Yokai Encyclopedia

An interpretation based on Toriyama Sekien’s Hyakki Tsurezure Bukuro and related Hyakki Yagyō iconography. Gourds served as containers for water or sake and as percussion in festivals, and after long use were believed to acquire spirit in line with the tsukumogami view. The Gourd Boy appears as a human figure with a gourd for a head, briefly emerging from a night path or from grass to make passersby flinch, and little more. Its nature, name, and any definite harm are not fixed in sources, and alongside utensil-yokai like the Mortar Monk it is read as an allegorical old tool given life. Local oral lore is scant, with paintings and later commentaries as the main sources.

In the imperial court’s Great Tsuina exorcism, this figure confronts and drives out pestilential oni. Wearing a four-eyed square mask, bear hide, and armed with a halberd and great shield, he leads pages and tsuina attendants to circuit the four directions of the palace. The rite follows set forms—onmyoji invocations, drum cues, and expulsion beyond the gates—and later influenced demon-chasing observances at temples and shrines. By the late Heian period, shifts in the term tsuina saw him at times enact a visible “oni role.” Though attire, implements, and routes changed with ceremonial norms, the core purpose remained the banishment of epidemics and ill fortune.

An interpretation shaped by medieval war tales, otogizōshi storybooks, and early modern theater. As Shuten-dōji’s foremost lieutenant, Ibaraki-dōji held Mount Ōe and was routed by Raikō’s ruse. Later tales tell of Watanabe no Tsuna cutting off and reclaiming an arm at Ichijō Modoribashi or at Rashōmon. Accounts vary on birthplace and even gender, with traces in Settsu and Echigo traditions. This version follows the most widely circulated storyline in the sources and avoids embellishment.

The heart of Ichikishima-hime's identity lies in the idea of the 'princess of the sacred island': a goddess who dwells in the island where divine service is performed. At Munakata on the Genkai Sea, she protects routes toward the continent; at Itsukushima in Aki, she watches over the passages of the Seto Inland Sea. The divine command concerning the northern sea route makes her a guardian of the boundary joining the realm to the ocean. Her historical identification with Benzaiten layered the virtues of water, wealth, music and performance, beauty, and wisdom upon this maritime guardianship. Itsukushima Shrine's halls over the water and great vermilion gate provide its most majestic expression. At high tide the sanctuary seems to float; at low tide it reconnects with the land. The changing waterline continually redraws the boundary between sea and shore, sacred precinct and human world—the very boundary she guards. Ichikishima-hime remains inseparable in lineage from her sister goddesses Tagori-hime and Tagitsu-hime, and historically cannot be understood without Benzaiten, the deity with whom she was joined. Ebisu, another deity of the sea and good fortune, echoes parts of her religious role. She is therefore more than a local goddess of Miyajima: her worship spans the Genkai Sea and Seto Inland Sea and brings safe navigation into relation with cultural and material flourishing.

To read Iizuna Saburō, one must overlay three strata: the syncretic honzon-image of "Izuna Gongen," the heterodox art of the "Izuna method," and the devotion of the Warring-States commanders. The antiquity of this faith is backed by the texts. The Asabashō of the first year of Kenji (1275) carries the name of Mt. Iizuna and its founding ascetic; the Togakushi-san Kenkō-ji Ruki (1458) records "Izuna Saburō" and "the third tengu of Japan"; the Iizuna-san Meguri Saimon (1546) gives the origin as the Chira Tengu come from Tenjiku; and the Iizuna-san Ryaku Engi transmits the honji-butsu and the lineage of the Sennichi-dayū. From Kamakura to Edo, it is a faith handed down in layers. The iconography of the honzon is profoundly distinctive. A crow-tengu holding a sword and a rope rides upon a white fox, with a snake often coiling about the fox. Its honji-butsu is expounded now as Fudō Myōō, now as Dakini-ten, varying by source. It is precisely this composite character—"tengu, fox, Fudō and Dakini" joined in a single body—that is the reason Izuna Gongen, surpassing a mere mountain tengu, became a point of concentration of esoteric ritual power. At Takaosan Yakuō-in, the Iizuna Shrine of Shinshū, Jinya-ji on Mt. Kano in Chiba and elsewhere, the faith is especially deep in Kantō and to the north. The "Izuna method" is the practical face of this ritual power. This sorcery, which employs tengu and kuda-gitsune to heal illness and, by possession, to deliver oracles, was counted a heterodox art alongside the Atago Shōgun-hō and the Dakini-ten-hō, and those who wielded it were called Izuna-tsukai. The folk belief that one kept and employed kuda-gitsune within a bamboo tube made the very name "Izuna" a byword for witchcraft. And it was the devotion of the warrior houses that raised Iizuna Saburō to a war-god. It is famous that the crest of Uesugi Kenshin's helmet was an image of Izuna Gongen; there is also the case of Takeda Katsuyori granting the name Nishina to the adopted son of the Sennichi-dayū, and commanders such as Hosokawa Masamoto who practiced the Izuna method itself. As a god who governs victory in war, Iizuna Saburō is, even among the forty-eight tengu of the Tengu-kyō, the seat most bound to this-worldly benefit. Chigiri Kōsai of tengu scholarship placed this many-sided Iizuna Saburō within the system of the great tengu of the many mountains.

This version follows the figure recorded in the Tenpō-era compendium Hokuetsu Seppu. Its form is ape-like yet larger than a human, with long hair flowing from crown to back, appearing after parting the dwarf bamboo in mountain ravines. It shows no intent to attack homes, chiefly begs for cooked rice, and repays alms by carrying loads and similar deeds. It is closely tied to the weaving culture of Echigo-chijimi, and in tales of loom maidens it intervenes amid household work rules and notions of ritual purity, turning the tide so deadlines are met. Such accounts treat it as a mountain spirit observing human industry and bringing harmony to cycles of trade and production, akin to food offerings made to mountain deities or guest spirits. Later it was reportedly seen at times but returned to the mountains, leaving only its name. Though an unidentified beast, its refusal to harm and habit of repaying kindness place it on the boundary between uncanny and blessed in local lore.

A strand of Okinawan beliefs about living spirits. When hatred or envy swells, a person’s spirit may slip out while retaining their form and afflict the target with illness or malaise. Reports describe several modes: possession via gifts, attachment through a curse-doll known as the Nama-Jama Buddha, and even obsession achieved by will alone. Harm was said to strike not only people but also livestock and fields. Communities responded with yuta prayers, apotropaic fouling, and even driving it off through scolding and insults. Some accounts say the lineage passes matrilineally, leading to recorded cases of avoided marriages. Early modern records note accusations, lawsuits, and punishments for alleged use.

The image of the ikiryō holds two faces: a curse born of resentment, and gentler visitations tied to parting before death or to acts of gratitude. In Heian beliefs, overpowering thought left the body as a “shadow,” appearing at bedchambers, ox-drawn carriages, or gates. In the medieval and early modern eras, scenes witnessed in dreams, will-o’-the-wisps, and flying heads were taken as proof of the soul’s separation. In medical views it was classed as a disorder of the departing soul or of the shadow, with reports of people seeing their own double. The cursing rite of the Hour of the Ox is often linked as a willed sending of intent by the living, though not identical. Regional lore varies in name and form, with some places recording it as a footfall-making human shadow. Overall, it is understood as the coagulation of thought taking shape, a spiritual action of the living set against the dead.

The principal deity of Inari, Ukanomitama-no-Kami (also known as Ukanomitama-no-Mikoto), is a goddess of grain and food appearing in the first volume of the "Kojiki" (712). The name combines "Uka" (ancient word for food) and "Mitama" (spirit), preserving its simple folk origin as the "personification of spiritual power dwelling in grains." The head shrine, Fushimi Inari Taisha (Mount Inari, Kii County, Yamashiro Province; present-day Fushimi Ward, Kyoto), originated on the first Day of the Horse in February 711. It was founded when Hata-no-Irogu, head of the Hata clan (an immigrant clan who pioneered the Kyoto basin and Fushimi area), shot an arrow at a target made of mochi (rice cake). In a miraculous event, the mochi transformed into a white swan, flew away, and sprouted rice plants where it landed on the mountain peak, prompting the enshrinement of three deities (according to a lost text of the "Yamashiro no Kuni Fudoki"). The three deities were Ukanomitama-no-Okami (the main deity), Satahikoo-no-Okami, and Omiyanome-no-Okami; later, Tanaka-no-Okami and Shi-no-Okami were added to collectively form the five Inari Okami. For its rapid expansion in faith after the Heian period, its connection with To-ji Temple, the head temple of Shingon Esoteric Buddhism, played a decisive role. Starting with the legend of Kukai seeking Inari's cooperation when constructing To-ji, Shingon Buddhism and the Inari faith became deeply intertwined, leading to a syncretism with the Indian esoteric female demon Dakini-ten (Ḍākinī). Originally a "man-eating female yaksha," Dakini-ten softened as she passed through Tibet and China to Japan, becoming depicted as a "celestial maiden riding a white fox," and was eventually identified with Inari. This established a unique lineage of Buddhist Inari (Toyokawa Inari/Myogon-ji founded in Aichi in 1441, Saijo Inari/Myokyo-ji founded in Okayama in the 1300s, etc.), coexisting with the Shinto Inari (Fushimi lineage). During the Edo period, a massive boom occurred where people of all classes—samurai, townspeople, and farmers—enshrined Inari in small shrines on their properties as household deities. It became so widespread that a famous senryu poem listed "Iseya, Inari, and dog poop" as the most commonly seen things in Edo. Modern Inari shrines are estimated at about 32,000 (2,900 head shrines + branch shrines + household shrines), making it Japan's largest belief system by number of shrines. The relationship with foxes requires careful attention. While Fushimi Inari Taisha officially clarifies that "the fox is a divine messenger (familiar) of the Inari deity, not the deity itself," in folklore, many regions treat the fox itself as the Inari deity. This "fox deity faith" from the Edo period onward remains the mainstream of folk belief today. The messenger foxes are called "Byakko" (white foxes) and are traditionally depicted holding one of four items in their mouths: a jewel, a key, a rice sheaf, or a scroll. The jewel represents divine virtue, the key opens the spiritual granary, the rice sheaf represents grain, and the scroll signifies Buddhist scriptures. The main prayers are for bountiful harvests, prosperous business, family safety, fire prevention, and warding off epidemics. Especially since the Edo period, as it became a merchant household deity, prosperous business and financial fortune have become the primary focus. Today, this practice has spread to corporate and storefront altars (even small shrines on commercial building rooftops) and roadside shrines, embedding itself deeply in Japanese society across the four tiers of shrines, temples, residences, and corporations. The annual Hatsu-uma Matsuri (Festival of the First Day of the Horse) in February marks the descent of the Inari deity and is celebrated grandly at Inari shrines nationwide.

Inugami are feared as hereditary possessing spirits tied to certain lineages, bringing wealth and prosperity yet shunned as curse gods. Rites and keeping methods vary by region, with offerings made in storerooms, under floorboards, or at water jars. Their form is not fixed: accounts describe a mottled mouse-like creature, a black-and-white weasel-like shape, a long-mouthed rat, or something bat-like. Houses said to keep inugami were believed to have as many spirits as family members, and the spirits were rumored to run to other homes to obtain desired goods. The possessed might bark, tremble in the shoulders, or gorge themselves, and even cattle, horses, and tools were said to be possessed. Exorcism was performed through prayers and esoteric rites, with shrines in Tokushima particularly noted. Origins are variously traced to sorcery, legal taboos, and rites that turn a dog’s head into a fetish, differing by locale.

The image of Inugami Gyobu should be understood through the lens of how the Matsuyama tanuki tales were reshaped by kodan storytelling. Across Shikoku, dense beliefs in tanuki and transformation legends spread, and in Matsuyama both “guardian” and “trickster” aspects were told of beings dwelling at the boundary between the castle town and the wilds. The title Gyobu signals a bond with the castle, emphasizing a guardian role, while kodan added favored conflicts—such as inviolable pacts and ambushes during internal clan strife—producing varied plotlines. In every variant, the rock shelters and caves of Mt. Kuma form the final stage, where sealing or pacification brings closure. The appearance of Ino Budayu also became standard, linking in a known monster-slaying tale from other sources and lending a higher authority of supernatural judgment to the Matsuyama tanuki narrative. His spiritual power and many retainers match regional views of a tanuki chieftain leading a band, serving as a framework to explain wonders at annual castle-town events and at passes or shrine precincts. Though today’s lore bears kodan embellishments, at its core remains the figure of a tanuki lord guarding the liminal zone between castle and mountain.

This version consolidates images of the Ipetam found across Ainu traditions. The blade rings of its own accord and shows hunger by the act described as “eating” stone or leather. Once drawn it will not rest until it sees blood, and tales say it may fly on its own to cut people. Its curse threatens households and kotan, inviting disaster beyond the owner’s will, so it is contained through rites and taboos or by sinking it in water. In Asahikawa and Kamikawa, after casting it into a bottomless bog, a rock in the shape of a sword is said to appear, tying requiem to place names and landscape origins. In Saru, a wit tale survives in which imitating the sword’s sound repels bandits, showing its fearsome name worked as a deterrent. In Kiritoi, Kushiro, an alias tale engraves taboo violation and harm into the sword’s very name, marking it as a remembered calamity object. Related types include the man-eating spear Ipe-op and the self-defense knife Sōsamusipe, suggesting a systematic view of baleful blades and weapons. This reconstruction avoids creative embellishment and adheres to regional records of the cursed sword.

A portrayal of the Ippon-datara based on records from Kii and Kumano through Nara. It is said to be one-eyed and one-legged, but firsthand sightings are rare; in many regions a single large track left after snowfall is taken as proof of its presence. Its most notable trait is appearing on December 20, the “Hate-no-Hatsuka,” a day overlapping taboos of mountain deities and roads, effectively discouraging entry into the mountains. In its link to smithing, folklore explains the one-leg one-eye form as derived from the tatara blower treading the bellows with one foot and watching the furnace with one eye. In the Obagatōge lineage it is equated with the oni-god Inosasao, once a terror of the peak but sealed by a monk and released only once a year. In Kumano and Itsukushima it is said “only footprints appear, not the body,” feared yet seldom directly harmful. While stories of one-legged snow spirits (such as Yuki-nyūdō and Yukibō) have blended with it, this entry centers on the Kumano–Nara stream, emphasizing three points: the taboo day, the single track, and the blacksmith-origin theory.

Iso-onna is a female sea apparition of northwestern Kyūshū. Above the waist she looks like a young woman with long black hair soaked in seawater. Below it, her outline dissolves into mist and waves without leaving footprints, or else lengthens into a serpent's body. Seen from behind, she can be mistaken for a wet rock. In Minamishimabara, Nagasaki, she stands gazing offshore; anyone who speaks to her is answered with a piercing cry, then caught in her hair and drained of blood. Her most feared habit is boarding vessels at anchor. In Amakusa, Kumamoto, Iso-onna climbs a stern mooring line after dark and covers a sleeping person's face with her hair. Boats spending the night in an unfamiliar harbor therefore lower the anchor but leave the stern untied from shore. The very line joining boat and land becomes her path aboard. Other safeguards survive around the region. On the Shimabara Peninsula, three stems pulled from a thatched covering were laid on a person's clothing before sleep so that Iso-onna's hair could not catch them. The Sōgō Nihon Minzoku Goi, edited under the supervision of Yanagita Kunio, records this coastal female apparition under names including Iso-onna and Iso-nyōbō. Iso-onna differs from Umibōzu and Funayūrei, which more often attack in open water. Her defining territory is the rocky shore or anchorage, where land and sea touch. Many communities connect her with drowned women or with a woman who died while waiting for her husband to return. In western Japan, she may also appear beside Ushi-oni, approaching first to lower a victim's guard before the other creature attacks. Hair, blood, and the shoreline boundary form the core of her image. The story of her climbing a mooring line, and the practical customs of anchoring without tying the stern or placing three reeds on one's clothing, preserve both a fishing village's fear of the night sea and its knowledge of how to live beside it.

A feared variant along Amakusa and the Shimabara Peninsula, named for slipping aboard by following the aft mooring rope. She appears as the upper body of a young woman scented with the sea, while her lower half is hazy and shifting like wave-shadows. Her long wet black hair constantly streams from her chest to the floor, branching into fine threads that cling to human skin. When a hush falls over the harbor at midnight, she stands in the lee of the shore or at a stern’s tip staring seaward, and will either echo the name of anyone who calls to her or answer with a piercing scream. At that cry she reaches a white hand to the aft rope, crosses soundlessly onto the boat, shrouds a sleeper’s face with her hair, and twists up blood strand by strand. By morning only a tide stain and a thin ring of hair remain at the pillow. Said to be the shape taken by the regrets of the drowned or a love unfulfilled by one who waited at the harbor, she is known as an isonna and also as nure-onna. The practice of avoiding the aft rope comes from this variant’s habit of treating ropes as roads. So long as she touches a line she can climb anywhere, but she does not swim about recklessly and prefers calm surfaces. On thin-moon nights some have seen her walk the water from shore, but only when the harbor tide lies asleep. She is weakened by light and prayer, so fishermen in unfamiliar ports avoid taking the aft rope, drop only the anchor, and keep the gunwale light burning. In Shimabara it is said that placing three dry thatch reeds from a roof upon one’s kimono while sleeping prevents tangling and wards her off. Those who touch her hair are seized by chill and lethargy, and the roar of the sea lingers in their ears for days. She is merciless toward mockery and rudeness, targeting first those who call her name without honorifics or taunt her with whistles. Conversely, she is said to avoid boats whose crews offer prayers for the lost at sea. Some tales claim that if you move behind her she resembles a rock shadow, and under moonlight her back becomes the outline of a wet reefs tone to let waves pass. The Isonna of the Aft-Rope Crossing is a grudge born at the liminal space of the harbor, hard to approach for those who keep the code and unforgiving toward arrogance, dropping her hair without mercy.

Edo-period strange tales and works of natural history describe Isonade as a sea monster that approaches without disturbing the surface. A crew may notice only a change in the water's color or the wind before the danger is already beside the ship. Its body resembles a shark, with coarse projections and needlelike growths extending from the back toward the tail. Isonade is most often associated with cold, cutting winds, and days of strong northerlies were treated with particular caution. Sailors avoided noisy work, put nets and ropes in order, and kept away from the rail. Such practical rules became part of the story's warning. Names and details differ from place to place, but the core remains the same: Isonade arrives invisibly, and by the time it is seen, a sweep of its barbed tail has already pulled someone overboard.

This interpretation shatters the illusion of the "innocent and brave little person" sanitized by later children's literature, restoring his true nature as the "extremely ambitious and cunning trickster" depicted in the original Muromachi *Otogizoushi*. This version of Issun-boshi carves out his destiny not through martial force, but through advanced psychological manipulation (off-board tactics) and amoral scheming. His greatest defining trait is his abnormal "upward mobility." Burdened with the supreme handicap in human society—a height of merely one sun (about 3 cm)—he never abandons his ambition to take a powerful man's daughter as his wife and achieve worldly success. His method of framing the princess using the "rice grain scheme," having her disowned by her father to socially isolate her, and creating a state of complete dependence on him, displays a cold-blooded Machiavellianism that puts modern psychopaths and con artists to shame. Even in his battle with the oni, he does not fight fair and square. He turns the desperate situation of being swallowed whole to his advantage, executing a gruesome internal destruction (assassination technique) by continuously stabbing the oni's internal organs from the safety of its body (stomach and eyeballs) with his needle-sword. Finally, he robs the oni of its treasure, the "Miracle Mallet," using it to rapidly grow his body and ultimately obtain the ultimate social status of a "perfect human man." He represents the darkest and most realistic rags-to-riches hero in Japanese literary history, overturning his inherent, irrational handicaps entirely through intellect, lies, and the plunder of otherworldly power (the oni's treasure).

Drawing on the Konjaku Monogatari-shū, later scholarship calls it “Ita-oni” (Board Ogre). The entity is either a board itself or a phenomenon dwelling in a board, taking a plank-like form that juts from roof beams or lattices. Its motive and will are unstated, but its core act is crushing sleepers to death. In Heian court and aristocratic residences, night watch and gate duty were crucial, and tales of the uncanny often served to reinforce discipline. Here too, it bypasses two armed men and strikes a defenseless sleeping place, embodying the ethic that negligence invites death. While it aligns with the idea of spirits inhabiting objects, it lacks tales of aging into autonomy or growth, and is told as a transient manifestation of a specific board appearing to suit the scene. There are no records of pursuit or capture, and it appears and vanishes swiftly without leaving traces.

This version, 'The Death Herald Crying Itsumade (Until When) / Itsumaden', goes beyond being a mere physical monstrous bird, highlighting its aspect as an 'ominous bird of prophecy' that embodies the anxiety of its era's society. In the *Taiheiki*, the appearance of this monstrous bird coincides with the political upheaval of the Kenmu Restoration (1334). The bird's cry of 'Itsumade (Until when?)' superficially incites the fear of death from plagues. However, in a literary and historical context, it acts as a political allegory, representing the agonizing cries of the common people exhausted under Emperor Go-Daigo's direct rule: 'Until when will this war and suffering continue?' In medieval literature, a monster appearing on the roof of the Emperor's palace (Shishinden) signified a warning from heaven (heavenly punishment) against the instability of royal authority and a lack of virtue. Furthermore, the sequence of exterminating this monstrous bird strongly mirrors the 'template' of Minamoto no Yorimasa's 'Nue extermination' in *The Tale of the Heike*. The structure—an unidentified chimera appearing at the night palace, its subjugation by a master archer, and the subsequent reward from the Emperor—served as an epic device to heroicize Oki Jirozaemon Hiroari as a 'new Yorimasa', thereby decorating the authority of the Kenmu government that commanded him. However, while the Nue cried with a voice 'like a bulbul', this bird uttered the clear, human-like words 'Itsumade', imbuing it with a much more direct curse upon its era. During the Edo period, when Toriyama Sekien drew it in his *Konjaku Gazu Zoku Hyakki*, he added the depiction of it breathing terrifying flames from its mouth. The original text of the *Taiheiki* contains absolutely no mention of it breathing fire. This is thought to be the result of overlaying the imagery of mysterious lights flying in the night sky and the 'Kasha' (fire chariot) that carries the resentment of the dead. The visual impact of this 'flame' and 'nocturnal monstrous bird' decisively shifted its interpretation in the later Showa period toward a vengeful spirit, described as 'a monster born from the resentment emitted by abandoned corpses.' In this version, Itsumaden is not merely a bird of prey that attacks people; it is closer to an 'arbiter' that manifests using the resentment of those who died with no one to mourn them and the distortions of society as its energy. Therefore, its cry functions as a cold herald of death, striking directly at the listener's mind more than any physical attack could, questioning: 'Until when will your fate (or your sins) hold out?'

Completely stripped of the pop-culture motif of a "friendly yokai with eyes and a mouth that speaks a local dialect" depicted in later anime and manga, this interpretation faithfully reproduces the "fundamentalist terror" of the oldest folktales passed down in the Osumi Peninsula of Kagoshima Prefecture. This version of the Ittan-Momen is depicted as an entirely "Faceless, silent assassin" completely incapable of communicating with humans. The core of its terror lies in its overwhelming "silence" and "otherness." On dimly lit paths between rice paddies at dusk, or at the edge of deserted woods at night, it glides down from the sky just like an ordinary piece of white cloth, making no sound of flapping wings or footsteps. Then, it silently descends from above the target's head, completely covering the human's entire face with the sensation of cold, damp cloth, and rapidly suffocates them by wrapping tightly around their neck multiple times. Since it is merely a long piece of cloth with no eyes, nose, or mouth, the victim can neither read its emotions nor beg for their life; they are simply robbed of their sight and breath in the darkness, experiencing the ultimate "claustrophobic terror." Furthermore, it is accompanied by a highly gruesome episode showing that it is not merely a "moving piece of cloth (a tool spirit)." A man who was attacked by this apparition on a dark road and was about to die of suffocation unsheathed the wakizashi (short sword) at his waist and frantically slashed at the cloth wrapped around his face. At that moment, the cloth instantly vanished into the darkness, but the blade of the sword left in the man's hands was thickly smeared with warm "fresh blood." This vivid, physical tale of confrontation—where "slashing it causes it to bleed"—strongly suggests that the Ittan-Momen is not merely a trick of the wind or a cloth monster, but an unidentified "fleshy, grotesque predator," brilliantly embodying the primal fear lurking in the rural darkness.

Based on Edo-period records and regional folktales. An aged char trout appears in the guise of a Buddhist monk and speaks to anglers. It often urges moderation, citing the temple’s domain or the pool’s lord, and departs quietly if given alms. Later it may be caught as a great char, where rice or rice cakes given as alms are found in its belly, revealing its identity. The motif reflects reverence for river and pool guardians and ideas akin to eel and other water deities. Depending on region, it appears as a harmless, didactic type, a warning type bearing deadly poison, or a salvific type that sacrifices itself to stop a levee breach, yet all embody folk norms that safeguard the boundary between waters and livelihoods.

The true identity of Iwanaga-hime is the daughter of Oyamatsumi appearing at the end of Volume 1 of the *Kojiki* and in the 9th stage of the Age of the Gods in the *Nihon Shoki*. She is written as "Ishinaga-hime" in the *Kojiki*, and "Iwanaga-hime" in the *Nihon Shoki* and *Sendai Kuji Hongi*, with theories also equating her with Kokemusuhime and Konohana-chiru-hime. According to the semantic interpretation by Kokugakuin University's Classical Culture Project, her divine name means "a woman as eternal, steadfast, and enduring as a rock (Iwa)"—clearly designating her as a goddess symbolizing immortality, longevity, firmness, and solidity. Positioned alongside her younger sister Konohana-no-sakuya-bime as the two daughters of Oyamatsumi, she forms the core of contrast structures: "rock vs. flower," "eternity vs. transience," "solidity vs. beauty," "immortality vs. short life," and "rejected older sister vs. accepted younger sister." The core of her narrative lies in the myth of the heavenly descent (Tenson Korin) found at the end of Volume 1 of the *Kojiki* and the 9th stage of the *Nihon Shoki*. After Ninigi-no-Mikoto (the heavenly descendant) descended to Takachiho in Hyuga, he met the beautiful Konohana-sakuya-hime at Cape Kasasa and proposed to her father Oyamatsumi. The father was overjoyed and presented both the older sister Iwanaga-hime and younger sister Sakuya-hime with many tributes. However, Ninigi rejected Iwanaga-hime for her ugly appearance, sending her back and marrying only Sakuya-hime. Oyamatsumi's lament became the story's climax—in the *Kojiki*: "If you had let Ishinaga-hime serve you, the lifespan of the heavenly descendants would have been eternally immovable like a rock; but because you kept only Sakuya-hime, your life will be short like the flowers of trees" (lifespan shortened due to the failure of Oyamatsumi's oath); in the *Nihon Shoki*: "Shortened lifespan caused by the curse of the unaccepted Ishinaga-hime" (a more direct causality). Though slightly different, both accounts serve as the origin myth for the shortened lifespans of humans and the imperial line, forming the foundation of Japan's indigenous view of life and death before Buddhism. Comparative mythologist Tarō Ōbayashi classified this tale of contrast between Iwanaga-hime and Konohana-sakuya-hime as a Japanese variant of the "banana-type myth" (a tale of choosing between a stone and a banana). Belonging to the same lineage as the origin myth of death from Sulawesi, Indonesia (where humans chose a delicious banana over a stone, losing eternity to gain a short life that withers in one generation), it is the Japanese equivalent of universal origin of death myths like the Book of Genesis (expulsion from Eden) or Greek mythology (Pandora's box). Among her shrines, Kumomi Sengen Shrine (Kumomi 386-2, Matsuzaki, Shizuoka) garners attention in Shinto history and folklore studies as a rare shrine among the approximately 2,000 Sengen shrines nationwide that exclusively enshrines Iwanaga-hime. Sitting atop Mount Eboshi (elevation 162m), an ancient legend (recorded in the late 18th-century *Kojiki-den*) says, "When Mount Eboshi is clear, Mount Fuji is cloudy," historically identifying it as the older sister's seat in contrast to Sakuya-hime's Fuji. It was rebuilt in 1657, with its original founding unknown. Hoshoishi Shrine (Mikumo, Itoshima, Fukuoka) in the center of Ito-koku is an ancient shrine enshrining both sisters (recorded in the 1695 *Hoshoishi Shrine Engiki*). This rare sister-pair worship suggests a connection between imported continental culture and the Iwanaga-hime faith, given Ito-koku's role as ancient Japan's gateway to the continent. Shiromi Shrine (Shiromi, Saito, Miyazaki; former Nishimera Village area) enshrines three deities: Iwanaga-hime, Oyamatsumi, and Prince Kaneyoshi (of the Nanboku-cho period), founded in 1489 with its original sanctuary built in 1675. Its sacred object is a "silver mirror"—a place-name origin legend claims the mirror Iwanaga-hime threw in despair over her looks caught on a tree on Mount Ryubo, changing "Shiromi Village" to "Silver Mirror (Shiromi) Village." As a symbolic equivalent to rock, the mirror shows the unique syncretism of Iwanaga-hime's rock worship and mirror deity worship. The 33-part Shiromi Kagura dedicated every December 12-16 is a National Important Intangible Folk Cultural Property, representing the pinnacle of Kyushu folk performing arts as the primary stronghold for modern Iwanaga-hime veneration. Yui-no-Yashiro (Middle Shrine) of Kifune Shrine in Kyoto has been deeply worshiped for matchmaking since before the Heian period. Originating from the paradoxical legend that Iwanaga-hime hid in Kibune out of the shame of rejection, declaring "I will bestow good matches upon the people," she has been worshiped as "a god who does not sever ties, making them endure." The literary foundation for this matchmaking divinity is the story of Heian poet Izumi Shikibu (978?-1041?), who prayed here during marital strife and achieved reconciliation after dedicating a famous firefly poem. This paradoxical faith structure, linking the rock (a symbol of eternal immobility) with "enduring relationships," has continued unbroken from the Heian era to today. In folk beliefs, Mount Omuro in Izu (elevation 580m) is seen as her incarnation, carrying a sympathetic superstition that "praising sister Fuji while climbing Mount Omuro brings curses of injury or poor fishing"—a classic example of folk empathy for the "rejected ugly sister." Furthermore, Mount Tsukuba's Gessuiseki Shrine (Tsukuba, Ibaraki) enshrines an Iwakura where Iwanaga-hime reportedly died, showcasing the blending of ancient Japan's rock worship with her divinity. At Oyamatsumi Shrine's precinct shrine, Anaba Shrine (Omishima, Imabari, Ehime), she is enshrined with her father Oyamatsumi, preserving the origin of father-daughter worship. Today, since Mount Fuji's World Heritage registration (2013), Kumomi Sengen Shrine and Mount Eboshi have become tourist destinations. Additionally, as the "sister rejected by beauty standards," she resonates with modern female readers, advancing a feminist re-evaluation. Frequently reappearing in modern media with themes of "immortality/solidity," "kindness behind ugliness," and "matchmaking," the modern reinterpretation of this ancient myth continues to evolve.

Adheres strictly to Toriyama Sekien’s image and notes, avoiding later embellishments. The yokai is shown as the back view of a young woman standing by water, while the surface reflects the visage of an old man. The name draws on Dongfang Shuo’s “kaizai” expressions of wonder, suggesting Sekien likely fashioned an allegory. Youth and age, beauty and ugliness, front and back are opposed within a single frame, read as a design warning against being deceived by appearances. Firm oral traditions are scarce, so its character is defined largely through image interpretation. The readings iyaya or iyami vary by source, possibly evoking refusal or repulsion akin to “no,” but the literature offers no certainty.

The Seven Generations of the Gods and the cosmology of creation. The basic account covers land-birth and god-birth. Looking more closely, the Seven Generations of the Gods form a creation sequence in their own right. The Kojiki says that after heaven and earth open, the three creator deities and the Separate Heavenly Deities appear, followed by the divine generations beginning with Kuni-no-tokotachi. The line moves from solitary, abstract deities toward paired gods, then finally reaches Izanagi and Izanami as husband and wife. Myth moves from abstraction into relation, sex, marriage, and birth. Their marriage and the birth of the land are the decisive passage from divine potential into a concrete world. The Floating Bridge, the jeweled spear, and Onogoro Island. The scene in which the two gods stand on the Floating Bridge of Heaven and stir the sea with Ame-no-nuboko is one of the most important images in ancient Japanese cosmology. The bridge joins heaven and earth as a vertical world axis. The spear is an instrument of creation. Brine hardening into an island marks the passage from liquid to solid, from formlessness to form. Onogoro Island means something close to an island that congealed by itself, suggesting that creation is not only divine command but also natural self-formation. The scene can be read beside Pangu's separation of heaven and earth, the Indian cosmic egg, and Eurasian myths of stirring primordial waters. The descent to Yomi, an early East Asian Orpheus myth. Izanagi's descent to Yomi, his broken taboo, and his flight from the dead belong to the mythic type in which someone enters the underworld to recover a lost wife and fails after violating a prohibition. The Greek story of Orpheus and Eurydice is the most famous example, while Izanagi's version, written in the Kojiki in 712, is one of East Asia's earliest textual witnesses to the type. The stolen glimpse, the broken command, the pursuing dead, and the protective peaches all echo underworld narratives from India, China, and Europe, suggesting deep affinities across ancient Eurasian religious imagination. Misogi, the origin myth of Shinto purification. After escaping Yomi, Izanagi washes away its pollution at Awagihara. This is the origin myth of misogi and harae. Gods are born as he removes garments and objects from his body; sea deities are born as he washes in the stream; finally, the highest deities emerge from his eyes and nose. The structure binds body, impurity, purity, and divine birth together. The hand-washing before shrine worship, the Nagoshi no Oharae summer purification, and ritual ablutions before major ceremonies all find a mythic source here. Eda Shrine and Izanagi Jingu honor him as the ancestral deity of purification, showing how an ancient myth continues inside living Shinto practice. The Three Precious Children and ancient Japan's cosmic order. Izanagi divides the sky, night, and sea among the Three Precious Children. Amaterasu Omikami receives Takamagahara, the realm of heaven, daylight, and light. Tsukuyomi no Mikoto receives the realm of night, quiet, and calendrical rhythm. Susanoo no Mikoto receives the sea plain, the ocean and its violent force. This threefold division is not only a mythic plot point. It later supports the legitimacy of the imperial line and Ise Shinto. Medieval, early modern, and modern political thought in Japan repeatedly return to this narrative. It is a central line running through Japanese ideas of state, religion, and cosmic order. Taga Taisha, Izanagi Jingu, and Eda Shrine. The three major sacred places of Izanagi correspond to different moments in the myth. Izanagi Jingu in Awaji marks the beginning of land-birth, the marriage of the two gods, and Izanagi's hidden palace. Eda Shrine in Miyazaki marks Awagihara, purification, and the birth of the Three Precious Children. Taga Taisha in Shiga became a popular early modern shrine of long life and vitality. Together these sites turn the sequence of creation, purification, and longevity into geography and pilgrimage, sustaining Izanagi worship across Japan. Motoori Norinaga's Kojiki-den and the formation of kokugaku. Motoori Norinaga, the Edo-period kokugaku scholar, completed the forty-four-volume Kojiki-den in 1798, using rigorous philology and historical linguistics to interpret the Kojiki, including the myths of Izanagi. Debate continues over whether such myths should be read as history, symbolic narrative, or cultural memory, but Norinaga's method laid an important foundation for modern Japanese humanities. Izanagi therefore extends beyond myth alone. He belongs to the intellectual history of kokugaku, Shinto, modern national thought, and postwar folklore studies, and remains a symbolic figure in Japanese religion, scholarship, politics, and culture.