yagyo. No behavior, ecology, or moral alignment is recorded, presenting it merely as an eerie presence of the mountains. Concrete folk traditions remain unknown, and later embellishments are excluded for lack of sources.

The true nature of Wakumusubi-no-Kami becomes visible not by viewing him as a frontline food deity, but as the underlying power that gives birth to food deities. In the *Kojiki*, when Izanami-no-Kami gives birth to Hinokagutsuchi-no-Kami, gets burned, and lies ill, Mitsuha-no-Me-no-Kami and Wakumusubi-no-Kami are formed from her urine—Wakumusubi-no-Kami formed from urine. Here, gods do not descend from a pure sky. They arise from places close to life crises and impurity—burns, illness, and urine. Therefore, Wakumusubi-no-Kami's generative power is from the outset earthy, bodily, and close to agriculture. The name "Waku" carries youthfulness. Using the *Nihon Shoki*'s character for "young" as a clue, Kokugakuin states that Waku means young and considers "Musuhi" to be the same word as Takamimusubi-no-Kami and Kamimusubi-no-Kami. *Musuhi* is the power to generate, tie, and form things. If Takamimusubi-no-Kami and Kamimusubi-no-Kami are *Musuhi* close to the beginning of the universe, Wakumusubi-no-Kami is a young *Musuhi* standing in the scene where Izanami-no-Kami's body breaks down. Creation restarts not from completed order, but from the bottom of a wounded body. That this deity is formed from urine is not merely a bizarre birth. Through the eyes of agriculture, urine and feces become fertilizer, water becomes irrigation, and fire leads to slash-and-burn farming and soil renewal. Kokugakuin introduces a theory viewing it as youthful agricultural productive power being born from receiving fire, fertilizer, and water, as well as a theory viewing it as a reflection of slash-and-burn agriculture—agricultural productive power born from fire, fertilizer, and water. In this reading, Wakumusubi-no-Kami is not a deity who avoids impurity, but one who transforms impurity into crops. He can be said to be an existence that mythologizes the cycles at the base of life. The *Nihon Shoki*'s Wakamusuhi demonstrates this character more concretely. Wakamusuhi is born between Kagutsuchi and Haniyamahime, and silkworms and mulberries grow on its head, and the five grains in its navel—Wakamusuhi harboring sericulture and the five grains. Being born from the fire god and the earth goddess is also agricultural. The burning fire, the receiving earth, and the mulberry, silkworms, and five grains arising from there. While this differs from corpse transformation after murder like Ukemochi-no-Kami or Ogetsuhime-no-Kami, it shares a mythic sensibility that the source of food and sericulture dwells in body parts. Wakumusubi-no-Kami is the generative power at the preliminary stage of food origin myths. The relationship with Toyoukebime-no-Kami firmly ties Wakumusubi-no-Kami to the genealogy of food deities. Kokugakuin's entry on Toyoukebime-no-Kami describes her as the child deity of Wakumusubi-no-Kami and explains that "Uke" means food or rice. Toyoukebime-no-Kami is an important name when considering the later Toyouke-no-Okami faith, connecting to the realms of sacred offerings, food, and the rice spirit. As her parent deity, Wakumusubi-no-Kami does not become food himself, but bears the root function of making food form. Before the dining table is the rice paddy; before the rice paddy are water, fertilizer, and fire; and deeper still in myth stands Wakumusubi-no-Kami. This deity also draws in readings related to water. Being formed from urine, the water goddess Mitsuha-no-Me-no-Kami being formed from the same urine, and the association of "Waku" with "springing forth" (waku) lead to theories surrounding the gushing of hot and cold springs—relationship with spring water and hot springs. Just as volcanic activity shows fire and water simultaneously, in myth too, water and generative deities appear immediately after the birth of the fire god. Water and productive power emerge from a body burned by fire. This reversal well expresses the ancient sensation that resources supporting life appear after calamity. In reading Wakumusubi-no-Kami, brevity of appearance is not a flaw. Rather, overlapping within the short description are the birth of the fire god, the death of Izanami-no-Kami, deities from excretions, Toyoukebime-no-Kami, the five grains, sericulture, slash-and-burn farming, water, and fertilizer. He is not a deity who shouts as a protagonist of a story, but one who connects multiple myths in the background. If Ukemochi-no-Kami and Ogetsuhime-no-Kami show that "food comes from the body and death," Wakumusubi-no-Kami declares that "the generative power to produce that food arises young from the depths of impurity." Therein lies the depth of the name "Young Generative Spirit" (Waku-musuhi).

An interpretation grounded in Toriyama Sekien’s depiction. On night roads and at crossroads, a blazing wheel cruises low to the ground, its axle set with a monk-demon mask that fixes passersby with an unblinking stare. Meeting its gaze or succumbing to fear is said to drain one’s vital spirit, leaving the victim stupefied. Its origins trace to Kyoto wheel-ghost tales and likely overlap with the katagiriguruma motif, yet Sekien adopted a nyūdō mask and fixed it as a male figure. The source is uncertain, defying a firm label as vengeful spirit, tsukumogami, or will-o’-the-wisp. Countermeasures include posting a paper charm reading “This is the village of Katsumo” at the doorway, or avoiding eye contact and hiding. Few variants name specific places or people; the core image remains a plain yokai preserved in classical records.

The *Warei* is an entity that embodies the dynamics of *goryo* belief—where a vengeful spirit transforms into an honorable spirit (*goryo*) and then into a guardian deity—within the early modern history of Uwajima. In life, Yamaga Seibee was a retainer who devoted himself to the reform of domain administration. His unnatural death (the Warei Disturbance) and the subsequent chain of lightning strikes and shipwrecks that struck the participants gave people a tangible sense of a curse. The spirit, initially enshrined out of awe and fear, reversed its nature when his innocence was publicly recognized, acquiring the divinity of 'Warei-sama' protecting fishing and industry. The herd of *Ushi-oni* that parades in the Warei Festival at Warei Shrine is a ritual device to comfort and pacify this *goryo*, showing how monsters (*ushi-oni*) and spirits (*warei*) are inextricably linked in Uwajima's festivals.

In this version, we read Watanabe no Tsuna as "the boundary warrior who severed the demon's arm." What etched Tsuna's name most strongly in history is the story of him encountering a demon at Rashomon or Ichijo Modoribashi and cutting off its arm. It is no coincidence that the location is a gate or a bridge. A gate divides the inside and outside of the capital, and a bridge connects this shore and the other shore. The demon appears precisely at that boundary. Tsuna's bravery does not completely erase the demon with a single stroke. He can sever the arm, but the demon itself escapes. The remaining arm is both a trophy and evidence that the anomaly has not yet ended. Here lies the fascination of the demon arm tale. The severed arm enters the mansion as an object and is placed under human management, but the demon returns to the human world to take it back. The revisit by the demon disguised as an old woman reveals Tsuna's weakness. He is excellent in martial force, but he finds it hard to lose courtesy toward an opponent taking the form of a relative. The demon strikes at that point. In yokai subjugation tales, the insight to see through anomalies is just as important as martial power. While Tsuna succeeded in cutting the arm, he cannot completely fend off the disguised demon. This imperfection makes him a human-like hero. As one of Yorimitsu's Four Heavenly Kings, Tsuna also occupies an important position in the Mt. Oe subjugation. In his solitary tale, he slashes the boundary demon; in the group tale, he heads for Shuten-doji under Yorimitsu's command. In other words, Tsuna is the figure who connects individual bravery with team demon subjugation. His blade participates in both one-on-one anomaly events and grand subjugation narratives. This version of Tsuna stands between victory and letting the enemy escape. The scene of cutting the demon arm is vivid, but the development of the demon reclaiming the arm shows that anomalies cannot be simply sealed away. Even if the monster is slashed at the boundary, the monster returns inside the house, into the form of a relative, into memories. Watanabe no Tsuna's story simultaneously tells of the exhilaration of demon subjugation and the tenacity with which demons still infiltrate the human world. The demon arm is an object that has crossed boundaries. The moment it is detached from the demon's body, it remains a part of the otherworld while being kept in a human mansion. Tsuna holds the arm as proof of victory, but that arm also serves as a beacon for the demon to return. The trophy is simultaneously a cursed object. The demon disguised as an old woman attacks Tsuna's humanity. A warrior is strong against demons, but cannot discard courtesy toward relatives. Here the story shifts from a contest of strength to a contest of perception. If he knows it is a demon, he can slash it. But when the demon borrows a family member's face, a person cannot easily swing a blade. This version of Tsuna is not a flawless subjugator, but a hero who wins at the boundary and wavers inside the house. That is exactly why the folklore gains depth. Demon subjugation does not end outside; it starts over once back in daily life because of what was brought back, the person trusted, and the seal that was opened. Tsuna's charm lies in his nature as a warrior that includes this wavering. If he were simply strong, the ghost story would end quickly. But he is strong, and at the same time, deceived. Therefore, the story moves from a single stroke of the sword to a conversation in the mansion, deepening from external demon subjugation to internal suspicion. That lingering resonance keeps Tsuna's martial valor from being just a simple victory tale.

A traditional reading grounded in the side-by-side entries of the Testament Ghost and the Water-Begging Ghost in Ehon Hyaku Monogatari. The spirits of those who died with last words unspoken or burdened by thirst appear at night to plead for water. Individual names and deeds are seldom told; instead they serve as moral parables urging memorial offerings. When monks chant sutras, perform memorial services, feed hungry ghosts, or make alms to the dead, their thirst is said to be soothed with the symbolic “sweet dew” described in scripture. Told in both towns and villages, they appear where people and water meet—by wells, bridges, graves, and roadsides. They stir pity more than terror, and tales warn that rough treatment brings a curse, while respectful rites lay them to rest.

A representative form from the Tokaido’s Sayo no Nakayama. The spirit of a pregnant woman murdered on her journey is said to have possessed a stone and cried each night for her unborn child. People performed memorial rites, and in time the spirit was soothed. Folklorically, it is tied to roadside memorials, Koyasu child-protection faith, and the erection of stone steles, reflecting an older belief that spirits dwell within stones.

This version turns to how the Yako was spoken of in the Buddhist world, and in Zen in particular. Zen has the term yako-zen, "wild-fox Zen." It is a word of admonition for a half-finished state in which one has not truly attained enlightenment yet believes oneself enlightened. Its source is the famous tale "Hyakujō and the Wild Fox," recorded in the Song-dynasty Zen collection of dialogues, the Mumonkan. An old man came to listen each time the Tang Zen master Baizhang Huaihai (Hyakujō Ekai) preached. One day the old man revealed his story. Long ago, when he had been abbot of this very temple, he was asked whether one who has attained enlightenment still falls subject to cause and effect (karmic retribution), and he answered, "He does not fall (into cause and effect)." For that single mistaken word he had been cast into the body of a wild fox through five hundred rebirths. The old man begged Hyakujō for the correct answer. When Hyakujō rephrased it as "He does not obscure cause and effect," the old man was freed of his delusion on the spot, shed the wild-fox body, and attained buddhahood. Here the wild fox becomes a symbol of admonition—the form into which one who has fallen into half-baked enlightenment is transformed. Quite apart from the village field fox that deceives people, the Yako has lived on at length within the language of Zen as well, as "where shallow cleverness ends up."

Yamabiko is the personification of echoes in the mountains, interpreted as a kodama or a retainer of the mountain deity. Its habit of repeating words back is seen as a boundary-marking reply within the mountain domain, warning against reckless shouting that disrupts the mountain’s vital energy. Early modern images depict it as a small beast akin to a dog or monkey; figures in Hyakkai Zukan and Gazu Hyakki Yagyō have been linked to the yama-ko in Wakan Sansai Zue and to Penghou, said to dwell within trees. Depending on region, intermediaries vary—bird calls like the yobukodori or resonant rocks such as “Yamabiko Rock.” Phenomenon, spirit, and monster imagery overlap in layered tradition.

This version builds on a record narrative centering on the Miyoshi anomalies of Kan’en 2. The chieftain declares himself in samurai guise at the close of the thirty days of hauntings, mentioning a wager with Kamino Akugorō. He states he is neither tengu nor fox spirit, yet some paintings depict him as a three-eyed crow-tengu, revealing a gap between text and image. Across manuscripts his name varies—Yamamoto Gorōzaemon, Yaman-moto Gorōzaemon, Yamamoto Tarōzaemon—and in alternate strands he bestows different gifts, such as a mallet or a scroll of rites. Around Miyoshi, multiple “trial of the brave” tales persist, sharing a sequence of fixed-term hauntings, the master of the house remaining unshaken, the leader’s appearance and words of praise, and a token left upon departure. His concrete nature and origin remain unsettled, while his role as a demon-king-like commander is emphasized. Given differences among early modern essays and picture scrolls, proper names and details should be treated as variant by text.