The yokai of the night road

'Yokai are fallen deities.' This is the thesis Yanagita Kunio laid down in Hitotsume-kozō and Others (1934)^[1]. In ancient Japan, road-side gods, mountain gods, and blacksmithing gods received formal worship. As Buddhism arrived and central authority reorganised the religious landscape, these provincial gods slipped out of the centre — and what remained of their divinity continued in folklore as yokai. Most of the night-road yokai descend from this fall.

The night road is itself a boundary: between village and village, between settlement and mountain, between the human world and the realm beyond. In the era before street lighting, when only the moon lit a country road, the night was wholly given over to the other world. What a traveller met there could be god, beast, dead person, or yokai — there was no need to choose between them. The taxonomies of modern yokai studies came later. At the time, 'something appeared on the night road' was enough.

Yokai appear in three typical modes. First, 'following from behind' — okuri-ōkami, okuri-inu, okuri-chōchin. A presence behind you that vanishes when you turn. Second, 'waiting ahead' — the hitotsume-kozō, the ōnyūdō, the yagyō-san. They block the road. Third, 'distant light' — kitsunebi, hitodama. Lines of flickering light at a distance. Three modes, three bodily senses — the presence at your back, the fear at your face, the light at a distance you cannot measure. The yokai of the night road close around the traveller from all three sides.

The okuri-ōkami^[2] is the wolf that walks behind a traveller on a mountain road at night. The tradition runs from Kantō through Kinki and as far as Kōchi Prefecture. The standard episode: night falls in the mountains; a traveller is walking home alone; he senses something behind him and turns to find, a few dozen metres back, a wolf walking quietly in his wake. If he runs, it catches him and kills. If he stops, it overtakes him and blocks the road. The only successful response is to sit down as if simply resting — and then the wolf, having 'sent the traveller home', departs.

The folk core here matters. The okuri-ōkami sends; it does not hunt. It walks behind with the intent of seeing the human home. But the moment the traveller shows weakness — falls, runs — its animal nature wakes and the encounter turns violent. The line 'home' separates 'sending' from 'killing'. If the okuri-ōkami were purely a beast, the sending behaviour would not occur; if purely a deity, it would protect without condition. Its place is between, and that ambiguity is the signature of a 'fallen deity'.

Variants exist across the country. The okuri-inu (sending dog) from Tōhoku through Kyushu; the okuri-itachi (sending weasel) of the Chūgoku and Shikoku regions; the okuri-chōchin (a lantern that follows with no one carrying it) in Hokuriku and Kansai; the okuri-hyōshigi (only the sound of wooden clappers follows). What they share is the structure: only the presence, the sound, the light is behind you — turn around and there is nothing — yet something is undeniably there. It is one of the deepest fears the night road can produce. Modern Japanese uses 'okuri-ōkami' as an idiom for a man who follows a woman home with bad intent — a metaphor descended directly from this folklore.

The kitsunebi^[3] is an unaccounted bluish-white light that appears on hillsides, by water, and in rice fields at night. Like lanterns in a line, the fires flicker on and off, and vanish as one approaches. Most common from spring through autumn, and especially on humid summer nights. The line of lights was called 'the fox's wedding', 'the fox's wedding feast', and so on; whether seeing it was a good or bad omen varied by region.

The most famous kitsunebi in Edo was that of Ōji Inari Shrine in what is now Kita Ward, Tokyo, on New Year's Eve. The story: all the foxes of the Kantō region gather under the great hackberry tree at Ōji Inari on the night of the year's end, dress themselves formally, and go up to the shrine — the lanterns of their procession are the kitsunebi. Hiroshige's One Hundred Famous Views of Edo (1856-58) made the scene iconic in his print 'The Hackberry Tree at Ōji on New Year's Eve, with Foxes'. From 1993 the local merchants' association revived the 'Procession of Foxes': masked participants now walk from the local shopping street to Ōji Inari on the eve. A folk practice given a modern festival life.

Scientific explanations have been proposed since the Edo period. Phosphine — phosphorus released from decaying organic matter in wetlands, spontaneously combusting. Bioluminescent fungi. Ball lightning. Light from distant lamps refracted by atmospheric mirage. Yet none accounts for the kilometre-distant sightings that the tradition consistently records. The kitsunebi remains a 'mystery' for exactly this reason: it sits just beyond rational explanation.

The hitotsume-kozō^[4] is a child-figure with a single eye in the centre of the forehead. He turns up on night roads, mountain passes, and toilets. He 'simply appears suddenly to startle' — generally one of the harmless yokai. Toriyama Sekien's illustration of the Edo period, combined with Kantō folk practice, set the modern form.

The folklore reading goes deep. Yanagita Kunio's Hitotsume-kozō and Others (1934)^[1] read this figure as a fallen mountain deity and an echo of the tatara ironworking god. In ancient Japan, ironworkers who tended the smelting furnace would shield one eye from the heat; long exposure damaged that eye for many of them. The communities themselves were often isolated in the mountains and subject to social prejudice. The single eye crystallises both the divine claim and the social stigma. The Kantō practice of the 'kotobayō' — hanging eye-shaped baskets from the eaves on the eighth of the second month and the eighth of the twelfth, to keep the hitotsume-kozō away — supports the reading.

The ōnyūdō^[6] is the giant monk-figure who appears on night roads, passes, and bridges. Sizes range from around two metres to mountain-scale, with great regional variation. The best-known variant is the 'miage-nyūdō' — the more you look up at it, the larger it grows, until it covers the sky. The folk countermeasure: say first 'miekoshitari' ('I have looked higher than you'), and the yokai vanishes. The Yokkaichi Matsuri in Mie Prefecture features a 3.9-metre mechanical ōnyūdō float that keeps the tradition alive in living festival form.

The rokurokubi^[5] is less a road yokai than an inn yokai, but it belongs to the same boundary. Two variants — the long-necked rokurokubi proper, and the 'nuke-kubi' whose head detaches and flies away. The Chinese 'fei-tou-man' is one theorised source. The figure appears in Ueda Akinari's Ugetsu Monogatari, in Toriyama Sekien's Gazu Hyakki Yagyō, and in Edo street shows and magic-lantern entertainments. Lafcadio Hearn^[10]'s 'Rokurokubi' in Kwaidan^[11] reworks it as a flesh-eating predator met in the mountains, carrying the Japanese yokai image into the English-speaking world.

The shapeshifting tanuki^[7] takes human form. The earliest documentary reference is in the Nihon Shoki under Empress Suiko (627): 'In Mutsu there is a badger that changes into a man and sings' — fourteen hundred years on the record. Edo-period folklore equips the tanuki with belly-drumming (tanuki-bayashi), a gift for turning leaves into money, and a vast scrotum it spreads out like cloth for disguises — a finely textured imagination.

Individual tanuki are famous regionally. Sadō's Danzaburō, who learned shapeshifting to console the exiled Emperor Juntoku. Kagawa's Tasaburō, who fought for the Heike at the battle of Yashima. Gunma's Bunbuku Chagama — a tanuki who took the form of the temple's tea kettle to help the abbot. The folk proverb 'foxes seven changes, tanuki eight changes' (狐七化け狸八化け) ranks the tanuki above the fox in shapeshifting skill.

The bakeneko^[8] is the cat that transforms with age. The age threshold varies regionally: twelve years in Ibaraki and Nagano, thirteen in Okinawa, more than seven in Hiroshima. The biggest popular work of the late Edo period was the 'Nabeshima bakeneko disturbance' — a cat carrying the resentment of a murdered samurai's mother curses the Nabeshima domain, in a story that became a major hit in oral storytelling (kōdan) and on the kabuki stage. The classic scene: a cat in human female form licking lamp oil, its true nature revealed by its shadow on the wall. The contrast between bake-danuki and bakeneko — tanuki transform in groups, cheerfully; cats transform singly and darkly — captures a two-sidedness in the Edo-period image of animals.

The yagyō-san^[9] is a particular yokai transmitted primarily in Tokushima Prefecture (the old Awa province). The form is a one-eyed demon riding a headless horse — or, in the Hachiōji (Tokyo) variant tied to the fall of Takatsuki Castle, a princess on the same headless mount. The yagyō-san appears only on specific calendar dates: New Year's Eve, Setsubun, kōshin nights, and the calendrical 'yagyō-bi' (night-procession days), all of which derive from Chinese calendrical learning.

The folk countermeasure for an encounter is specific: place a straw sandal on the head and lie flat on the ground. The yagyō-san passes by. The logic appears to be that the human, in adopting an upside-down posture, has temporarily suspended their status as human. That the available response is a single act, simple and concrete, preserves the older bodily fear of the encounter.

Yagyō-san is read as a regional folk descent of the medieval concept of 'Hyakki Yagyō' — the night-procession of the hundred. At the Heian-aristocratic level, the Konjaku Monogatari-shū records the story of the monk Sōei meeting a hyakki yagyō procession and escaping by reciting the Son'shō Dhāraṇī. As the concept moved down into the provinces it concentrated into a single concrete figure: 'a one-eyed demon on a headless horse on a particular night'. The reduction of an abstract central concept into a specific provincial yokai is a classic folk movement. The Hyakki Yagyō itself is the subject of the sixth-chapter cluster in this feature.

From the Meiji period onward, with the spread of street lighting and urbanisation, the night-road yokai slowly lost the spaces they could appear in. Gas lighting reached the major cities in the 1880s; electric lighting was widespread by the early 1900s. Streets lit by lamps cannot hold a kitsunebi; an ōnyūdō no longer has darkness to rise into — in a literal sense, the yokai were dispersed by illumination.

But they did not vanish completely. The urban legends of the postwar Shōwa era — 'the red cape', the 'slit-mouthed woman' of 1979 — carry the night-road yokai lineage forward. The Sadako-style ghost in the toilet, the school staircase's 'seven mysteries', the haunting of the abandoned building — contemporary Japanese kaidan all preserve the same structure: 'something met on the night road'. Only the form has changed; the folk logic of the encounter at the boundary between people and the world beyond persists.

In mountain country and the regions, new night-road yokai continue to be born. From the 1980s onward, as car ownership spread, the 'hitchhiker ghost' story circulated: a woman on a mountain road waves at a car; the driver picks her up; when he turns to look, she is gone. This is the okuri-ōkami structure of 'something follows from behind' translated onto the automobile. Folklore absorbs technology and changes shape — but the underlying claim, that something appears on the night road, has not changed.

The best-organised modern destination is Ōji Inari Shrine in Kita Ward, Tokyo, for the 'Ōji Procession of Foxes' on New Year's Eve. Revived in 1993, the procession sends masked participants from the local shopping street to the shrine — a folkloric revival that turns the kitsunebi of an Edo-period woodblock print into a present-day festival.

The Yokkaichi Matsuri in Mie Prefecture (held around the first Sunday of August) features the mechanical ōnyūdō float — 3.9 metres tall, with a neck that telescopes out to startle children. A rare case of the Edo-period 'miage-nyūdō' tradition preserved as a living festival. In Tokushima Prefecture (old Awa, now centred on Tokushima City), local museums and archives hold the yagyō-san tradition for those interested in seeking it out on the relevant calendrical nights.

For shapeshifting tanuki, the central sites are Sadō (Niigata), the four provinces of Shikoku, and Gunma. Mōrin-ji Temple in Tatebayashi, Gunma, still holds the original 'Bunbuku Chagama' tea kettle. For bakeneko, Saga Prefecture is the heart — the Nabeshima family's ancestral temple, the origin of the Nabeshima bakeneko disturbance, observes a related event on 16 August. The kotobayō practice of hanging eye-baskets from the eaves on the eighth of the second and twelfth months — to keep the hitotsume-kozō away — survives in parts of Kantō.

If you are actually planning to walk a night road, the modern conclusion is straightforward: avoid the unlit mountain paths. The folk taboos — do not travel on the yagyō-bi; do not look back on a dark pass — read as superstition to a contemporary, but they were also a means of transmitting real hazard information. Wildlife encounters, getting lost, sudden changes in weather: these risks are still real. 'On the night mountain road, if you sense something behind you, do not turn — keep walking' is a folk response to the yokai, and it is a sensible response to a wild animal.