No cosmogonic or origin narrative is recorded in the cited sources; the shidaidaka appears in local oral tradition across multiple Chūgoku prefectures and is presented in those sources as a localized roadside yōkai and as a member of the mikoshi-nyūdō family.
Reported as a humanoid yōkai whose principal and consistently recorded attribute is variable apparent height: it grows when seen from below or when observers look upward, and becomes shorter when looked downward. The sources classify it as a type of mikoshi-nyūdō, but specific mikoshi-nyūdō physical traits (e.g., bald head, extending neck) are not directly described for the shidaidaka in the provided materials (marked as uncertain in the sources).
Primary behavior is perception-dependent change in apparent stature: looking up causes it to grow taller; looking down causes it to shrink and disappear. Regional narratives add variant behaviors: in a Hazumi folktale hunters are advised to reserve a last bullet in case a shidaidaka appears (narrative tactic to kill it), and in a Matsukawa account a shidaidaka is said to be the boss or true form of a nekomata. The sources treat these latter points as local tale variants rather than universal attributes.
Weaknesses
- conditionObserver looks downward
- otherDependence on observer's gaze (does not grow when not looked up at)
- otherNarrative-specific: vulnerability to being shot (Hazumi hunting tale)
Wards
- conditionDo not look up
- conditionLook progressively downward until it becomes smaller and disappears
- conditionLocal injunction (Sakurae): do not look at it from beneath one's thighs
- otherNarrative-specific protective tactic: reserve a last bullet when hunting (Hazumi tale)
Abumi-guchi
A Japanese yōkai classed as a tsukumogami: an animated stirrup (abumi) depicted in Sekien Toriyama's Gazu Hyakki Tsurezure Bukuro. Traditional accounts say it is formed from a stirrup that belonged to a soldier who fell in battle and that it waits where the stirrup lies for its dead owner to return.
Abura-sumashi
A yōkai spirit from the Amakusa region of Kumamoto Prefecture, Japan, said to inhabit mountain passes. Traditionally explained as the ghost of a person who stole oil, it appears to surprise travelers and is represented in modern media with a straw-coat body and a potato- or stone-like head.
Akaname
Akaname is a Japanese yōkai associated with baths, bathtubs, toilets, and other places where scum and filth accumulate. Traditionally depicted as a child-like creature that licks grime, it functions in folklore as a cautionary figure tied to cleanliness; a few narrative variants cast it as dangerously predatory.
Akateko
Akateko (赤手児, lit. 'red child's hand') is a yōkai from Japanese folklore commonly told as a small, red, disembodied child's hand that appears from trees—especially the Japanese honey locust—and startles travelers; in some regional variants it is accompanied by a specter of a young woman or manifests as paired foot- or leg-like apparitions. Accounts vary between mostly harmless trickster apparition and a violent variant that attacks humans.
Akubōzu
Akubōzu (灰坊主, Akubōzu) is a household yōkai from parts of Akita and Iwate Prefectures in northern Japan said to live in the ashes of the hearth. Sources say they appear when people (notably children) play with or dig in hearth/furnace ash; the figure is cited as part of a broader Tōhoku motif warning against disturbing ash.
Akuma
Akuma (悪魔／あくま) in Japanese sources is an evil spirit, devil, or demon associated with misfortune and mental disturbance. The term appears in Buddhist texts and Heian-period literature and was later used to translate the Christian figure of Satan, as well as the Buddhist Mara.
Akurojin-no-hi
Akurojin-no-hi (悪路神の火, "fire of the god of the bad road") is a flamelike ghost from the folklore of Mie Prefecture, Japan. It is reported to appear on rainy nights; those who encounter it and do not run away are said to become gravely ill. The phenomenon is sparsely documented and is usually compared to will-o'-the-wisp type ghost-lights.
Amabie
Amabie is a mid-19th-century Japanese yogenjū-type wondrous creature attested in kawaraban and related pamphlet culture that emerges from the sea (in canonical accounts) to prophesy about harvests and epidemics and prescribes that its image be drawn and shown to the sick as a protective measure.
Amanojaku
Amanojaku (天邪鬼 / あまのじゃく) is a Japanese yōkai-type being portrayed as a contrarian, heart-reading trickster. Treated in different contexts as a small ogre (ko-oni), a wicked demon (jaki) in Buddhist iconography, and a folkloric spirit that provokes human vice, it appears across regional tales with variable roles from malicious kidnapper to household oddity.
Amefurikozō
Amefurikozō (雨降小僧 or 雨降り小僧) is an Edo-period yōkai figure depicted in classical illustrated and popular print culture as a youthful attendant associated with rain. Classical sources (notably Sekien Toriyama's Konjaku Gazu Zoku Hyakki) present it as a kozō-type servant linked by captional wordplay to a rain deity; later popular literature elaborates its rain-producing role and playful mischief on rainy nights.
Ameonna
Ameonna (雨女, "rain woman") is a figure in Japanese folklore treated as a yōkai associated with rain. Sources depict her both as a rain-calling supernatural being (sometimes helpful in drought) and as a folk label for an unlucky person whom rain seems to follow; a key pictorial source is Toriyama Sekien's Konjaku Hyakki Shūi.
Amorōnagu
Amorōnagu (Amorōnagu / 天降女子) is a tennyo or celestial maiden figure in the folklore of Amami Ōshima (Kagoshima Prefecture, Japan). Attested sources describe her as a heavenly woman who bathes in pools and waterfalls in ravines on the island.
Community Record
- [1]Shidaidaka (Wikipedia). Wikipedia: Shidaidaka (summary and local variant quotations)wiki
- [2]Mikoshi-nyūdō (Wikipedia). Wikipedia: Mikoshi-nyūdō (comparative classification and family traits)wiki
- [3]Wikidata entry: Shidaidaka. Wikidata: Shidaidaka (region classification)wiki
- [4]Japanese Legendary Creatures - Naming Schemes. Ancillary web listing citing regional yōkai traditions (contextual mention)other
- [5]Omamori - Takanyudo monster legends (blog). Contextual folkloric material on mikoshi-nyūdō family (used for comparative context only)other