Urban Legends and Alternative Theories: A Catalog

One long-running theory holds that the ancestors of the people of the Japanese archipelago were one of the Lost Ten Tribes of Israel. Proponents cite a list of cultural parallels: the structural resemblance between Shinto shrines and the Jewish Tabernacle, the close similarity between the mikoshi (portable shrine) and the Ark of the Covenant, and the parallels between the Gion Festival and the Festival of Zion.

Genomic analysis has not confirmed any particular genetic affinity between Japanese and Jewish populations. The possibility that the Hata clan, a powerful immigrant lineage, carried cultural elements along the Silk Road cannot be entirely dismissed. Even without a bloodline connection, culture itself may have traveled the ancient roads.

This theory posits that the Japanese imperial lineage traces its origins to the Sumerian civilization. The phonetic resemblance between “Sumera Mikoto,” an archaic title for the Emperor, and “Sumer” is cited, along with shared SOV word order, agglutinative grammar, and the sixteen-petal chrysanthemum crest found in both cultures.

No genetic data links Japanese populations to the Mesopotamian region, and the phonetic similarities are generally attributed to coincidence. Even so, since Atsuo Mishima systematized the theory in 1927 it has endured as a “hidden truth,” and its romantic appeal is part of why.

The Takeuchi Documents are an extraordinary set of ancient texts claiming that the imperial family descended from the cosmos and that Japan was the cradle of all world civilizations. According to these documents, Christ, Moses, and the Buddha all journeyed to Japan to serve the Emperor.

In a 1936 trial the documents were prosecuted for lese-majeste, and the historian Kōkichi Kanō judged them to be forgeries. As a projection of the wish that Japan stood at the center of the world, the Takeuchi Documents remain culturally revealing: a record of what people wanted to have been true.

This theory holds that a sunken continental civilization in the Pacific was the wellspring of Japanese culture. The underwater formations near Yonaguni Island in Okinawa are cited as remnants of the Mu civilization.

Geology records no continental submersion in the Pacific, and the Yonaguni underwater structures are most plausibly explained as natural erosion features. Genomic data showing that Jōmon DNA shares affinity with Southeast Asia’s Hoabinhian culture does, however, lend scientific credibility to a southern maritime route of migration.

In the thirteenth century BCE, the Hittite Empire reigned over the Anatolian Plateau (modern Turkey). Its supreme deity was not a male god but a sun goddess: the Sun Goddess of Arinna. She lit the world, guarded royal authority and granted fertility. Set those attributes side by side, and the pattern is one readers of Japanese mythology already know. The resemblance to Amaterasu Ōmikami is close.

Anyone inclined to call the parallel coincidence has a second myth to contend with: the Hittite myth of Telepinu. The agricultural god Telepinu flies into a rage and vanishes. The earth withers, livestock perish, and even the gods go hungry. The world is plunged into darkness and barrenness. The gods dispatch a bee to find Telepinu, and ritual appeases his anger; only then does abundance return to the world.

Overlay this on the Ama-no-Iwato (Heavenly Rock Cave) myth. Amaterasu retreats into the cave, the world is shrouded in darkness, and the eight million gods devise a stratagem to lure the goddess back into the light. The three-act structure—divine absence, world crisis, ritual of return—aligns closely across 3,000 years and 8,000 kilometers.

Here the Hata clan enters the picture: the largest immigrant lineage in ancient Japanese history, the Hata (hatauji). The etymology of their name is debated, but one hypothesis holds that Hata derives from Hatti, the Hittite people’s name for themselves. The Hittite Empire collapsed around 1200 BCE, and its people scattered, carrying their technology and memory to distant lands.

The Hittites’ greatest legacy to human history was the technology of iron smelting. In an age of bronze, iron gave them an overwhelming advantage, and after the empire fell that technology diffused across Eurasia—east along the Silk Road, east across the steppe. The Hata clan is known precisely as the lineage that brought advanced metallurgical techniques to Japan. Based in Uzumasa, Kyoto, they established continental technologies on the archipelago: casting, sericulture, civil engineering.

Suppose the Hata clan were bearers of Hittite cultural memory. Suppose that not only iron technology but the worship of a sun goddess and the myth of divine retreat and return passed through generations of oral tradition to reach the archipelago. The Ama-no-Iwato myth may not be a uniquely Japanese creation but the last stop of a story carried for thousands of years from Anatolia to the eastern edge of Asia.

Of course, structural similarity between myths is not proof of direct transmission. One counterargument holds that divine absence and return is a universal pattern in agricultural mythologies worldwide—Greek Demeter and Persephone, Mesopotamian Inanna’s descent to the underworld. We are a species that retells the turning seasons as the death and rebirth of a god.

One point goes beyond structural resemblance. A female sun deity as the supreme god is very rare among the world’s mythological systems. Egypt’s Ra, Greece’s Helios and India’s Surya are all male gods. Civilizations that venerate the sun as a goddess number essentially two: the Hittites and Japan. Can this “coincidence of exceptions” truly be explained by chance?

A sun goddess from Anatolia, crossing the Silk Road with iron, taking her throne again on the Japanese archipelago as Amaterasu: perhaps the hypothesis is too grand. But if it is true, the winter solstice sunlight that streams into the inner sanctum of Ise Grand Shrine may have fallen at the same angle into the temples of Hattusa three thousand years ago.

A name spoken without a second thought: Nippon. Five thousand years ago, on the alluvial plain of Mesopotamia, a holy city carried a name that overlaps with that sound. Nippur was the religious capital where Enlil, the supreme god, held his seat, venerated by all the Sumerian city-states across their political rivalries. Royal legitimacy was established only when sanctioned at the temple of Nippur. Nippur was a center not of political power but of sacred authority. Japan, too, has upheld the Emperor not as a political sovereign but as a ritual and sacral authority. Is this structural parallel merely coincidental?

Historians generally place the formal adoption of the national name Nihon (Japan) under Emperor Tenmu in the late seventh century. Tenmu was no ordinary statesman. After seizing power in the Jinshin War, he ordered the compilation of the Kojiki and Nihon Shoki, unifying the disparate mythological traditions held by individual clans into a single national epic. Tenmu was, in other words, an editor of narrative. In the course of weaving scattered memories into one story of a nation, he gave this archipelago the sound Nippon. That he knew of the Mesopotamian echoes that had traveled via the continent, and layered the resonance of Nippur’s holy city into the new national name, cannot be entirely ruled out.

Structural parallels in language give the hypothesis a curious depth. Sumerian and Japanese both use SOV word order (subject-object-verb) and both are classed as agglutinative languages, building meaning by appending suffixes to word stems. This linguistic type is by no means a global majority. The phonetic similarity between “Sumera Mikoto,” the archaic title for the Emperor, and “Sumer” has been noted repeatedly since the Meiji era. No genetic linguistic relationship has been demonstrated, though the absence of proof is not the same as the absence of connection.

Of course, phonetic resemblance alone is perilous ground for arguing direct civilizational contact. The mainstream etymology derives Nippon from the kanji reading Hi no Moto, origin of the sun, and that explanation commands overwhelming scholarly support. The question here is not the correct etymology but the intent behind the naming. When Emperor Tenmu chose a national name meaning “the place where the sun rises” for diplomatic use with China, the sound itself may have carried the memory of a more ancient holy city. Folding several layers of meaning into a single word was no rarity in the naming arts of antiquity.

No genetic evidence of direct ethnic migration from Mesopotamia to the Japanese archipelago has been found to date. Cultural memory, though, travels at speeds and along routes different from those of human migration. Fragments of stories drifted over millennia to this archipelago at the eastern terminus of the Silk Road, and an editor named Tenmu crystallized them into a single national name. Read that way, the four syllables of Nippon begin to sound like more than a name—and the echo of the holy city of Nippur may still be inscribed on the cover of a Japanese passport.

Japanese males carry the Y-chromosome haplogroup D at an unusually high frequency—a globally rare lineage concentrated among Japanese and Tibetan populations. This has been claimed as evidence of a special bloodline.

The distribution of haplogroup D is a scientific fact (found in roughly 35–40% of Japanese males), but cultural readings such as “genetic proof of the heavenly descent lineage” have no basis in genetics. Haplogroup D appears at high frequency among Jōmon populations and at much lower rates among the continental Yayoi immigrants, which marks it as a signature of the archipelago’s most ancient inhabitants.

In the third year of the Kyōwa era (1803), a strange vessel washed ashore on a beach in Hitachi Province. It was round, iron-hulled, fitted with glass windows, and inscribed inside with unknown characters. A beautiful woman sat within, clutching a box. The Utsuro-bune (hollow ship) incident was recorded in several Edo-period texts, including Tōen Shōsetsu and Ume no Chiri.

The account draws attention worldwide because the vessel it describes resembles modern UFO reports so closely: a disc-shaped sealed structure, an unknown writing system, an occupant who spoke no recognizable language. What did people in early nineteenth-century Japan actually witness?

The prevailing historical explanation is mistaken identity: a drifting foreign vessel, perhaps Russian. That several independent documents carry similar descriptions is worth noting. Read not as a UFO encounter but as a cultural history of perception—how Edo-period people recorded the unknown—the Utsuro-bune looks quite different.

In Shingō Village (formerly Herai Village) in Aomori Prefecture stands what is claimed to be “the Tomb of Christ.” According to local legend, Jesus Christ escaped crucifixion, traveled to Japan via Siberia, and lived in this village until the age of 106.

The evidence cited includes passages from the Takeuchi Documents, the phonetic similarity between “Herai” and “Hebrew,” and a Bon dance song called “Nanyado Yara,” which some claim can be decoded as Hebrew.

Scholars assess the Takeuchi Documents themselves as modern fabrications, and the scientific basis is thin. Yet the question of why a Christ legend took root in a remote corner of Japan says something about a recurring wish to tie one’s own land to the sacred and the distant. The village still holds an annual Christ Festival, and the Israeli ambassador has attended.

On June 10, 1944, the painter Tenmei Okamoto fell into automatic writing at Makada Shrine in Narita, Chiba Prefecture. His right hand moved of its own accord, producing illegible strings of Chinese numerals and symbols. This was the genesis of the Hitsuki Shinji (Sun-Moon Revelation), a prophetic text spanning thirty-nine volumes.

The document prophesies a Tatekae-Tatenoshi, the collapse and rebuilding of the existing order. On the reading of its interpreter Shinichi Nakaya, it describes an 800-year cycle of civilizational succession (the Gaia Principle), foreseeing the decline of Anglo-Saxon civilization and the rise of a new civilization originating in Japan.

The end point it describes is Miroku no Yo, the Age of Maitreya: a future society in which science and spirituality are not divided, half spiritual and half material. It would be easy to dismiss this as occultism. Yet the underlying concern, that material civilization has limits, is structurally close to the SDGs and to degrowth theory. More than the truth or falsehood of the prophecy, the value in reading this document lies in seeing how writers in Japan eighty years ago imagined civilizational transformation.

The Miraikki (Record of the Future), attributed to Prince Shōtoku (574–622 CE), belongs to the oldest lineage of prophetic literature in Japan. In Book Seven of The Tale of the Heike, warrior-monks of Miidera Temple declare that events were “foretold in the Prince’s Record of the Future,” evidence that by at least the twelfth century the idea of a Shōtoku prophecy was widely believed.

At the heart of the transmitted prophecy is the concept of “Kuhanda,” a term from Buddhist scripture for demons that drain human vitality. The prophecy holds that Japan is struck by Kuhanda uprisings in 200-year cycles. Applied to the record, the cycle aligns with pivotal moments in Japanese history: the Jōkyū Disturbance (1221), the Ōnin War (1467), and the Meiji Restoration (1868).

No original manuscript of the Miraikki survives, and the prevailing scholarly view holds it to be a Kamakura- or Muromachi-period composition with layers of later embellishment. What matters is that the Shōtoku prophecy has been reproduced continuously for over 1,400 years. That the Prince’s words are invoked with every national crisis may point to a durable habit in public discourse: the need to believe that this crisis was already foreseen.

Faith in Prince Shōtoku’s prophecy is no relic of the past. Claims that the Prince foretold the crisis of 20XX surface in urban legends whenever danger looms. In 2025 similar claims circulated widely, though the content of the prophecy had been rewritten to suit the times. There is no scientific basis for any of it; as a prophetic operating system updated for 1,400 years, it shows how crisis is talked about in Japan.

Japan is often described as having no intelligence agency comparable to the CIA or MI6. Taken together, though, the Cabinet Intelligence and Research Office (CIRO), the Public Security Intelligence Agency, the National Police Agency’s Security Bureau, and the Defense Ministry’s Directorate for Signals Intelligence amount to a substantial intelligence apparatus. The Specially Designated Secrets Act of 2013 strengthened information control further.

CIRO employs approximately 200 personnel and reports directly to the Prime Minister. Much of its activity, on this account, is directed not at intelligence gathering but at media management. According to testimony from former CIRO personnel, core duties include collecting scandal information on government ministries, investigating opposition politicians, and gaining advance knowledge of media reporting.

The Special Investigation Department of the Tokyo District Public Prosecutors Office, known informally as the Tokusō, is equally indispensable to any discussion of Japanese intelligence. It began as GHQ’s unit for uncovering concealed wartime assets and has since served as the most powerful investigative body prosecuting political and corporate corruption. The breadth of its prosecutorial discretion has drawn criticism as “hostage justice,” and the choice of whom to prosecute and whom to overlook carries an inherent political function.

In 2010 a Japan Coast Guard officer leaked footage of a Chinese fishing vessel collision near the Senkaku Islands to YouTube. The Edward Snowden revelations of 2013 suggested that Japan maintained a cooperative relationship approaching that of the NSA’s Five Eyes surveillance network. A net of information control certainly exists; the question is whether it serves to protect the public or to conceal things from the public, a distinction invisible from the outside.

Herbert George Wells (1866–1946) is called the father of science fiction, but his work is precise enough about what was coming to be worth taking seriously as more than imagination. In The World Set Free (1914) he envisioned atomic bombs. In The Time Machine (1895) he foresaw humanity’s bifurcation through class stratification. In The Shape of Things to Come (1933) he described a “World Brain” resembling the internet.

Wells was a central figure in the Fabian Society and an advocate of world government. The Open Conspiracy (1928) set out openly a case for gradual world governance by an intellectual elite. In the urban legend sphere, the book is read as a blueprint of the ruling class.

This is where “predictive programming” enters, the hypothesis that fiction is used to condition the public for events to come. Hideaki Anno’s Shin Godzilla (2016) depicted a paralysis of the capital’s functions and a bureaucratic rigidity that resembled the Japanese government’s response during the COVID pandemic. Sakyō Komatsu’s Japan Sinks (1973), with its narrative of national catastrophe and loss, was read again with new urgency after the 2011 disaster.

Whether one reads this as mass manipulation by the ruling class or as one sharp mind anticipating the zeitgeist depends on the interpreter’s stance. Fiction imitates reality, and reality sometimes imitates fiction. Stories do not prophesy; stories shape human behavior, and the prophecy then fulfills itself. That is the structure of the self-fulfilling prophecy.

In August 2019 a fourteen-year-old Indian boy named Abhigya Anand uploaded a YouTube video that would draw global attention after the 2020 pandemic. Working from Jyotish, the ancient Indian system of astronomical astrology, he predicted that “a global crisis will occur between November 2019 and March–April 2020.”

Jyotish, rooted in the Vedic texts, is India’s traditional system of astronomical astrology; the word itself means “the science of light” in Sanskrit. It systematizes correspondences between planetary configurations (the Dasha system) and terrestrial events, and is still taught as a formal university course in India. Anand’s prediction rested on the conjunction of Jupiter and Saturn and the positions of the lunar nodes (Rahu and Ketu).

No mechanism has been confirmed by which planetary alignments cause terrestrial epidemics. Astrology is generally understood to be sustained by the Barnum effect (a cognitive bias in which vague statements are perceived as personally relevant) and by confirmation bias (the tendency to remember only predictions that come true). Anand’s “hit” was most likely a vague prediction matched to an event after the fact.

Jyotish nonetheless draws on a long tradition of astronomical observation and calculation. In the Surya Siddhanta tradition, the sidereal year was taken as 365.25875 days, close to the modern sidereal-year value of 365.25636 days. This like-for-like comparison illustrates the sophistication of the astronomical calculations; it does not validate astrological prediction.

Anand’s case keeps working as an urban legend because its narrative structure—the experts got it wrong and a boy’s prophecy got it right—satisfies distrust of authority and longing for hidden wisdom at once. For people around the world whose trust in public institutions had been shaken by the pandemic, a fourteen-year-old Indian boy became a figure for knowledge untouched by institutions.

Before reading further: “Tartaria” as it circulates online today is not a recognized historical empire. It is a contemporary pseudo-historical internet folklore—dubbed by Bloomberg CityLab “the QAnon of architecture”—that has spread on YouTube and social media since around 2016, weaving together genuine cartographic curiosities and selectively misread building photographs. We trace it here as a story about why people are drawn to such stories, not as a historical claim.

On Western maps from before the eighteenth century, the northern half of the Eurasian continent, from Siberia to Central Asia, carries a vast territory labeled “Grande Tartarie” (Great Tartary). The first edition of the Encyclopaedia Britannica in 1771 includes an entry for “Tartary.” From the nineteenth century onward the term gradually fell out of use in Western geography, replaced by more specific ethnographic and political names as European knowledge of Inner Asia grew.

Adherents of the Tartarian Empire theory ask why it was erased. Their answer is the “Mud Flood” hypothesis: a massive deluge of mud, or tectonic upheaval caused by a pole shift, struck in the late eighteenth to nineteenth century and buried the advanced civilization of Tartaria. As evidence they point to the worldwide phenomenon of historical buildings whose ground floors sit below street level.

More radical claims follow within the same online milieu. According to believers, Tartaria possessed free energy technology, and the great nineteenth-century buildings—World’s Fair pavilions, cathedrals, grand civic structures—were remnants of the Tartarian civilization, with modern history falsely claiming credit for constructing them. Energy technology based on the ether (a hypothetical medium once thought to permeate the cosmos) was, in their telling, nearly rediscovered by Nikola Tesla before being suppressed. That claim is woven together with verified episodes from Tesla’s life, the demolition of Wardenclyffe Tower and the FBI’s handling of his papers after his 1943 death, to make the whole feel like evidence.

Mainstream history and architecture answer differently. In academic usage, “Tartary” was a generic Western umbrella for the nomadic peoples of the post-Mongol Eurasian steppe, not the name of a unified state, and never claimed as such by its inhabitants. The supposed evidence of buried buildings is well explained by documented urban grade-raising projects (Chicago famously raised entire city blocks above the swampy lakeshore between 1855 and 1870 to install sewers) and by ordinary sediment accumulation. No physical basis for ether-based free energy has ever been demonstrated. The grand Tartarian civic buildings can, case after case, be traced to named architects and contractors, dated invoices and surviving construction photographs in municipal archives.

Yet behind the Tartarian theory’s rapid expansion across social media lies a legitimate question, even when the answer it gives is a fantasy. If the adage that history is written by the victors holds, then unwritten history certainly exists. The extent to which colonialism falsified the histories of non-Western civilizations has been academically documented. The Tartarian theory is that suspicion pushed to an extreme: a real anxiety about whose past gets recorded, dressed in pseudo-historical clothing. Why are people drawn to it? Perhaps because the stately ornament of nineteenth-century civic architecture genuinely does look “too good to be ours” to a present that has stopped building that way. The architectural historian Zach Mortice traces that discontent directly. The truth the theory is fumbling for is not a vanished empire. It is the suspicion that something has been lost in how we make and remember our cities.

In the fourth year of Keiō (1868), Edo Castle was surrendered without bloodshed. When the forces of the new government entered the castle, the gold vaults were nearly empty. The vast wealth of the Tokugawa Shogunate, which had ruled Japan for 265 years, had vanished. Where did it go?

At the heart of the buried treasure legend stands Oguri Tadamasa, the Shogunate’s Commissioner of Finance. Oguri managed enormous funds in the final years of the regime, yet he spoke not a word about the fate of those assets before the Meiji government executed him. The prevailing theory places the treasure near Mount Akagi in Gunma Prefecture, supported by encrypted maps said to have survived from the end of the Edo period.

Modern estimates place the total value of the Tokugawa treasure at approximately 3,600 trillion yen. The figure is derived from cumulative output of the Sado Gold Mine and Iwami Silver Mine, outstanding loans to feudal domains, and trade balance calculations. The estimate is itself speculative.

Multiple organizations have nonetheless mounted serious searches since the Meiji era: former Imperial Japanese Army operatives, postwar investigations by GHQ (with suggested connections to the so-called M-Fund), and a large-scale excavation project by the TBS television network in the 2000s. None of them produced a definitive find.

Commentators such as Akio Sekiguchi hold that the fate of the Tokugawa treasure connects to Japan’s postwar power structure. The M-Fund—a secret fund allegedly drawn from former Japanese military assets seized by GHQ during the occupation—is known indirectly through several fraud cases. That the Tokyo District Public Prosecutors’ Special Investigation Department traces its origins to GHQ’s Concealed Assets Investigation Unit is a matter of official record. Rather than asking where the treasure physically lies, asking which power structure absorbed it may bring us closer to the truth of history.

Palantir Technologies was founded in 2003 by Peter Thiel, a co-founder of PayPal, with seed capital from In-Q-Tel, the CIA’s venture investment arm. It built the world’s most powerful intelligence data-analysis platform.

Palantir’s system Gotham is used by the CIA, NSA, FBI, and U.S. Special Operations Command. It integrates vast streams of surveillance data—intercepted communications, satellite imagery, financial transactions, social media posts—to identify threats in real time. It has been credited with helping locate Osama bin Laden’s hiding place.

In the 2022 Ukraine war, Palantir’s capabilities entered a new phase. Satellite imagery and electronic intelligence are fused in real time to recreate the battlefield as a digital twin. Artillery impact prediction, enemy force tracking and supply route interdiction are all settled within seconds with AI assistance. Palantir CEO Alex Karp stated that “this technology has dramatically improved the survival rate of Ukrainian forces.”

A question persists. When AI analyzes battlefield data and proposes that a particular building be struck, who makes the final determination whether civilians are inside it? Palantir asserts that the human-in-the-loop principle is maintained: a human always renders the final judgment. Yet when the speed of battle outpaces the speed of human deliberation, will the human role shrink to pressing “approve”?

The 2025 Osaka Expo featured participation from multiple military technology companies. Military-to-civilian technology transfer is conventionally put at about thirty years. The internet, GPS and Siri all began as military technologies. When Palantir’s real-time situational awareness technology is adapted for civilian use—urban traffic management, predictive policing, pandemic response—will it be a useful tool or the ultimate surveillance apparatus? Which of the two it becomes depends not on the technology but on the society that wields it.

In 1986, off the southern coast of Yonaguni Island, Okinawa, the diver Kihachirō Aratake found an anomalous structure on the seabed. It lies at a depth of approximately 25 meters and measures roughly 100 meters long, 60 wide and 25 tall: a colossal stepped stone structure. Right-angled walls, orderly terraces, groove-like passages—geometry that seems impossible to attribute to nature alone.

Masaaki Kimura, then a professor at the University of the Ryukyus, argued that the structure is an artificial ruin. Stepped terraces, circular depressions resembling post holes, grooves that appear to be drainage channels, and what he termed a turtle relief on the rock face cannot, Kimura contended, be explained by natural erosion alone. If the structure is artificial, it must have been built on dry land at the end of the last glacial period (approximately 10,000 years ago), when sea levels were significantly lower. That would make it older than any known stone civilization: 7,000 years older than the ziggurats of Mesopotamia, 5,000 years older than the pyramids of Egypt.

Most geologists remain cautious. The bedrock of Yonaguni Island consists of alternating layers of sandstone and mudstone, and rock of that type erodes naturally along joints (regular fracture patterns) into linear and stepped formations. The geologist Robert Schoch of Boston University, after an on-site investigation, concluded that “the features exhibit characteristics of both natural formations and human modification.” Partial working of a natural rock base is therefore possible, but evidence that the entire structure is artificial has not been found.

The relevant fact is the sea level of 10,000 years ago. During the last glacial period, sea levels were more than 120 meters lower than today, and Yonaguni Island was connected to Taiwan by land. This stretch of sea, at the northern edge of what is called Sundaland (see “The Mu Continent and the Pacific Route Theory,” this chapter), may have been a critical juncture on human migration routes. Beyond the binary of ruin or natural formation, the question of what was happening in these waters during the last ice age holds genuine scientific significance.

As of 2024 the Yonaguni underwater structure has not received official recognition as an archaeological site from the Japanese government. The academic verdict remains open, and that openness is part of why the site holds attention. On the timescale of Earth’s history, dry land is a temporary condition. Land where people once walked now lies beneath the sea. We still barely know what sleeps on that seabed.

In 1949, on Mount Kintori in the Rokkō mountain range of Hyōgo Prefecture, an electrical engineer named Satsuki Narasaki said a mountain hunter named Hira Toji had shown him a strange scroll. The scroll bore an unknown script arranged in spiral patterns. Narasaki transcribed it and named it the Katakamuna Documents. The original vanished along with the hunter and has never been seen again. What follows is among the more intellectually interesting Japanese urban legends.

What Narasaki claimed to have decoded is far-reaching. On his interpretation, an advanced civilization existed on the Japanese archipelago more than 12,000 years ago, and its inhabitants held a cosmology consonant with modern physics: they took the fundamental constituents of matter to be infinitesimal particles called Ama, corresponding to subatomic particles, and understood all existence as arising from spiral rotational motion.

Narasaki’s background as a trained engineer gives the theory a distinctive gravity. Having worked in electrical engineering in Manchuria, he used the terminology and logic of physics in his decoding. Ama Shigen-ryo corresponds to quarks in particle physics; Mari denotes a spherically symmetric rotating body; Kamu equates to dark matter. That internal coherence is what attracts adherents who read the text not as occultism but as lost ancient science.

The problems are severe. No original manuscript exists. The existence of a person named Hira Toji cannot be confirmed. No independent third-party verification has been conducted. The Katakamuna script shows no genealogical relationship to any known ancient writing system. Scholars regard it as Narasaki’s own creation, with no archaeological corroboration at all.

Katakamuna endures all the same, and its following has grown since the 2000s. The physicist Kunio Yasue has discussed resonances between Katakamuna and quantum mechanics, and the text has resurfaced as a core document in spiritual movements linked to kotodama studies (the belief that words carry spiritual force) and natural farming. What Katakamuna satisfies is the wish for a Japanese intellectual tradition predating Western science. Where rapid Westernization after Meiji left the tacit assumption that science is something written in Western languages, Katakamuna works as a narrative that overturns the premise.

In the third century, a queen on the Japanese archipelago commanded the allegiance of more than thirty states. Her name was Himiko. She is described in approximately 2,000 characters in the Chinese historical text Wei Zhi Wo Ren Zhuan (the “Account of the Wa People” in the Records of Wei). She wielded kidō (shamanistic arts), never appeared before the public, was assisted in governance by her younger brother, and was guarded by a thousand female attendants. That description is the oldest portrait of a national leader on the Japanese archipelago. And this queen appears nowhere in the histories compiled in Japan itself. Not in the Kojiki. Not in the Nihon Shoki. The greatest mystery in Japanese history is not where Yamatai-koku was located. It is why Himiko was erased.

“Himiko” was most likely not a personal name but a title: Hi no Miko, Priestess of the Sun. Read that way, another figure comes into focus: Amaterasu Ōmikami. Both are female. Both are bound to the sun. Both governed through shamanistic power. The account of Himiko being assisted by her younger brother recalls the relationship between Amaterasu and Susanoo. If Himiko was the model for Amaterasu, the myth was not fiction but the memory of a real queen transmuted into sacred narrative.

A piece of astronomical evidence strengthens the hypothesis. NASA calculations confirm that in 248 CE, the year the Wei Zhi records Himiko’s death, a total solar eclipse was visible from the Japanese archipelago. Himiko’s death coincides with an eclipse, and the myth has Amaterasu retreating into the Ama-no-Iwato and plunging the world into darkness. If these are the same event described in different languages, the Ama-no-Iwato myth may be the memory of a solar eclipse in 248 CE and the death of Queen Himiko, encoded in the format of mythology.

The debate over the location of Yamatai-koku has run unresolved for over 150 years. The directional instructions in the Wei Zhi, followed literally, lead from the Daifang Commandery (near modern Seoul) south through Kyushu and into the Pacific Ocean, a fundamental contradiction. The discovery of a late-Yayoi vermilion-coated stone coffin at the Yoshinogari site in Saga Prefecture in 2023 revived the Kyushu hypothesis. The Hashihaka Kofun in Nara Prefecture, a keyhole-shaped burial mound approximately 280 meters long, has been cited as the strongest candidate for the Kinai hypothesis, its scale matching the Wei Zhi’s description of Himiko’s tomb.

The most persuasive hypothesis for why Himiko was expunged from the Kojiki and Nihon Shoki is political. Emperor Tenmu, who commissioned both texts, was constructing a patrilineal state system with the Emperor at its apex. The historical fact that a woman had governed through shamanistic power was fundamentally incompatible with that design. So she was erased—and that silence sits at the center of the founding story.

Japanese history has no more underrated figure than Emperor Tenmu. In a reign of merely fifteen years he established the title Tennō (Emperor), changed the nation’s name from Wa to Nihon, reorganized Ise Grand Shrine into the supreme national sanctuary, laid the framework of the ritsuryō state (the China-derived administrative law of the period), and commissioned the compilation of the Kojiki and Nihon Shoki. In short, he designed the operating system of the nation called Japan. Yet textbooks give him very little space. Perhaps the reason is that the deeper one digs into Tenmu’s identity, the more the official story of Japan’s founding begins to tremble.

First, an anomalous fact. The Nihon Shoki records the birth year of every Emperor except Tenmu, whose year is given as unknown. He did not allow his own birth year into the very text he commissioned. This can only be interpreted as deliberate concealment. Why would he need to hide it? The prevailing hypothesis is that Tenmu was in fact older than Emperor Tenji, who is recorded as his elder brother. Tenmu took four of Tenji’s daughters as consorts, a practice that even by ancient standards is extraordinary for a younger brother but perfectly natural for an elder.

What Tenmu accomplished reads like the work of a civilization rather than a single man. He established the title Tennō, where earlier rulers had been called Ōkimi, Great King. He changed the national name from Wa to Nihon. He reorganized Ise Grand Shrine as the nation’s supreme sacred site. He built the skeleton of a ritsuryō state through the Asuka Kiyomihara Code. He restructured the clan hierarchy through the Yakusa no Kabane, an eight-rank system of clan titles. And the crowning achievement: he collected the separate historical traditions held by individual clans and unified them into an authorized national history, the Kojiki and Nihon Shoki. Tradition holds that the Soga-era histories were burned or rewritten.

When the Takeuchi Documents (see “The Takeuchi Documents,” this chapter) claim that the imperial house rewrote history, the assertion is usually dismissed as outlandish conspiracy theory. But what Emperor Tenmu actually did was precisely that: he collected existing histories, burned them, and wrote a new narrative. The only difference is that the Takeuchi Documents have been judged forgeries, while the Nihon Shoki that Tenmu commissioned has been accepted as official history for 1,300 years. Anyone who says the word “Japan” is thinking inside an operating system Emperor Tenmu designed.

The Takeuchi Documents are not the only “forbidden text.” A second body of writings survives through an entirely different lineage: the Kuki Documents (Kukami Monjo). The Kuki (Kukami) family, a clan claiming Fujiwara descent that served as priests of Kumano Hongū Grand Shrine, guarded these documents in secrecy across generations. Where the Takeuchi Documents claim descent from Takenouchi no Sukune, the Kuki Documents come from a completely separate bloodline. Their contents are nonetheless very close. Why would two unrelated family lines preserve the same forbidden history?

The core claim of the Kuki Documents is this: ancient Japan possessed divine-age scripts (jindai moji) predating the introduction of Chinese characters, and the original texts were written in that script. Fujiwara no Fuhito is credited with translating them into Chinese characters. Prince Shōtoku, on this account, burned ancient records in the course of promoting Buddhism, deliberately erasing the history of the divine age. In the worldview of the Kuki Documents, Japan’s official history was rewritten at least twice, by Shōtoku and by Emperor Tenmu.

The claims grow larger still. According to the Kuki Documents, the descendants of Susanoo include Noah, Moses, and Jesus, while the lineage of Tsukuyomi-no-Mikoto encompasses Siddhartha (the Buddha). Every major religious founder in the world is a descendant of Japanese deities—a framework close to that of the Takeuchi Documents, though the specific genealogical correspondences differ.

One more coincidence is worth noting. The date the Kuki Documents assign to the era of Amaterasu and Susanoo corresponds to approximately 12,000 BCE. That date nearly overlaps with the Younger Dryas, a scientifically confirmed sudden cooling event that began roughly 12,900 years ago. The editors of the Kuki Documents could not have known modern climate science, and yet a date suggesting a civilizational reset lands on an independent scientific finding. It may be coincidence. For a coincidence, the fit is unusually tight.

Two families with no blood connection transmitted virtually the same forbidden history, each independently. The most probable explanation is that during the Edo period the kokugaku (national learning) movement spread among intellectuals the shared aspiration that Japan possessed its own script before Chinese characters, and that both families drew from the same cultural reservoir. Whether they dreamed the same dream or held the same memory remains unanswered.