Yokai Encyclopedia

Based on Toriyama Sekien’s imagery, this version foregrounds the character of a page serving the Rain Master. It appears with a Japanese umbrella stripped of its ribs worn like a hood and a lantern in hand. Its origins lie more in printed books than in oral folk tradition, and in yellow-covered comic books it shows up as a menial helper. The ideas of rain and service to nobility converge, shaping it as an attendant akin to small child-deity retainers. It does not wield an explicit divinity that summons rain, remaining subordinate to a being that governs rain’s power. Depictions vary—one eye, hat, lantern—depending on period and source, with no single fixed image. Lacking a known local provenance, it spread notably through Edo’s publishing culture.

A red-haired apparition said to appear in the fields and hills of Katsugase in Tosa Province. It walks upright like a human, yet hides among tall bamboo grass and reeds, making its full form elusive. Its most striking trait is hair that shines like the sun; approaching and staring directly at it is said to dazzle the eyes and cause temporary visual impairment. Tales rarely attribute malice to it, focusing instead on discomfort caused by its visual impact. It is named in the late Edo to early Meiji Tosa Bakemono Picture Book, listed alongside local figures such as the Laughing Woman of Yamakita and the White Crone of Motoyama. The “Aka-gashira” in Hyakki Yagyo picture scrolls is sometimes cited as iconography, though identification remains cautious. Sightings are told of at dusk through dawn in the open country and survive mainly in local oral tradition.

Rather than a physical substance, the reviving incense is told in narrative tradition as a medium for reunion with the dead. The Chinese motif of seeing a figure within smoke was adopted into early modern Japanese literature and theater, where the handling of censers, incense wood, and ash is rendered with ritual care. In yokai picture compendia it sometimes appears as a type of tool-born apparition, with set-piece depictions of a visage forming in the incense smoke. It is often interpreted not as recalling a spirit itself, but only as manifesting a semblance or shadow. Medicinal virtues are mentioned as apocrypha in materia medica, yet Edo-period notes record skepticism and file it among curious tales. In Kamigata and Edo rakugo, a tryst lasts only until the incense or stick burns out, making the quantity and duration of incense a key stage device.

Based on the belief that tools become spirited after a hundred years, this yokai is depicted with an old iron cauldron for a head. It lingers in the night, issuing faint tremors and steam that produce low sounds. The ringing is read as an omen of fortune or misfortune, falling silent if met with careless clamor, and responding when approached with reverence. It embodies divinatory function and the memorial veneration of well-used objects.

This form gathers traditions in which a Dragon Maiden approaches a traveler or fisher beside the water. She first speaks as a human woman and asks for an offering or a promise. If the agreement is honored, she holds back floodwater and draws shoals of fish. If it is broken, she answers with a muddy torrent or a violent wind. Ryūjo is not opposed to the gods or to Buddhism. At rainmaking rites she may herself be treated as a dragon deity. She changes freely between woman and dragon, yet her body leaves clues: scales, claw marks, an uncanny fragrance, or the touch of garments that remain damp. The Dragon Maiden is not one named being belonging to a single locality, but a figure shared by many stories of water. She gathers water's two natures into one woman—nourishing life when calm and destroying an embankment when angered. The way to live beside her is not to conquer her, but to respect the water and fulfill the covenant made at its edge.

Known as the King of the River, Daisuke of the Salmon marks forbidden periods and seasonal rites during the salmon run. On set dates—such as the fifteenth of the Frost Month and the twentieth of the Twelfth Month—Daisuke and his consort Kosuke are said to proclaim in loud voices. Anyone who directly hears them dies three days later, so riverside communities kept those days as no-fishing days, ringing gongs, singing, and pounding rice cakes to block out the sound. In tales along the Shinano River, a powerful elder who forces taboo-breaking meets a water authority in the guise of an old woman and dies suddenly with the run’s onset, embodying awe of nature and adherence to proper conduct. The old woman is read as a personified river spirit or Daisuke’s avatar, though never revealed outright. The name varies between “Daisuke of the Salmon” and “Daisuke the Salmon,” and his wife is called Kosuke. Recorded from the early modern period in surveys and folktale collections, this motif spreads across the salmon culture zone of eastern Japan beyond specific locales. Creative variants are few, and the core points—voice, dates, taboo, and fatal retribution—remain consistent.

This is an interpretation of the "apex predator of the sand sea that attacks upon detecting vibrations," burned into the minds of modern people through games and fantasy works. The Sandworm in this version lacks sight; instead, it acutely senses the slightest "footsteps (vibrations)" of humans walking on the surface, embodying the ultimate panic horror as it suddenly opens its massive jaws from underfoot to swallow its prey whole. Speaking of Japan's indigenous subterranean anomalies, there are the "Giant Catfish (Oonamazu)" and "Giant Earthworm" that cause earthquakes, but while they are symbols of "the disaster itself," the Sandworm is strictly set as a "creature reigning at the apex of a harsh ecosystem," reflecting the rationalism of an imported monster. Layers of sharp concentric fangs, an armor-like hard body surface, and overwhelming mass that even swords and magic (or modern weaponry) cannot penetrate. It is the crystallization of the unfathomable terror and romance that the Japanese, living in an island nation surrounded by the sea, harbor toward the "endless desert" they have never once stepped foot in. Precisely because it lacks the background of a local indigenous spirit, it continues to evolve and grow larger in new creative works today as a purely "desperate foe in the struggle for survival."

A figure based on local lore in which death-spirits amassed at a burial ground (zammai) congeal and manifest as a single monster. In Toyama it appears as a humanlike specter that performs ominous signs, while in Ishikawa it is feared as a giant priest-like ogre. It is bound to human life, death, and the order of funerary practice, often marked by nighttime sounds and prescribed etiquette. Widely said to be unable to cross running water, a belief linked to folk practices of digging trenches around the zammai. Its form and stature are not fixed and vary with the density of gathered spirits. Folklore records note collections from the early Showa era, with regional spellings such as “Zammai” and “Zanmai.”

An image based on folk belief that crabs with human-like patterns on their carapaces washed up on Sanuki shores embody the vengeful spirits of the defeated Taira clan. Historical sources tie these crabs to various locales, with Sanuki famed due to memories of the Battle of Yashima. As a yokai, it is said not to harm people directly, but to make onlookers recall the karma of the battle and feel awe. It is distinctly linked with acts of memorial service and consolation for the dead, and differences from other regional names are considered nominal only.

Based on the Noto region’s distinctive image of the saru-oni. It has an ape-like body crowned with a single horn and dwells in rock caves, menacing livestock and people near settlements. It appears under cover of night and is feared as a boundary breaker between the mountains and the village. Communities sought the protection of local tutelary deities, and tales of subjugation by bow and arrow are tied to place-name origins. After its defeat, its horn is said to have been enshrined, and memorial shrines were established, pairing awe with appeasement. The saru-oni is told as a singular creature rather than a pack. Its range centers on cave mouths and the satoyama borderlands, its presence marked by a bestial stench and legends of black blood.

Said to be a female great serpent dwelling in the pond of Chokeiji in Izumi Province. Leading many snakes, she was styled the “Serpent King,” quietly watching over people near the temple grounds. Around the Bunsei era, she fell for the beauty of the abbot, Zen monk Shoyama, and slipped into the temple disguised as a lost woman. Sensing something amiss, the abbot struck her with a blade. As she lay dying, the serpent vowed to protect Chokeiji. Thereafter the pond became a place of memorial offerings and reverence, tied to taboos against harming snakes and to prayers for rain and abundant harvests. The origin of her title and its rank remain unclear, likely influenced by regional worship of serpent kings (Ja-o, Ja-o Gongen). Though the pond was later filled in and no visible remains survive, her image endures in local oral tradition and temple lore.

Shichihiro Nyōbō is a giant-woman tale widely told in Izumo, Oki, and Hōki, appearing at boundary places such as mountain paths, riverbanks, and shores. Her form shifts by locale: in Ama on Oki she is a wild-haired mocker who hurls stones, along the Shimane coast a sea-wind woman flashing blackened teeth, in Yasugi a beggar beauty trailing a long robe, and in Hōki a pallid grinder-woman who sharpens while singing grain songs. Common threads are excessive length of body or neck and the way laughter, gestures, or song serve as lures. In banishment tales, sword wounds link to petrification, with odd stones, mounds, or ancient trees named as origins, and some lineages claim heirloom swords or tack from these encounters. The cycle is not pure horror; beauty, begging for alms, and the humble fear tied to the sound of grinding grain mingle together, encoding folk lessons about handling boundary anxieties: do not meet the gaze, do not answer voices, avoid night roads. It is comparable to early modern long-faced demon-maidens, yet Shichihiro Nyōbō is marked by ties to local sacred landscapes of mountains and coasts.

Based on the account in Kabhiko, it is framed as a small dragon-serpent linked to a manor in Kyoto’s Higashiyama. It resembles a dragon yet is not deified, lurking beneath the soil and under stones, and manifests alongside ominous signs such as withering garden trees and cracked garden stones. Its defining trait is an extreme toxicity said to kill within moments of a bite, echoing ancient lore and fear of deadly vipers. Sightings are rare, with tales in which swarms of strange snakes appear first, and at the end the Seven-Step Viper reveals itself as the true body. It bears four legs, upright ears, and red scales edged in gold—colors read as both auspicious and baleful—and is often taken as a sign of a household’s decline or a disturbance in the land. In folk practice it is tied to neglected stones on mountain skirts and old gardens, and locals would pray before moving stones to avert calamity.

The image of the Kage-onna traces back to Sekien’s prints and has been understood as a “woman of shadow alone,” appearing where houses meet moon-cast light. In early modern homes, shoji and wooden doors let light pass, creating a boundary between outside brightness and interior dimness where a woman’s outline emerges. Lore says her visit is fleeting, more a portent of household unrest than a threat. Whether she is the shadow of the living or a trace of the dead is uncertain, and she is sometimes linked to family misfortune or the mood of the local deity. Proper conduct is to refrain from pursuit, lower the fire, close the doors, and speak no words. The next day, households often cleanse the well, garden trees, and crawlspace, seeking rites to calm the omen. The shadow makes no footsteps and shifts its shape in the wind. Dogs and cats are said to react keenly, yet harm is rarely told, and she seldom lingers.

Reconstructed around the conceptual yokai image based on Sekien’s illustration. Shindanda does not fix its form, appearing as a presence in lonely places or as something at one’s back. It brushes a person’s collar, sending a chill that freezes the heart and guts. Its alternate names, “Coward-Spirit” and “Zozogami,” personify the psychological and physiological reactions that arise on battlefields or night roads, reflecting a premodern view that treated the signs of fear themselves as a kind of possession. Specific methods of exorcism are not standardized; folk practice records distractions such as fire, light, or traveling with companions, but no systematic rite is known. Lacking a physical body, it is rarely a target for capture or slaying, and has been explained mainly as the cause of chills and gooseflesh that overtake the mind and body.

A baseline profile of Shidaidaka as a roadside, look-up-type apparition recorded across the Chugoku region. It resembles a human silhouette with head and shoulders dissolving into darkness, and its height stretches or shrinks in response to one’s gaze. Harmfulness varies by tale, but fear intensifies through the act of looking up. Countermeasures include keeping your gaze lowered, watching the ground, or peering between your legs, which causes the figure to diminish and dissipate. It is linked to the Mikoshi-nyudo, and tales of the similarly named “Shidai-zaka” are viewed as slope or mountain-path variants. Hunter stories connect it with the nekomata, and identifications differ by locale. Creative embellishments are common, but the core taboo warns that one’s gaze amplifies the phenomenon.

This form of Shiranui appears in ordered ranks before dawn on the first day of the eighth lunar month. Several kilometers offshore, one or two reddish lights first emerge. Coastal people call them oyabi, the 'parent fires.' They split to either side, producing more and more 'child fires' until hundreds or thousands form a single band across the sea. Tradition lets the line extend four to eight ri, roughly sixteen to thirty-two kilometers. It is almost invisible from a beach close to the water but clear from a headland or rise about ten ken above it. Around the deepest ebb of the tide, the lights settle into their most regular pattern, flickering behind the waves like the scales of a submerged dragon. The fires retreat when chased and draw away when a boat comes near. Anyone who tries to capture them sees both light and reflection slip aside, leaving only a direction back toward shore. An old account says that such a parent fire appeared when Emperor Keikō's vessel was surrounded by darkness and turned its prow safely landward. Coastal communities therefore treated the flame whose maker no one knew with reverence. On the night of Hassaku they stopped their nets, rested their oars, and waited for the line to come apart. Although the parent fires are sometimes linked with the presence of a violent dragon deity, they are not said to delight in harming people. Their lesson is against arrogance and haste. A boat intent on quick profit may wander among the lights and finally be forced to furl its sails. Someone who listens to the tide instead climbs a shore pine, studies the rhythm of the flames, and leaves quietly through a break in the line. The shoals then prove unexpectedly calm, and on the return journey a last light may sway against the shore as though welcoming the boat. Villagers call the display Thousand Lanterns or Dragon Lanterns and press their hands together. If people shout its name crudely or mock it, the ordered lights scatter at once into sea fog. Wind does not feed Shiranui as it would an ordinary flame; the lights grow and diminish only with the pulse of the tide. That is why they form a clean band from a cape or mound while vanishing at the water's edge. A seaside shrine rope bending slightly toward the water, or a change in the color of a lighthouse flame, is also said to warn that the offshore lights are beginning. Elders who know the signs tell young crews that the tide is falling and the fire will rise, and advise them not to sail. No ash or smoke remains. For a brief hour after dawn, shells on the tidal flat are said to glow pale rose and dew on the reeds to keep the fire's last color. On such mornings, villagers scatter salt on the beach and give thanks for the lives guided home. The parent fires open a way for those who understand awe and courtesy, retreat from the overconfident, and quietly draw the boundary between human beings and the sea anew.

In early modern tales, the Vermilion Tray is depicted as a red-faced monk-like figure, appearing as an accomplice of the Long-Tongued Crone or showing its visage alone, reappearing to unnerve and harm people. The name varies between “Watcher of Necks” and “Vermilion Tray,” commonly read as Shunoban. Classic illustrations and yokai prints note a red face, horns, a split mouth, and a fiery aura, though details differ by source. Encounters occur mainly at night at shrine gates, in wastelands, and in tumbledown shacks, and the harm is told as loss of spirit leading to fainting, lingering illness, or death. Reports span regions such as Aizu and Echigo, not as a fixed local deity but as a circulating tale-type of the uncanny.

This version turns to the phenomenon of "kappa possession" that the Shōkichi tale conveys. Most kappa stories play out at the water’s edge, but here the river sumo is carried right into the home. Brought back by his family, Shōkichi went on raging as if locked in a grapple with an unseen opponent—exactly the work, people said, of a kappa that had possessed a human being. A water-spirit climbing onto dry land by borrowing a human body: there lies the spine-chilling fascination of this tale. The means of quelling it, too, reflects the faith of the land. What first took effect was the power of Gō Yoshihiro’s signed blade. The belief that the kappa dreads a keen edge is found in many regions, and the detail that it raged again once the sword was removed shows that power plainly. What finally settled the disturbance was the prayer of a shugenja, an ascetic who trains secluded in the mountains. Quelling kappa possession with these two—the power of the blade and the ascetic’s spiritual force—is a hallmark of Kyushu kappa tales. Hita has gathered many kappa stories, the Hita Gunshi foremost among them, and together with the "Bungo Kawatarō" of the same Bungo, they attest to the depth of this region’s kappa beliefs.

Spirit Wind is spoken of as an invisible wind that brings sudden chills, fever, and lightheadedness to those it touches. Its timing on the morning of the sixteenth day of Bon is emphasized, and the “spirits” here are the souls of ancestors or the unconnected dead. The wind is understood as carrying the aura of spirits crossing the boundary between return and departure. In the Goto Islands, people strictly avoid graves and grave roads on that day and refrain from going out. On Iki Island, illness is seen as a possessing wind, with graveyard-origin termed dead-spirit wind and grievance-origin termed living-spirit wind. It aligns with regional beliefs in malign winds, where seasonal fatigue and sudden gusts intersect with folk explanations and are remembered as spirit afflictions. It is not told as a yokai with active malice, but as a taboo that warns of misfortune for those who mistake the date or place.

An edition distilled from late Edo-period ukiyo-e and comic prints depicting the smiling Hannya. Horns, fangs, bristling hair, wide staring eyes, and a strained grin form its core. Objects in its hands often allude to life and death, unsettling viewers with deliberate motifs. The demon-woman is understood to have once been human, transformed by accumulated jealousy, resentment, and attachment, aligning with the concept behind the Hannya mask. Specific local legends are sparse, yet it was treated in night-time tales and picture books as a symbol of fear and admonition, preserved as an image of the extreme of a woman’s grudge. In local oral tradition sometimes only the name remains, with the transmission of its form relying mainly on pictorial sources.

When the curtain of a blizzard falls, the Snow Elder appears as an old man in white robes, calling from afar to strip travelers of their sense of direction. He belongs to the lineage of snow-related apparitions, overlapping in role with Yuki-onna and Yuki-nyūdō, yet marked by his elder form. His figure is indistinct, fading the closer one approaches, while only his voice is said to echo from behind. In folklore he is understood as a symbolic warning against the perils of winter weather.

The name “spirit of dreams” found in pictorial sources is secondhand and not firmly tied to a specific image. Depictions often show an elderly figure leaning on a staff and beckoning, suggesting a symbolic guide of dreams. Some propose it arose from misread characters for a grass spirit or tree yokai, but this is uncertain. Here it is framed as a nature spirit that mediates dreams and portends good or ill, linked to the role of dreams in divination and omens. Personalization and proper names are avoided, positioning it as a numinous rank residing in the power of dreams themselves.

A spiritual presence dwelling in votive ema plaques, known from shrine and temple origin tales and ghost stories. It appears most often at dusk or in dreams, and its form is thought to reflect the donor’s wish or the plaque’s artwork. As an old man it teaches or warns, and as a woman it may invite or manifest. It is not a deity itself, but a spirit residing in an offering, revealed through the power of the sacred precinct. It shuns being taken home without cause, defiled, or thrown into fire, and favors proper return or ritual burning. Encounters can be auspicious or ominous, with fortune depending on one’s conduct.