The Kōri Debacle: How a Rumor About a Thirteen-Year-Old Boy Unmade a Hidden Church

In the autumn of 1657, a farmer named Hyōsaku, of the hamlet of Yatsugi in the Kōri district of the Ōmura domain, fell into conversation with his elder sister's husband — Ikejiri Rizaemon, a cabinetmaker of Sakaya-machi in Nagasaki — and, somewhere in the ordinary flow of family talk, probably over tea, probably with nothing more serious on his mind than the pleasure of passing on a piece of news, mentioned that he had heard of a remarkable boy. A boy of thirteen. A boy who, according to what people were saying, could perform miracles. A boy, it was whispered, whose powers exceeded those of Amakusa Shirō himself. Would his brother-in-law not come up to the rock cave at Kayase and hear the preaching for himself?

The farmer almost certainly did not realize what he had just done.

Rizaemon carried the story back to Nagasaki — an old woman in the hills, a holy image of the Virgin set out for veneration, a promise that a better age was coming — and reported it, through the elders of his ward, to the bugyōsho. Hyōsaku was arrested on the night of the eleventh day of the tenth month, in the middle of November. Kurokawa Masanao, the Nagasaki bugyō, notified the Ōmura clan; its metsuke — the censors of the domain — went out into the villages; and the machinery of the Tokugawa inquisition began to move. It did not ask whether the boy existed. It did not ask whether he had any actual connection to the dead teenage messiah of Shimabara, whose body had been decapitated nineteen years earlier and whose head had been mounted on a spike outside the walls of Nagasaki as a permanent warning. It did not wait for evidence, corroboration, or even the identification of a single suspect.

It did not ask his age, either, and no document of the affair supplies one. Thirteen is a modern inference, and probably a borrowed one: among the twenty prisoners the domain would eventually sentence to perpetual imprisonment were children of ten to thirteen, and the number appears to have traveled from them to him.

The parallel was enough. A Christian boy. Miraculous powers. In the Ōmura domain — neighbor to Shimabara, adjacent to Nagasaki, the very heartland of the Catholic Century. For the authorities of 1657, this was not a coincidence to be investigated. It was a prophecy to be crushed.

What followed was the first of the kuzure — the mass discoveries that would break one hidden Christian community after another over the next quarter-century — and the largest the shogunate had yet uncovered. By the time the arrests were complete, more than six hundred people — men, women, children, entire families spanning three generations — had been taken from their villages. Roughly four hundred and fifty were executed. Seventy-seven or seventy-eight died in prison. Ninety-nine were released after formally renouncing their faith. One eleven-year-old girl was sealed into the Ōmura prison and never released; she died there sixty-four years later, in 1722, having spent her entire adult life in a pestilential cell because of a community she had barely been old enough to join.

This is the story of the Kōri kuzure — the "Kōri Debacle" — an event that happened thirteen years after the last active Catholic priest in Japan was arrested, and eighteen years after the Portuguese had been expelled from the country under pain of death. It is the story of a surveillance state that believed it had won, and discovered, with horror, that it had not.

The Long Shadow of Hara Castle

Why the Shimabara Rebellion Made the Shogunate Fear Another Amakusa Shirō

To understand why a rumor about a boy would send an entire domain into panic, one has to understand what still haunted the men who governed it.

Nineteen years earlier, thirty-seven thousand Christian peasants in the Shimabara Peninsula and the Amakusa Islands had risen in rebellion behind a charismatic teenager named Amakusa Shirō — a boy whom the hidden Christian networks had identified with a prophecy allegedly left by an exiled missionary, promising that after twenty-five years a "remarkable youth" would appear in Japan, endowed with knowledge he had never studied, sent to deliver the faithful from their persecutors. They had fortified the abandoned fortress of Hara Castle, held out for months, and been massacred to the last man, woman, and child. The full story of the rebellion is told elsewhere on this site; what matters here is the memory it left.

For the shogunate, Shimabara was not merely a military trauma. It was theological. Christianity, if left undetected in the countryside, had produced — apparently from nothing, in a region the authorities believed they had already pacified — an insurrection capable of killing and wounding more than eight thousand of their own troops. The lesson the bakufu drew was not that peasants taxed at a hundred and twenty percent of their crop might eventually rebel, which was the obvious lesson. It was that the Christian faith had a subversive and military character that no ordinary policing could contain. What was needed was a total apparatus.

That apparatus was built. And Amakusa Shirō himself became, in the popular imagination, a figure of genuine supernatural menace — a magus, a sorcerer, a practitioner of "toad magic." Edo-period kabuki plays recast him as a Christian necromancer in plots to overthrow the shogunate, and the cultural memory of a miraculous Christian youth curdled into something closer to folk horror than to political history. Any rumor of another such figure — particularly in Kyūshū, particularly near Nagasaki, particularly in a domain bordering the scene of the original insurrection — functioned in the minds of the inquisitors the way a comet functioned in the minds of medieval astronomers. It was not information. It was an omen.

The boy of thirteen, whoever he was, had landed into a waiting apparatus built specifically to find him.

The Cage They Had Built

How Tokugawa Anti-Christian Surveillance Worked: Terauke, Gonin-gumi and Fumi-e

That apparatus is worth describing, because its sophistication is what makes the survival of the Kōri community so remarkable. By 1657, Japan possessed a system of religious surveillance without precedent in the early modern world — far more comprehensive, in its coverage and technical reach, than anything operating contemporaneously in Europe. The Roman and Spanish inquisitions dealt with heretics one at a time, relying on denunciations and confessions wrung from the individual. The Tokugawa system dealt with heresy as a problem of national cartography: every subject, every household, every temple, tracked continuously, inspected annually, cross-referenced against registries of suspect bloodlines.

At the base sat the shūmon-aratame and the terauke. Every subject was required by law to affiliate with a recognized Buddhist temple, which issued an annual certificate confirming the holder was not a Christian. The Buddhist clergy, whose relationship to the state had been fundamentally transformed by this arrangement, functioned simultaneously as spiritual authorities, census-takers, and informants. A missed registration was not an administrative oversight. It was suspicion.

Above this lay the gonin-gumi — the five-family group — the neighborhood unit into which every household was enrolled. The principle was collective guilt: if a hidden Christian was discovered, every family in the unit, along with their extended relatives, faced torture and execution. You watched your four closest households because your own life depended on their orthodoxy, and theirs depended on yours.

Above this, the fumi-e. The populations of the most suspect regions — Nagasaki and Ōmura above all — were required to trample annually on a copper or wooden image of Christ or the Virgin Mary, under the close observation of officials trained to watch for the slightest hesitation. Flushing. Heavy breathing. Sweat. A moment's pause before the foot came down. Any of these, the inspectors had been instructed, might betray a believer.

Above this, the bounty system — the public notice boards (kōsatsu) offering sums that represented life-changing wealth for a peasant. Silver for the denunciation of a European priest. Less for a brother or a formally returned apostate. Less again for a lay catechist. The figures everyone quotes — five hundred pieces of silver at the top of the scale — were not fixed until 1674, seventeen years after Kōri; the boards standing in 1657 promised less for the same betrayals.

And above this, at the top, the Office of the Inquisition, established in 1640 under Inoue Chikugo-no-kami Masashige — the shrewdest, most patient, and most genuinely dangerous anti-Christian administrator the Tokugawa produced. Inoue had built the Kirishitan-yashiki in Edo where captured priests lived out their lives in useful confinement, had taken Cristóvão Ferreira — broken in the Nagasaki pit in 1633 by other men — as his own assistant at the interrogations he conducted there a decade later, and had understood, earlier than anyone else in the bakufu, that killing Christians produced martyrs and that breaking them produced a Church with no walls.

By 1657, Inoue was old. He had seen, he believed, the back of the Christian problem. The last active missionary in Japan had been arrested more than a dozen years earlier. The Rubino group of 1643 — ten priests infiltrated back into Japan in a last, doomed attempt to resume the mission — had been broken and apostatized under his personal supervision. There was, as far as the Grand Inquisitor was aware, no remaining underground to find.

Then a farmer mentioned a boy.

What the Cage Had Missed

How the Kōri Christians Outwitted the Fumi-e, the Terauke and the Gonin-gumi

The community the metsuke began to unearth, as the first arrests widened in 1657 and 1658 into a full domain-wide sweep, was not a fragile remnant. It was not a handful of elderly converts clinging to scraps of a forgotten faith. It was a functioning, organized, multigenerational Christian society — embedded inside the Ōmura administrative system, performing all its required Buddhist observances, paying its temple fees, submitting its annual terauke certificates, trampling on the fumi-e when required to do so — and practicing its actual religion in secret, at night, in the houses of lay leaders who had inherited their roles from fathers and grandfathers.

The apparatus had failed. More precisely, the apparatus had been outwitted, in almost every one of its layers, by methods of such patient cunning that it took the inquisitors years to understand how deeply they had been deceived.

The gonin-gumi had been neutralized by the simple expedient of ensuring that entire village units consisted of fellow believers. The principle of collective guilt had been inverted: in Kōri, the five-family group did not expose the hidden Christian; it protected him. When the inspectors arrived, every household told the same story, produced the same certificates, performed the same denials. No one turned anyone in, because everyone was in.

The fumi-e had been defeated by a theological innovation of quiet brilliance. The Kōri Christians trampled on the image of Christ when required to do so — outwardly, promptly, without the hesitation the inspectors were watching for. Then, afterwards, in the privacy of their own homes, they performed prayers of contrition, begging God's forgiveness for the act they had been compelled to commit. The hidden faith had absorbed the sacrament of apostasy into its own liturgy. The trampling had become, in the hidden Christians' own interpretation, a kind of ritual confession — a reminder of weakness, a moment of penitence, a private communion with a God who was understood to see through the public act to the private heart.

The terauke had been defeated by the simple willingness to be a Buddhist in public and a Christian in private. The Kōri families attended the local temple. They participated in Buddhist festivals. They accepted Buddhist funerals. And they kept, in concealed places in their homes, the objects of their actual devotion.

Those objects, when the metsuke began to discover them in the house-to-house searches of 1657, revealed the extent to which the community had developed its own sacred material culture — a clandestine iconography built from the materials the surveillance state was not looking for. Statues of the Buddhist deity Kannon, the bodhisattva of mercy, were modified to represent the Virgin Mary and the Christ child, producing the objects the Japanese would later call Maria Kannon. An observant official, trained to recognize Christian iconography, could spot the difference. A bored inspector performing a routine search saw a Buddhist statue. Crosses were engraved on the backs of Buddhist statuettes, invisible unless the statuette was lifted and turned. Relics and images were concealed inside hollow pillars, inside pottery, inside incense boxes, inside medicinal salve containers. Corpses were buried, in defiance of the mandatory Buddhist funeral rite, with small wooden crosses — a defiance invisible until the authorities exhumed them, which, in Kōri, the authorities eventually did.

This was a church without priests, without sacraments beyond baptism, without contact with Rome, without any of the material apparatus of Christianity as it existed anywhere else in the world. It had replaced the Mass with communal prayer. It had replaced the priest with the lay elder. It had replaced the illegal crucifix with the modified Kannon. It had survived for more than a generation — some of the prayers the Kōri Christians were still reciting had been taught to their grandparents by European missionaries whom they themselves had never seen. And it had done so, not in some remote fishing village on an inaccessible coast, but inside the administrative boundaries of one of the most heavily surveilled domains in Japan, a stone's throw from Nagasaki.

The inquisitors had built a cage. The cage had worked, in the sense that it had kept the faith out of sight. It had not worked, in the sense that the faith was still there.

The Scale of What Was Found

How Many Christians Were Arrested and Executed in the Kōri Kuzure

The numbers, when the authorities tallied them, were staggering — staggering enough that the Ōmura clan officials almost immediately began burning the records.

More than six hundred people were arrested. Some sources give a figure as high as six hundred and sixty-five, though the actual total was almost certainly higher, since significant numbers of incriminated individuals vanished from the documentary record before their names could be formally registered. Approximately four hundred and eleven to four hundred and sixty-eight were executed. Another seventy-seven or seventy-eight died in custody. Ninety-nine were released, but only after they had formally sworn an oath of apostasy — the korobi shōmon, the ritual renunciation that called down divine damnation on any signatory who ever returned to the faith.

Executions were conducted household by household. The authorities made no concessions to age or gender. Entire families, spanning three or four generations, were beheaded together at a single site — grandfathers, fathers, mothers, sons, daughters-in-law, grandchildren. The source documents preserve the names of some of them. The family of Jirozaemon — his wife, their son Jiroemon and his wife Sen, along with their grandson Jirosuke and his wife Senzuru — were all beheaded in a single sequence. The family was, in a very precise bureaucratic sense, terminated.

The conditions for those who did not die quickly — the hundreds who remained in the Ōmura jail awaiting execution, interrogation, or the slower death of starvation and disease — were designed to break the spirit of the faith as thoroughly as they broke the body. Contemporary accounts describe the prison as a single long hovel, roughly seventy-two feet by thirty, with a ceiling so low an adult could not stand fully upright. Approximately one hundred and fifty people were confined inside it at a time, packed so tightly they slept leaning against one another. Their bodies, according to accounts that survived the Ōmura clan's later destruction of records, were entirely covered in lice. They were fed a single mouthful of food and a porringer of water morning and evening. Many died within forty to fifty days from pure exhaustion. Some, deprived of water in the summer heat, went mad from thirst. The dead could not be removed without explicit written permission from the governor, and permission was difficult to obtain; corpses were therefore left in the cell for seven or eight days in the summer heat, producing a compounding crisis of disease, ulceration, and mortification of the extremities among those whose limbs pressed against the rotting flesh of their neighbors.

And then there was the girl.

She was eleven years old when she was arrested. The sources do not preserve her name. She was among the youngest of the Kōri captives, and because of her age — or because of some calculation on the part of the interrogators that escapes the historical record — she was not executed. She was sentenced to lifelong imprisonment and sealed into the Ōmura jail. She was never released. She remained in the prison for the rest of her life. She died there in 1722 — sixty-four years after her arrest, half a century after the last surviving adult member of the community she had been born into had died, in a cell that by then contained no one who had been with her at the beginning, no one who remembered the Kōri villages, no one who could have told her what had happened outside.

She had been arrested, in 1657, in the reign of the fourth Tokugawa shogun, Ietsuna. She died, in 1722, in the reign of the eighth Tokugawa shogun, Yoshimune. Four shoguns came and went while she remained in the Ōmura cell. The Qing dynasty completed its conquest of Ming loyalist resistance. Louis XIV died, after seventy-two years on the throne of France. The Newtonian revolution took place. The shogunate issued approximately seventy thousand administrative edicts in the intervening decades. None of them concerned her. She was, for sixty-four years, a forgotten piece of evidence in a case the authorities believed they had already closed.

Her death, in 1722, is the last datable event of the Kōri kuzure. It is, by any reasonable accounting, the last death of the terror that Shimabara set loose — a war that ended in 1638 and went on killing, in a cell in Ōmura, for another eighty-four years.

The Cover-Up

Why Ōmura Hid the Scale of the Kōri Discovery, and Inoue Masashige's Resignation in 1658

What the Ōmura clan did next, as the scale of the discovery became apparent through the autumn and winter of 1657, was to reach for the only tool they had left: the match.

Documents were gathered from the clan's administrative records, from the metsuke reports, from the interrogation transcripts, from the household registers that traced which families had been implicated in which ways. They were piled and burned. The clan officials were not destroying evidence of Christian heresy — the heretics were already in prison or already dead. They were destroying evidence of their own failure.

The logic was straightforward. The Ōmura domain had been, for decades, under explicit shogunal instruction to maintain the strictest anti-Christian surveillance in the country. It was next to Nagasaki. It was adjacent to Shimabara. It had been, in the late sixteenth century, a Christian daimyō's domain under Ōmura Sumitada, the first Japanese lord to convert and the man who had ceded Nagasaki to the Jesuits in 1580. That entire legacy made the Ōmura clan of 1657 particularly vulnerable. If the scale of the hidden community in Kōri became fully known in Edo — if the bakufu realized that six hundred, possibly seven hundred, possibly more Christians had been practicing their faith in plain sight for decades within the clan's administrative jurisdiction — the clan itself might face severe disciplinary action. Daimyō had been stripped of their domains for less. Some had been ordered to commit seppuku for less.

Better, then, to burn. Better to report the arrests in figures that, while shocking, could be framed as a successful demonstration of the clan's surveillance capacity rather than as an exposure of its decades-long incompetence. Better to present the discovery as proof of the system working rather than as proof of the system having failed. Better, in short, to destroy the paperwork.

This is why the historical record of the Kōri kuzure is as patchy as it is. The official figures are likely undercounts. The list of the arrested is likely incomplete. The names of perhaps hundreds of those involved are permanently lost — not because they were not written down at the time, but because what was written down was deliberately burned by men whose political survival depended on the numbers being smaller than they were.

What the Ōmura clan could not do, however, was hide the event itself. The arrests had been too numerous, the executions too public, the machinery of the inquisition too centralized for the news to be contained. Edo knew. Inoue Masashige knew. And Inoue, who had believed the Christian problem was essentially solved, understood immediately what the discovery meant.

It meant his twenty-year apparatus had failed in its core mission. It meant the faith had survived underneath the surveillance he had designed. It meant that if Kōri existed, other Kōris might exist — in the Gotō Islands, in the Sotome coast villages, in the hills of northern Kyūshū. It meant that the old inquisitor had, in his final years, presided over a failure that history would remember.

He resigned in 1658. He was succeeded by officials who inherited his apparatus but had not built it. He had been the chief architect of the Tokugawa religious surveillance state for nearly two decades, and the Kōri kuzure was the catastrophe that ended his career.

The Ratchet Forward

The Kirishitan Ruizoku Chō and the Tracking of Christian Bloodlines to the Seventh Generation

The bakufu's response to the Kōri discovery was not to question whether the apparatus made sense. It was to extend it.

This is the pattern of surveillance states everywhere. When the system fails, the failure is taken as evidence that the system was insufficiently comprehensive, not that its comprehensiveness was the problem. The Tokugawa response to the revelation that hundreds of Christians had been living undetected under the most intensive religious policing in the world was to police more intensively.

New inquisition officers were appointed, both within the affected domains and nationally. The police force was expanded. The fumi-e was enforced with a frequency and stringency that, in the regions around Nagasaki and Ōmura, reached the point of ritual annual performance by the entire adult population. Inspectors were retrained to watch for the subtler tells that the Kōri Christians had apparently evaded for a generation — not merely the obvious hesitation, but the particular configuration of the foot as it descended.

But the most consequential innovation — the one that represented a genuine qualitative shift — was the Kirishitan ruizoku chō, the "registers of the family groups of Christians." These were genealogical surveillance registers, maintained in every domain, that tracked the bloodlines of any discovered Christian through their descendants: up to seven generations for men, four generations for women. Marriages, births, deaths, religious affiliations, changes of residence — all recorded. A child born to parents one of whom had a great-great-grandfather listed in the registers was born, in a bureaucratic sense, under suspicion. That suspicion was inherited. It did not diminish with time.

This was not reactive persecution. It was preemptive, genealogical, generational surveillance of a kind that had no earlier parallel in Japanese or European practice. The implicit theory behind it was that Christianity was not merely a belief one might adopt or abandon, but a contaminant that could be passed through family lines — a hereditary heresy, transmitted not by teaching but by blood. The theory was, of course, wrong. But the apparatus built on it was terrifyingly effective. It would remain in force for over two centuries, dismantled only in 1873, when the Meiji government, facing diplomatic pressure from Western powers whose gunboats had just reopened the country, finally lifted the ban on Christianity.

The Kirishitan ruizoku chō is, in a sense, the ultimate monument to the Kōri kuzure. The faith that had been hidden by the villagers of Kōri could not be hidden again, because the faith itself had been conceptually rewritten by the shogunate as something biological. Whatever the Kōri Christians had believed, they were no longer the kind of people their descendants could be — they were, in the eyes of the new registers, a contaminated bloodline to be watched for a hundred and fifty years.

And yet — despite all this — the hidden Christians survived. They survived through the eighteenth century. They survived through the nineteenth. When French priests arriving in Nagasaki after the forced reopening of Japan built the Ōura Church in 1865, a group of Japanese peasants from the village of Urakami approached them and revealed, in a moment that astonished the Catholic world, that the faith had never died. It had merely gone deeper than even the Kōri authorities had imagined, into villages that had managed the one feat the Kōri Christians had not: they had kept their rumors inside.

What the Debacle Meant

Why the Kōri Kuzure Matters in the History of Japan's Hidden Christians

The Kōri kuzure does not appear on most timelines of the Nanban period. It happens after the period's conventional end date. It does not involve Portuguese ships or Jesuit missionaries or the kind of dramatic named figures who populate the earlier chapters of the encounter. Its characters are almost entirely anonymous — a farmer whose name is not recorded, a thirteen-year-old boy who may not have existed, an eleven-year-old girl who died in a prison cell in 1722.

But it is one of the most important events of the persecution, and not only because it was the first of the kuzure, the chain of mass discoveries that would run on through Bungo and the Nōbi plain for another quarter-century. It is important because it demonstrates, with unusual clarity, the nature of what the Nanban encounter had produced. A century of Portuguese contact had deposited, in the soil of western Kyūshū, a population whose loyalty to a foreign religion was strong enough, and whose capacity for clandestine organization was sophisticated enough, to survive twenty years of the most comprehensive religious surveillance apparatus the early modern world had ever assembled — and then to be discovered only by accident, only because the authorities happened to be listening for exactly that kind of story.

It demonstrates, too, the limits of the Tokugawa achievement. The machine had worked, mostly. It had not worked completely. Every subsequent intensification of the apparatus — every new register, every more frequent fumi-e, every genealogical chart traced out to the seventh generation — was an admission, implicit but unmistakable, that the faith was still out there, somewhere, in communities the state had not yet found.

Inoue Masashige retired in 1658. The Ōmura clan burned its records. The girl in the cell entered her third year of imprisonment. And in villages along the Sotome coast, on the Gotō Islands, and in the hills above Nagasaki, other communities of hidden Christians took note of what had happened to Kōri, adjusted their practices, hid their Maria Kannon statues a little deeper, and went on.

They would not be found for another two hundred years.

Sources & Further Reading

Boxer, C. R. The Christian Century in Japan, 1549–1650. University of California Press, 1951. The foundational English-language study of Christianity in Japan. Boxer's treatment of the post-Shimabara period is essential for understanding the context of the Kōri arrests and remains the standard general reference.

Cieslik, Hubert. "The Case of Christovão Ferreira." Monumenta Nipponica, Vol. 29, No. 1 (1974). Indispensable for understanding the role of Inoue Chikugo-no-kami Masashige, whose career as Grand Inquisitor spanned the entire period from Ferreira's apostasy in 1633 to his own resignation in the wake of the Kōri discovery.

Elison, George. Deus Destroyed: The Image of Christianity in Early Modern Japan. Harvard University Press, 1973. The most detailed intellectual history of the anti-Christian campaign, with careful attention to the ideological and bureaucratic machinery that the Kōri community managed to evade for a generation.

Gonoi, Takashi. Nihon Kirishitan-shi no Kenkyū [Studies in the History of Japanese Christianity]. Yoshikawa Kōbunkan, 2002. A collection of studies on the mission's first century — Xavier's landfall, the opening of Bungo, the urban congregations, Ōtomo Sōrin's conversion, the persecutions under Hideyoshi and Ieyasu — closing with an essay on the role of lay believers in the Bungo church. It stops well short of 1657, but the lay organization it describes is what the Kōri villagers were still running, without priests, half a century later.

Higashibaba, Ikuo. Christianity in Early Modern Japan: Kirishitan Belief and Practice. Brill, 2001. Particularly valuable for its analysis of how hidden Christian communities in Kyūshū developed the clandestine sacramental practices — the modified Kannon statues, the secret post-fumi-e contrition prayers — that the Kōri community had refined over decades.

Jennes, Joseph. A History of the Catholic Church in Japan: From Its Beginnings to the Early Meiji Era (1549–1873). Oriens Institute for Religious Research, 1973. Offers a detailed narrative of the post-Shimabara persecutions and includes discussion of the specific events at Kōri drawing on both Japanese and European sources.

Kataoka, Yakichi. Nihon Kirishitan Junkyōshi [History of Christian Martyrdom in Japan]. Jiji Tsūshinsha, 1979. The standard Japanese-language martyrology, with chapter-length treatment of the Ōmura persecutions including the fate of individual families and the eleven-year-old girl who died in prison in 1722.

Miyazaki, Kentarō. "The Kakure Kirishitan Tradition." In Handbook of Christianity in Japan, edited by Mark R. Mullins. Brill, 2003. An essential overview of the underground Christian communities, with particular attention to their organizational structures, ritual innovations, and strategies of concealment.

Nosco, Peter. "The Experiences of Christians During the Underground Years and Thereafter." Japanese Journal of Religious Studies, Vol. 34, No. 1 (2007): 85–97. A careful analysis of how hidden Christian communities structured their practices to survive the Tokugawa surveillance apparatus — including the theological innovations that allowed them to rationalize the performance of the fumi-e.

Ōhashi, Yukihiro. Kirishitan Minshūshi no Kenkyū [Studies in the Popular History of Japanese Christianity]. Tōkyōdō Shuppan, 2001. The leading modern Japanese study of the popular and village-level dimensions of Christianity in Japan, with detailed treatment of the Kōri community's social organization and the mechanics of its discovery.

Paramore, Kiri. Ideology and Christianity in Japan. Routledge, 2009. An analysis of the ideological foundations of the anti-Christian campaign, with particular attention to how the genealogical registers (Kirishitan ruizoku chō) instituted after Kōri represented a conceptual shift in the shogunate's understanding of Christianity as a biological contaminant.

Shimizu, Hirokazu, ed. Kirishitan Kankei Hōsei Shiryō [Historical Materials on the Legal Regulation of Christianity]. Sōkyū Shuppan, 2002. The primary collection of legal and administrative documents related to the anti-Christian campaign, including materials on the surveillance systems that the Kōri community evaded.

Turnbull, Stephen. The Kakure Kirishitan of Japan: A Study of Their Development, Beliefs, and Rituals to the Present Day. Japan Library, 1998. The standard English-language study of the Hidden Christians, with detailed treatment of the specific communities in the Ōmura and Nagasaki regions, their material culture (including the Maria Kannon statues), and the long aftermath of the Kōri arrests.

Whelan, Christal. The Beginning of Heaven and Earth: The Sacred Book of Japan's Hidden Christians. University of Hawai'i Press, 1996. A study of the Tenchi Hajimari no Koto, the hidden Christians' own syncretic scripture, illuminating the kind of clandestine theological transmission that sustained communities like Kōri across generations without priests.