Yokai Encyclopedia

This interpretation remains most faithful to Toriyama Sekien's commentary, transforming the inkstone—a static piece of stationery—into a "screen of phantoms" that projects the dynamism and tragedy of history. This yokai never threatens or curses its owner. It quietly reveals its form only when the owner possesses deep cultivation and a strong empathic connection to history. In a study enveloped in midnight silence, one pours cold water and gently begins to rub the inkstick. The phenomenon occurs when the flickering candlelight illuminates the surface of the black, glistening liquid ink (the sea of the inkstone). Suddenly, mingled with the rich fragrance of the freshly ground ink, the faint "scent of the sea breeze" and "scent of blood" begin to drift through the air. Then, within the mere few centimeters of the ink sea in the inkstone, pure white crests of waves rise, miniature warships crowd together, and Minamoto and Heike warriors—no larger than grains of rice—appear. They cross swords, loose arrows, and fall into the waves one after another, recreating the decisive Battle of Dan-no-ura. If you listen closely, angry shouts, the sound of crashing waves, and the screams of the court ladies of the Heike echo like a distant auditory hallucination. This is a physical vision manifested through the resonance between the "kotodama" (spirit of language) in *The Tale of the Heike* read by the literatus and the hundreds of years of sorrowful memories held by the "Akama stone," which was quarried from the very sea where the Heike perished. The Spirit of the Inkstone is a "spirit of literature" of unparalleled beauty, poetry, and bottomless melancholy, proving how the act of reading is a mystical ritual that transcends time and space to converse with the dead.

An interpretive version based on Toriyama Sekien’s Hyakki Tsurezurebukuro image and notes. It bears a raptor’s body wreathed in ghostly flame, tongues of fire trailing from beak and talons. Its glow is not a guiding light but a will-o’-the-wisp that scrambles sight and sense of direction. Sekien links it to the glow of “tengu pebbles,” weaving puzzling mountain lights into tengu lore. Said to break the chanting and meditation of yamabushi and devotees, it was feared less for wounds than for unsettling the mind and leading feet astray. Though local oral traditions are scarce, it is understood in line with common notions of phantom fires and tengu fire.

Taira no Koremochi is an entity of the 'demon-slaying hero' archetype who stands not on the side of *yokai*, but on the side that strikes them down. Just as Sakanoue no Tamuramaro subdued Suzuka Gozen and Otakemaru, and Minamoto no Yorimitsu subdued Shuten-doji, Koremochi carved his name in lore as the one who vanquished the demoness Momiji of Togakushi. What makes him a hero is not pure military force, but the fact that the story weaves in 'the limits of human power'—he is initially defeated by Momiji's dark arts and can only conquer the demon after praying to buddhas and deities. The fascination of Koremochi's figure lies in the flexibility with which his protector swaps depending on the medium of the legend. In Noh it is Hachiman, in Bessho-lineage accounts it is Kitamuki Kannon—the same warlord is protected by different divinities depending on local faith and theatrical convenience. This implies that Koremochi is not an entity rigidly tied to a specific god, but rather a vessel carrying the archetype itself of 'the warrior who slays demons with divine protection'. While Kinasa reveres Momiji as a noblewoman, Koremochi is strictly a subjugator executing the orders of the center, and only by combining both does the dual nature of good and evil in the Momiji legend emerge. In this encyclopedia where *yokai* are the main characters, Koremochi is a rare subjugator included as a 'counterpart existence that makes the demon possible'.

A form based on Toriyama Sekien’s illustration and accounts in war chronicles. It bears the will to hinder the Buddhist Law, pecking at temple timbers late at night as an omen of ill fortune. Tradition ties its origin to the vengeful spirit of Mononobe no Moriya, though its shape follows that of a woodpecker. In strange tales the sound comes first, a shadow is seen, and its true body is rarely caught. Folklorically it fuses bird-borne calamity lore with etiologies for temple damage.

An iconographic reading of the Dōjōji bell as depicted in Toriyama Sekien’s Konjaku Hyakki Shūi. While a note alludes to a variant in which the woman, transformed into a serpent, coils around the bell hiding Anchin and heats it until it melts into scalding liquid, hearsay also holds that the bell itself survived in historical record. Its “yokai nature” here is less an ensouled object than a visualization of folk belief in obsession possessing a vessel and causing anomalies. It represents Edo-period reception where Noh, sekkyō, and engi traditions intermingle.

An edition based on visual readings of Toriyama Sekien’s Konjaku Hyakki Shūi and related images. Depicted as a human figure in Tang-style robes with a candle set upon a tray or stand on the head. Said to have had the voice destroyed by drugs and the body tattooed, composing poems in tears or fingertip blood in place of speech. Its true nature is not a monster per se but the tragic end of a person enslaved in a foreign land, giving it a strongly narrative character of human ethics and suffering, even while included in yokai catalogs. Details vary by source, yet the figure consistently stands in the night holding a light. Accounts of salvation or death are inconsistent and left unspecified.

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 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 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 reconstruction guided by Sekien Toriyama’s image and notes. The head resembles a grater, its surface studs likened to porcupine quills. Though written as “Yamaoroshi,” its nature is not a mountain wind itself but an abstract monster born from combining a utensil (grater) with a bestial image. Daikon radishes and mortars placed nearby signal a tsukumogami-style scene, with no specific harm or blessing described. Rooted in Edo-period paintings, it lacks regional oral lore or cult, and later handbooks often present it as an example of utensil transformation and wordplay.

While the *Yamawaro* is a mountain monster unique to the mountainous regions of Kyushu, its greatest originality lies in the fact that it forms two aspects of a single body with the *kappa*. The fact that Terajima Ryoan noted the habitation of *Yamawaro* in Chikuzen and Goto in *Wakan Sansai Zue* is evidence that early modern intellectuals incorporated the folklore of grotesque beings from the western mountains into the framework of natural history, showing that the Goto Islands were designated early on as a land of *Yamawaro* traditions. In the migration belief, it is said that the *kappa* of the river and the *Yamawaro* of the mountain switch places at the boundary of the spring and autumn equinoxes, which is thought to be a crystallization of the agricultural calendar, water god worship, and mountain god worship into a single existential image. Its assistance to woodcutters and the reward of rice balls, its love of sumo, its dietary preference for salt and crabs, and its grotesque form with dog ears, red hair, and a single eye are all supported by the *Wakan Sansai Zue* and the oral traditions of various parts of Kyushu. Amidst life in the Goto Islands, surrounded by sea and mountains, the *Yamawaro* has become inextricably linked to the *kappa* (*gataro*), becoming an entity that embodies the local spirituality penetrating both the waterside and the mountains.

The Myth of the "Curse" of Immortality. The legend of Yao-bikuni is the most beautiful yet cruelest answer Japanese folklore offers to humanity's universal "fear of aging" and "thirst for eternal life." At first glance, immortality seems like the ultimate blessing, but in this tale, it is explicitly depicted as a "curse." Her tragedy is not that she cannot die, but that "everyone other than herself will inevitably die." Left behind in the world as a beautiful teenage girl while watching her beloved ones grow senile and pass away, this overwhelming temporal isolation inflicted upon her an agony worse than death. Her nationwide pilgrimages to perform good deeds (building infrastructure and planting trees) can be interpreted not merely as acts of compassion, but as an agonizing journey of atonement to find some meaning in an endless existence and to sublimate her karma. Wakasa's Kuin-ji Temple and the Concept of "Nyujo". The cave where she is said to have spent her final moments (Yaohime-gu) still remains at Kuin-ji Temple in Obama City, Fukui Prefecture, the terminus of Yao-bikuni's journey. What is particularly noteworthy is that her end is not told as a simple "death (starvation)," but as "Nyujo." Nyujo refers to a high-ranking Buddhist monk entering a deep state of meditation while still alive in order to save sentient beings, becoming an eternal entity (a mummy or Sokushinbutsu). Having been stripped of a physical death by the Ningyo meat, the only way she could "end her existence (or elevate her dimension to something sacred)" was by confining herself to a cave by her own will and renouncing food. The Metaphor of "Yao-bikuni" in Modern Times. In modern subcultures—such as literature, manga, and animation—Yao-bikuni (or her motifs) is an immensely popular subject. Elements like "eternal youth and beauty," "never-ending loneliness," and "the agony of being unable to die" resonate deeply with modern society's fanaticism over anti-aging and the very real social issues of "aging and isolation" in a society with increasing longevity. She is not merely a character from an old folktale, but an eternal heroine who continuously confronts humanity with the ultimate proposition of how we should face time and death.

A type of tsukumogami typical of early modern yokai art. The hair-spear used both as a practical weapon and as a symbol in processions was thought to accrue spiritual potency through associations with masters and tales of valor. In Hyakki Tsurezure Bukuro, Sekien depicted it wielding a wooden mallet, assigning it a specific object-name while drawing on older iconographic bones. The name Yarigechō likely arose where Night Parade motifs from the Muromachi era, Edo antiquarian taste, and the culture of famed implements converged. Modern print editions and nishiki-e varied the image, sometimes stressing the spear’s decorative plumes, yet it lacks distinctive oral lore and is known mainly through pictures and bibliographic notes.

This is a sea spirit of Miyako, often depicted as a mermaid or a talking fish. Legend has it that on the night it was caught by Shimojishima fishermen and roasted over a net, it answered a call from the deep sea, begging for a tsunami to save it. Only a mother and child managed to escape to Irabu Island, and the sunken crater left where the fishermen's home once stood is said to be the origin of the famous Toriike pond. Embodying both the ocean's boundless bounty and its terrifying wrath, its very name is a fusion of the words "sea" and "spirit." Intertwined with the tragic memory of the Great Meiwa Tsunami of 1771, the Yonatama remains a stark warning passed down across the islands to those who would disrespect the sea.

The *Yukijoro* is a highly unique snow woman nurtured by Yamagata, one of Japan's premier heavy snowfall regions. While snow women nationwide are told of as cruel monsters who freeze travelers to death, Yamagata's *Yukijoro* strongly retains "gratitude-type" tales where she rewards human compassion with blessings. In the Oguni region, her true identity is said to be a princess who descended from the moon world with the snow, losing her way back and appearing on nights lit by the snow's glow—a rare archetype blending East Asian moon worship with the snow woman. In folktales, a house that coldly rejects the white-robed woman begging for lodging falls into ruin, while a house that welcomes her warmly is left with the blessing of a lump of gold. The *Yukijoro*'s body melts upon touching human warmth, leaving grace in the wake of her melting. Furthermore, in the Mogami region, there are tales of an *Ubume*-like snow woman trying to hand over a child, or a snow woman leading a cow, showing that the *Yukijoro* does not fit into a single mold. The terror of the freezing winter, and the emotion of a snow country where one cannot survive without nevertheless cherishing the snow, are superimposed on this multifaceted snow woman.

Based on examples by Toriyama Sekien, this image depicts an aged tea kettle manifesting with spiritual authority. Its posture and arrangement inherit compositional methods akin to the Night Parade of One Hundred Demons scrolls, often shown marching alongside Torakakushi and Yarinaga. The name plays on the kinship between chanoyu and Zen, hinting at a caricature of a Buddhist priest. By the logic of mononari, tools long used or neglected accrue ki, appear before people, and inspire awe. Meiji painters continued this iconographic lineage, and yokai catalogues and dictionaries classify it as a type of tsukumogami, though specific local legends are scant. Later commentaries add anecdotes of startling humans, but early records offer little confirmation, so it is understood chiefly through its iconographic tradition.