Hokkaidoほっかいどう

The Ecological Perspective: "People Under the Butterbur Leaves". While the basic overview touched upon the Ainu etymology, this deep dive explores how the Koropokkuru legend is fundamentally tied to the ecology of Hokkaido and Sakhalin. The giant butterbur (*Petasites japonicus var. giganteus*) native to Hokkaido possesses stalks taller than a human adult, with leaves exceeding 1.5 meters in diameter. The custom of repurposing these massive leaves as umbrellas or roofing is common among northern hunter-gatherers, and the Ainu themselves used them daily for shelter from the rain, drying racks, and containers. The image of "little people living under the butterbur" is a direct symbolic manifestation birthed from the sheer proximity and utility of this giant plant in their daily lives. Silent Trade as a Universal Ritual. The core of the Koropokkuru legend—"leaving goods in the dead of night and departing without ever showing their faces" (silent trade)—is not unique to the Ainu. Herodotus recorded silent trade between the Carthaginians and Libyans in his *Histories*, and identical customs have been confirmed among indigenous groups in Africa, Southeast Asia, and the Arctic. In cultural anthropology, this is defined as a "ritualized distancing to exchange goods across linguistic barriers or hostile relations." The Koropokkuru legend can be read as the narrative mythologization of this universal practice, suggesting it reflects a concrete history of trade rather than a mere fantasy of "imaginary little people." Tsuboi and Watase's Indigenous Theory and Its Refutation. During the 1890s, Shozaburo Watase's 1886 "Pit Dwelling = Koropokkuru Theory" and Shogoro Tsuboi's subsequent anthropological hypotheses ignited a massive academic debate that engulfed the entirety of Ainu studies. The academic world was split between the mainstream camp (descending from Siebold) asserting that "Stone Age Japanese were the ancestors of the Ainu," and Tsuboi's camp arguing that "the Koropokkuru were indigenous, and the Ainu were invaders." Tsuboi's popular serialization of his theories in 1895–1896 leaked the academic debate to the general public, mass-producing the "image of the Koropokkuru" in textbooks, novels, and paintings. While post-war archaeology confirmed the "Jomon to Ainu" lineage and entirely debunked Tsuboi's theory, the debate remains a rare historical instance where an academic dispute successfully molded the national imagination. Takuro Segawa's Paradigm Shift: "The Foreign Ainu". The innovation in Takuro Segawa's 2008 book *Who Were the Koropokkuru?* lies in rejecting the binary "indigenous or not" debate and connecting the legend to the concrete history of the Northern Kuril Ainu in the Middle Ages. He highlights the following points: - Silent trade was actually practiced by the Northern Kuril Ainu. - The Northern Kuril Ainu practically utilized pit dwellings into the Middle Ages. - The use of pottery and long-distance travel to gather clay are archaeological facts of the Northern Kuril Ainu. - The Koropokkuru legend exists everywhere *except* the Northern Kurils (as people do not mythologize themselves into "little people"). By rereading the legend not as "imagination" but as a "concrete memory of a different Ainu group," this perspective illuminates the regional differences and historical diversity *within* the Ainu, serving as an ethnographic achievement that deconstructs the monolithic image of the Ainu people. The Departure Tale and the "Ugly Visage" Motif. The story where a curious Ainu youth grabs a Koropokkuru woman's hand, causing the tribe to flee north in shame, belongs to a universal folklore archetype: "contact with another tribe → erroneous intervention → loss of the relationship." Structurally, it is deeply related to the Greek myth of Echo, the Japanese folktale of the Crane's Return of a Favor, and the taboo of Toyotama-hime in the *Kojiki* (where looking upon the true form brings disaster). The separation caused by "seeing what must not be seen" is the mythologization of the folk ethics governing the maintenance of boundaries and respect for distance between different tribes. Modern Children's Literature and the Ethics of Ainu Representation. Satoru Sato's post-war *Korobokkuru Tales* series (1959–) reconstructed the Koropokkuru as a unique, original fantasy world detached from Ainu folklore, becoming a multi-generational classic of Japanese children's literature. Conversely, in the 21st century, there is a growing movement demanding that mainstream works borrowing Ainu culture respect the voices and agency of the Ainu people themselves. The history of the Koropokkuru image is multi-layered, spanning academic controversies, literary creation, commercial branding (e.g., Jaga Pokkuru), and the ethics of cultural representation. Moving forward, it is necessary to move beyond consuming them merely as "cute little mascots" and to acknowledge the profound indigenous history and academic legacy that stands behind them.

The telephone as postwar infrastructure and kaidan device. The basic entry covers the contagious structure of Kashima Reiko's curse; this fuller explanation looks more closely at the medium that carries it: the telephone. In Japan, the spread of black rotary phones into ordinary households rose sharply in the postwar decades, from about 8 percent in 1965 to about 80 percent in 1975. It is unlikely to be a coincidence that a legend emerging in the 1970s chose the device of "a question coming by telephone." The anxiety of a new infrastructure entering the home became part of the legend's core machinery. Where prewar Aka Manto belongs to alleys and night roads, and Hanako-san of the 1980s belongs to the school toilet, Kashima Reiko is distinctive because she violates the postwar private space of the household telephone. From the 1990s onward, the setting expanded into text media such as email and LINE, keeping pace with the evolution of postwar communication infrastructure. The structure of the "Where are your legs?" question. At the center of the Kashima Reiko legend is a question: "Does Kashima-san have legs?" "Where are her legs?" and similar variants. A wrong answer is fatal, but correct replies such as "Kamashi," "Kashima Reiko," "above the waist," or "from above the waist downward" are said to save the listener. Like Aka Manto's "red paper or blue paper" and Kokkuri-san's yes-or-no exchanges, this is a no-win question structure common in children's oral ghost stories. At the same time, it offers an escape route: correct knowledge can save you. Folklorist Noboru Miyata, in Yōkai no minzokugaku (Iwanami Shoten, 1985), argued that question-based children's kaidan satisfy a childhood desire for intellectual advantage, the feeling that those who know the answer survive. The transformation of postwar social memory into ghost story. The theory that Kashima Reiko began with the "1948 Kakogawa American-soldier incident" has not been historically confirmed. Even so, it preserves in ghost-story form a social memory of sexual violence suffered by Japanese women under the U.S. occupation. Postwar U.S.-Japan relations, defeat, occupation, and the security order, left many experiences insufficiently spoken in official discourse. Such unspoken harm can settle into the underground layer of urban legend and surface in the 1970s as a supernatural presence. Folklorist Norio Murakami has discussed this mechanism of social memory turning into kaii, noting that experiences excluded from public memory can remain in the form of ghost stories and spirit possession. Kashima Reiko is a representative example. Contagious curses in the internet age. Kashima Reiko's structure, in which hearing the story makes one part of the curse, became a foundation for the chain-mail culture, internet curses, and creepypasta of the 2000s and beyond. "Forward this email to X people or you will be cursed," "anyone who sees this URL will be cursed": these online curse formulas have their prototype in Kashima Reiko's instantly contagious oral kaidan. Internet-era kaidan such as Kunekune (2003) and Hasshaku-sama (2008) inherit the same device, turning the reader into a participant in the curse. Kashima Reiko therefore played an important mediating role between 1970s oral kaidan and 2000s internet horror. The ecology of Teketeke and Kuchisake-onna. Postwar Japanese children's oral kaidan do not exist as isolated beings. They form an ecology of mutual reference, merger, and branching. Kuchisake-onna (1978), Kashima Reiko (late 1970s), and Teketeke (1980s) follow one another chronologically and share motifs: a damaged female body, a question structure, and a curse aimed at children. In Tōru Tsunemitsu's Gakkō no kaidan (Kodansha KK Bunko, 1990), these stories were gathered under the category of "school kaidan," helping establish them as a single folkloric genre worthy of study. Dandadan and modern transmission. In Yukinobu Tatsu's Dandadan, serialized in Shueisha's Shonen Jump+ from 2021 and adapted for television anime in 2024, Kashima Reiko was reshaped as a major supernatural figure and became familiar again to Generation Z. The adaptation keeps the key elements of the source tradition, the missing lower body, the telephone, and the contagion of the curse, while recasting them in the character language of contemporary shonen manga. From children's oral legend in the postwar 1970s to manga and anime of the 2020s, Kashima Reiko has become a rare urban kaidan transmitted across nearly half a century.

The postwar Japanese motif of the woman who has lost her lower body. The basic description traced Teketeke's places of origin and routes of circulation. A fuller reading places her within a broader cultural field: the postwar Japanese motif of the female ghost with a damaged or incomplete body. Japanese horror repeatedly returns to women whose bodies are not whole. Oiwa bears a disfigured face in Tsuruya Nanboku's Tokaido Yotsuya Kaidan (Bunsei 8, 1825); Kasane bears injuries to face and body in Sanyutei Encho's Shinkei Kasanegafuchi. In the postwar period the pattern reappears in Kuchisake-onna, whose mouth is mutilated, first reported from Gifu in 1979; in Teketeke and Kashima-san, both missing the lower body; and in Hachishaku-sama, whose body is marked by abnormal height. Teketeke belongs to this line, but she is distinctive because she binds the motif to the railway, one of postwar Japan's defining infrastructures. The choice of the sound "teketeke." As a ghost-story name, "Teketeke" represents the sound of crawling on both arms, but the word is doing several things at once. First, the hard t and k consonants suggest the dry impact of hands or elbows striking wood flooring or concrete. Second, the repetition, teke-teke, creates the unease of a pursuer who keeps coming, steadily and continuously. Third, the sound is easy for children to say and reenact. Related names such as "Patapata," "Kotokoto," and "Katakata" follow similar phonological choices. Together they show a folk-acoustic pattern: a creature's movement is named through a two-syllable repeated sound. The line of railway-accident urban legends. Postwar Japan's railways produced many fatal accidents during the years of rapid economic growth, and those deaths became fertile ground for ghost stories. Alongside Teketeke, stories of crossings and tracks have been recorded since the 1970s in many areas: a woman standing behind you if you look back at a crossing, a legless figure at the edge of a platform, a woman waiting beside the tracks who speaks to passersby. In Yokai no minzokugaku (Iwanami Shoten, 1985), the folklorist Noboru Miyata argued that postwar urban infrastructure, including railways, tunnels, and apartment complexes, came to serve as ghost-story spaces in place of older liminal sites such as watersides, crossroads, and mountain passes. Teketeke is one of the most successful figures in this infrastructure-horror lineage. Mutual reference with Kashima-san and the structure of the "answer." One widely circulated defense against Teketeke says that you survive by answering "Kashima-san." This belongs to the same pattern as the countermeasures for Kuchisake-onna, such as "pomade" or bekko candy: the legend builds in a "right answer," drawing children's imaginations into active play. Kashima-san has her own set of responses, including answering "Kamashi" or reciting the full name "Kashima Reiko," and the countermeasures themselves became a fad among children. The pattern can also be read as a secularized schoolyard form of the older Japanese belief in spells and mantras. The 2009 film interpretation. Koji Shiraishi's Teketeke (2009) adopts the Kakogawa, Hyogo origin theory and portrays the source as a woman whose lower body was severed in a postwar railway suicide. Her real name is "Kashima Reiko," directly linking her to Kashima-san. This interpretation recasts the oral tradition's mutual references between Teketeke and Kashima-san as two faces of the same person. With AKB48's Yuko Oshima in the lead, the film also connected the legend to the idol culture of the time. Teketeke therefore became a strong example of a children's oral ghost story from the postwar period being carried into mainstream Heisei-era film horror. Reproduction in the internet age. Since the 2010s, Teketeke has been retold through YouTube ghost-story narration channels, paranormal content on Nico Nico Douga, and short horror videos on TikTok. In the 2020s, Generation Z has received her again as one of the frightening stories once told at school in childhood. Few examples show so clearly how a ghost story can survive while changing media: oral transmission, children's magazines, film, and the internet all become successive carriers of the same fear.

A descriptive version organized from Ainu oral tradition. It wears attushi garments with frayed fibers and frequents human dwellings, especially vacant or old houses. It most often appears around midnight and is felt in bed as pressure on the chest or throat. Its true nature is interpreted as the presence of the dead or a death-tainted impurity, and it is sometimes linked to the general belief that neglecting household cleaning, fire tending, or prayer invites it. Its form is indistinct, spoken of as a shadow or presence, and it is said to withdraw if the light is strengthened or a voice is raised. Its relation to Tohoku’s zashiki-warashi is mentioned only by comparison as a similar “spirit that appears in the sitting room,” without any tales of bringing good fortune.

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.