A Witness from Rome: Thomas Araki and Japan’s Christian Persecution, 1619–1640s

A Japanese Book for the Roman College

The 1599 Nagasaki-Printed Book Thomas Araki Gave the Roman College

Thomas Araki gave the Roman College a book about the salvation of sinners.

It was a Japanese version of Luis de Granada’s devotional guide, known in the mission’s Portuguese as the Guia do Pecador, printed at Nagasaki in 1599. On the flyleaf he wrote a dedication in Latin, thanking the college where he had studied rhetoric, philosophy and theology. He signed himself Petrus Antonius Arachius, Iaponensis presbyter, a Japanese priest.

One object held several parts of the Catholic world at once. A Spanish work had been translated into Japanese, printed in a Japanese port, carried to Europe and handed to a Jesuit institution in Rome, where the Latin on the flyleaf explained the transaction to readers who could not read a word of the book itself. He asked them to value the intention behind the gift rather than the thing given, which he described as worth nothing, and he made the request in a single Latin period of such ambitious construction that the poverty it pleaded was contradicted by the sentence pleading it.

That was the point. The dedication is a display of the education it thanks.

Akihiko Watanabe, who inspected the original at Sophia University in 2015, read the wording as strong evidence that Araki had carried the volume, or at least the sheets printed at Nagasaki, from Japan to Italy himself. The book had turned up in 1996 in the Gesù in Rome and passed afterwards to Sophia’s Kirishitan Bunko in Tokyo. The inference rests on the phrasing, not on a shipping record, and Watanabe was endorsing a reading first argued by Hiroshi Harada against other scholars who had supposed Araki merely found the volume in Rome. What is not an inference is the gift and the studies. Iaponensis presbyter required no interpreter and no European to speak for him.

Within a decade the same education made him useful to the people dismantling the Japanese church. Arrested at Ōmura in 1619, Araki renounced Christianity and went to work for the authorities against missionaries and the households that hid them. He could recognize clerical knowledge when he heard it, and he could move between languages. The mission had trained men to explain Christianity in Japan. The magistrates found they could use the same men to identify people practicing it in secret.

That service has supplied nearly all of his reputation. He entered the histories as a renegade, an informer, one of the korobi bateren, the fallen priests: a term that combines the fact of a renunciation with an account of what a priest ought to have done instead. It says nothing about how he lived for the next quarter century, which particular accusations he helped prove, or whether his compliance ever again matched his convictions.

The flyleaf preserves the earlier self-description. An ordained Japanese man claiming his place inside the learned culture of the church, in the church’s own language, with a gift. Nothing in it announced what came next. Reading it as the first sign of a future villain’s vanity, or of a future penitent’s sincerity, gives the document knowledge its author did not have.

The Word That Proves One Thing

What the Word Presbyter Proves About Thomas Araki's Ordination Around 1611

There is no birth date.

An exact year and a secure account of Araki’s family are simply absent from the record, and the descriptions of him as a young man in Rome will not carry the weight of a calculation backward. His education is the firmer place to begin, because it left documents.

He went to Rome in the early seventeenth century, and he went as a beneficiary of a policy. Bishop Luís de Cerqueira had spent his episcopate arguing that the church in Japan needed Japanese priests of its own, and Yoshiki Hazama connects Araki’s journey to the bishop’s sponsorship. Latin was the instrument that made such a career possible and also the gate that rationed it: a language that could carry a Japanese cleric’s words to superiors abroad, and that controlled access to the parts of the curriculum leading anywhere.

In Rome he became associated with Cardinal Robert Bellarmine, one of the most prominent theologians in the Catholic world. Watanabe places his ordination around 1611; other accounts give 1612. The tradition that the two men recited the Divine Office together is the kind of detail that survives because it shows how near the center of Roman religious life a Japanese student had come. It does not establish a papal audience. Nor does an education, however good, make a man demonstrably the most learned Japanese priest of his generation, a claim that has attached itself to him without evidence.

His clerical affiliation wants the same care, and here the scholarship divides. Kōichirō Takase’s 1978 study identifies him flatly as a secular priest, meaning an ordained cleric who belonged to no religious order and answered to a bishop, not the modern sense of the word. Older accounts, repeated in scholarship as recent as James Harry Morris’s 2018 thesis, describe instead an ex-Jesuit expelled on moral charges. Attending a Jesuit college does not settle it. Education by an order and membership in one were different relationships, and the mission ran on the first.

Nor does his own signature help. Presbyter establishes the priesthood he claimed. It says nothing whatever about whether he had joined the Society of Jesus and left it. A complete institutional history would have to be built out of personnel records and the evidence behind Takase’s reconstruction, and repeating the allegation of misconduct as the explanation for everything that followed substitutes a character judgment for that work. It is also the most convenient explanation available, since it accounts for the apostasy before the apostasy happens.

A Latin letter dated 3 January 1615 places him at Macao. He returned to Japan around that time, after the general expulsion of missionaries in 1614 had changed the terms on which any priest could work there. He had spent a decade acquiring an education designed for a church with buildings, parishes and superiors. He came home to one that was learning to operate without them.

Ōmura, 1619

What Happened When Thomas Araki Was Arrested at Ōmura in 1619

Araki was arrested at Ōmura in 1619. He apostatized, and he became an informant for the Tokugawa authorities.

Those three facts are firmer than anything about how he arrived at them. The surviving accounts give no reliable scene inside the prison: no named interrogator, no sequence of questions, no documented account of what was done to him. The pit that would break Cristóvão Ferreira was fourteen years in the future.

The gap has produced incompatible descriptions, and the incompatibility is partly an illusion. Some histories called the renunciation voluntary. Others attributed it to fear of torture, or to coercion outright. These need not describe different circumstances at all. A prisoner may renounce his faith before anyone lays a hand on him and still be acting under a credible threat of imprisonment or death, and the absence of evidence that a particular torture was applied establishes nothing about the absence of pressure.

The distinction mattered enormously to the institutions doing the recording. A missionary history needed to contrast his conduct with that of prisoners who refused, because the contrast was the point of writing it down. An official record needed to register a satisfactory act of submission and had no reason to undertake a description of his conscience. Neither document was composed to answer the questions a biographer would later ask of it, and it is worth remembering whose account a characterization of Araki’s motives comes from before repeating it as his motive.

What followed the renunciation reached well past his own survival. Knowledge of hidden missionaries and the households that fed them is actionable information. A priest working underground depended absolutely on people willing to provide lodging, supplies and a channel for messages, and once those relationships were named, the repression could reach the lay community that made a clandestine ministry possible at all. Arresting a cleric and exposing his hosts were the same operation.

Morris places Araki’s defection inside the wider intensification of persecution at Nagasaki in 1619, alongside the Murayama Tōan affair and information supplied by other former Christians. Between them the affair and the informants demonstrated to the bakufu that missionaries were still in the country, and the persecution was tightened accordingly. No single-informer account of the crackdown survives contact with the record. Araki contributed knowledge to an effort already running.

That limits what can be said about his victims, in the direction of saying less. Executions rose after his apostasy. Which deaths followed from his testimony is not recoverable, and the temptation to attach a national total to one man makes his guilt easier to summarize and impossible to substantiate.

One prosecution shows exactly what his cooperation could do.

Two Merchants Who Were Priests

How Thomas Araki Helped Identify Two Disguised Priests Burned at Nagasaki in 1622

In 1620 two Spanish merchants sailed for Japan aboard a Japanese ship commanded by Hirayama Jōchin, also known as Joachim Díaz. One of them was Pedro de Zúñiga, an Augustinian. The other was Luis Flores, a Dominican.

They were taken at sea, and not by the Japanese. English and Dutch vessels made the capture and delivered the prisoners into a dispute that ran for the better part of two years, because everything depended on establishing what sort of men they were.

The distinction between merchant and missionary carried the whole case. Foreign trade into Japan was still permitted. Missionary entry was not. So the captors needed to prove the prisoners were priests, and their Protestant commercial rivals had every reason to want them proved: an accusation that failed would leave the accusers exposed, and an accusation that succeeded would demonstrate to the Nagasaki magistracy that the Iberians smuggled clergy in the holds of trading ships. It was an argument about souls conducted largely by men with freight to move.

Hasegawa Gonroku, the Nagasaki magistrate, did not simply take the first account offered to him. There were hearings, negotiations and delays. The Europeans pressed; the Japanese authorities kept the power to decide, and used it slowly. The resulting alignment ran straight across any tidy division between European visitors and Japanese persecutors.

Araki assisted the effort to identify the prisoners as priests. That was precisely the work his training fitted him for. A man who had studied rhetoric, philosophy and theology at the Roman College could hear the difference between a merchant and a cleric in a way no trading factor could, and a Roman-educated Japanese priest who had himself recanted made an unusually difficult witness to dismiss. His former standing inside the church was the thing that made him useful outside it.

It should not be flattened into a scene in which Araki named two men and a sentence followed. Morris’s account of the affair also describes the Dutch torturing the prisoners, and the eventual confession that came out of it. The Spanish record of the prosecution has Zúñiga himself dropping the pretense and explaining why he had maintained it: he had concealed his identity so as to do no harm to the men of the ship, who knew nothing of who he was. Araki took part in a prosecution whose outcome depended on several parties. He did not hold the magistrate’s authority, and he did not hold the Dutchmen’s rope.

The men of the ship knew nothing, and it made no difference to them at all.

Zúñiga, Flores and the captain were burned at Nagasaki on 19 August 1622. Twelve of the crew were beheaded. The religious orders preserved the biographies of their two martyrs; the Japanese sailors who had given them passage died on the same day and are counted, when they are counted, as companions.

These executions were not the Great Martyrdom at Nishizaka, which came three weeks later, on 10 September. Both belong to the persecution of 1622 and the two are regularly welded into one event, which obscures both the chronology and the responsibility. Araki’s part in identifying Zúñiga and Flores is a specific act, on a specific case, with a specific outcome. It does not make him the author of every arrest that ended on Nishizaka hill.

The Working Life of a Fallen Priest

The 1632 Latin Letter That Shows What Thomas Araki Did After Apostatizing

On 16 October 1632 Araki wrote a letter in Latin to a Dutch merchant.

It survives, and Watanabe, surveying the Japanese-authored Latin of the period, puts it at the low end of everything that has come down: grammatically, he calls it fairly atrocious. It is also the latest such document to survive. The hand that had written the dedication in the Roman College was still doing business in Latin, and doing it badly.

Renunciation had taken nothing away from him except the right to use what he knew on behalf of the church. The languages stayed. So did the working familiarity with how missionaries thought, argued and concealed themselves. What changed was who benefited, and the record of the next two decades is a record of employment: interpretation and questioning under Hasegawa Gonroku, and, as Watanabe notes, commercial activity in his own name in Nagasaki. Araki’s life after 1619 was not exhausted by a single dramatic defection. It ran another quarter of a century.

Interpreting, in a port magistracy, was a function of government rather than a service to it. People arrived describing themselves in several languages and belonging to overlapping legal and religious jurisdictions, and the interpreter decided, in practice, whether a foreigner’s explanation was intelligible, whether a claimed occupation was credible, and whether today’s statement could be set against one taken last year. Knowledge acquired inside the mission was useful at every one of those stages.

Watanabe also found evidence of Araki using Latin during the interrogation of Dominican missionaries in 1637, which puts his ecclesiastical education still in service eighteen years after he abandoned the church that gave it to him.

Poor Latin in 1632 is not a diagnosis. It does not establish intellectual decline or spiritual collapse; it may reflect circumstances no longer recoverable. What it does do is complicate the portrait in which Araki’s significance depended on unvarying brilliance. A surviving document can be good evidence of contact without being good Latin.

Older accounts place him among Catholic Portuguese and Protestant Dutch merchants alike, a man who kept relations across exactly the divisions that persecution was sharpening. Commerce is indifferent to that sort of thing. A trading relationship certified no agreement in religion, and a former priest’s usefulness could survive the contempt attached to his apostasy, because the contempt was not what anybody was buying.

The title “inquisitor,” which has attached itself to him, is the point where the record stops supporting the reputation. His expertise fed investigations. A word implying that he directed the Tokugawa apparatus gives him a defined authority the evidence does not show. Magistrates issued judgments, local officials enforced them, and informants supplied knowledge, which is the least glamorous and most consequential position of the three.

His case demonstrates the flaw in the mission’s own strategy. The church had wanted Japanese clergy in order to reduce its dependence on foreign personnel. The training worked. It produced a Japanese priest whose skills did not evaporate when his faith did, and the authorities did not have to reproduce a decade of Roman schooling in order to benefit from it. They only had to arrest the man who had it.

An Oath Intended to Outlast Its Signer’s Fear

What Were the Korobi Shōmon, the Written Oaths Linked to Thomas Araki?

A man who had said the words could always unsay them.

That was the administrative problem left behind by every successful interrogation. A spoken recantation secured a release and secured nothing else. Somebody who submitted under immediate pressure might return to Christian practice the moment the pressure lifted, particularly if a hidden priest could still be reached, and so the suppression had to find ways of making a temporary act of compliance durable and verifiable.

Written apostasy oaths, the korobi shōmon, were one of them. They put the renunciation on record. They could require the signer to name a Buddhist affiliation and to disavow further Christian practice, and some forms invoked punishment in Christian terms, calling down the penalties of a religion the signer was in the act of abandoning. The sacred names he had been taught to fear were turned into witnesses against his own return.

The involvement of former priests is the usual explanation for that precision, and Araki appears in it. He, Cristóvão Ferreira and Miguel Gotō stand together in the tradition about the oaths: three men who had been ordained, who had fallen, and who could tell an official exactly what a Catholic believer regarded as binding, as sinful, and as still open to absolution. One endorsement attributed to them states the matter in the vocabulary of the confessional. A true revocation of apostasy, it says, is quite impossible without the mediation of a padre. A secret revocation is not possible.

The trouble is that origin, revision and endorsement are three different kinds of involvement, and the tradition collapses them. Morris, following earlier scholarship, notes that apostasy oaths predated Ferreira’s recantation altogether, and that their form drew on an existing Japanese practice of written religious pledges older than the mission itself. The claim that three fallen priests invented the procedure does not survive the dating. What is supportable is narrower and still damaging: former clerics became associated with applying it and explaining it.

The other claim in the oath deserves the same treatment. That apostasy was now spiritually irreversible was an argument made under duress, by an authority with no standing to make it. A magistrate’s document could not settle Catholic teaching on repentance and forgiveness, and no oath could establish for all future time what its signer believed. Hunting the clergy while demanding public acts of renunciation did make reconciliation harder, since it removed the priests through whom a reconciliation was supposed to run. That is a fact about the supply of confessors. It is not a fact about the state of anybody’s soul.

Alongside the written statement went the visible one, the trampling of a sacred image associated with the fumi-e, and between them the officials had two things they could witness, date and file.

The distinction bears hard on Araki, because his own last years turn on it. The question the sources cannot agree about is whether a registered apostate could profess the faith again. A system built to fix religious identity in writing had a life on its hands that refused to stay in one category.

The Witness and the Empire Behind Him

Why Japan Severed Relations with Spain in 1624, and Thomas Araki's Alleged Role

Somewhere in Madrid, according to a story that outlived everyone in it, Thomas Araki heard men discussing the conquest of Japan.

He reported what he had heard to the shogunal authorities, and the older historical literature gave him a second career on the strength of it: not merely an informer against priests but a witness to Iberian intentions, the man who told Edo what the Catholic monarchies were really planning. His European years made him the ideal bearer of the allegation. He could claim to know the institution and the countries he was warning against, from the inside, in their own languages.

The story fit a suspicion the Japanese authorities already held, that conversion was the advance work of political subjection, and it did not have to manufacture that suspicion in order to feed it. The missionaries did operate through networks tied to Iberian shipping and Iberian patronage, and their Protestant rivals were happy to explain the connection to anyone in government who would listen. A Japanese priest educated in Rome offered a confirmation of a different quality from an English or Dutch trader defending his own market share.

It still cannot carry the policy consequences that have been loaded onto it. The contemporary testimony underneath the Madrid episode has not been established in the sources checked here, and even supposing Araki did repeat such an allegation, what that establishes is what he told an audience. It does not establish an approved Spanish invasion plan.

A report about a report is not an order to an army.

The restrictions that followed had their own long histories, driven by their own quarrels. Relations with Spain were severed in 1624. The Portuguese were confined to the artificial island of Dejima in 1636 and excluded from Japan altogether in 1639. Each of those measures emerged from years of argument over religion, shipping, smuggling and the limits of shogunal authority, and none of them can be read backward as the harvest of a single item of intelligence delivered by a single man.

European experience really was the source of his value. It gave him standing as a witness to institutions and countries that most Japanese officials knew only through the foreigners standing in front of them, and that standing is exactly what made the accuracy of each report consequential. Personal knowledge of Rome was not personal knowledge of every policy attributed to the Iberian monarchies, and it established nothing at all about the war plans of the Spanish crown.

His actual cooperation never needed the enlargement. Helping to identify concealed priests and interpreting for a magistracy were sufficient to determine what happened to other people, and they remain sufficient after the claims to authorship of a national policy have been set aside.

The Final Profession

Did Thomas Araki Die in 1646 or 1649 as a Loyal Apostate or a Returned Christian?

Araki died in 1646. Or in 1649. Watanabe kept both years, and so must anyone else.

The harder question is not the year but the room. He either died in the government’s service, still the useful apostate, or he died having reaffirmed Christianity and been imprisoned for it, and the two versions cannot both be true.

The suspicion attaching to the second is obvious. A story in which a dying apostate returns to the faith performs a service for the institution that tells it: it recovers a man whose defection had been a public humiliation, and the mission had reason to want him recovered. The most elaborate versions place Araki among Christians under punishment, declaring his renewed faith and demanding to share their fate, which is a scene rather than a record. The Society produced exactly this ending for Cristóvão Ferreira within a few years of his death, and by every modern account Ferreira never recanted.

But the alternative account is not a deathbed miracle. In the reading Yoshiki Hazama sets out, Araki reaffirmed his faith in old age and died of illness in confinement, and even Hazama gives it in the passive, as something transmitted rather than witnessed. Hazama’s interest is in what such an end would mean. Araki cannot be a martyr by the church’s own criteria, having once apostatized, and no execution ever came. What Hazama argues is that a man who professed the faith again, knowing that the profession meant a cell, had accepted everything a martyr accepts except the axe. The bakufu by then had learned not to supply one.

That is an argument about significance. It is not evidence. The exact place and date of the reported profession remain unresolved, no last words can safely be supplied to a scene nobody recorded, and the fact that officials had good reasons to avoid creating another martyr does not demonstrate that they applied the policy in this particular case. An explanation of why an event could have happened is not evidence that it did.

Either ending leaves the middle of his life exactly where it was. If he returned to the church, the return did not withdraw his testimony in the Zúñiga and Flores prosecution or undo a quarter century of work for the magistracy. If he did not return, that does not make every allegation later attached to him true. Repentance and responsibility are separate questions, and the competing stories of his death were built to answer both at once, which is how you can tell they were built.

What survives in his own hand answers neither. The dedication in the Roman College records a course of study, a priesthood and a gift; it was found with the 1599 book in Rome in 1996 and now sits in the Kirishitan Bunko in Tokyo, part of the surviving material record of a church whose people could carry Japanese print to Europe and come home with a Roman education. The sentence on the flyleaf asks the reader to value the intention behind the thing given.

The handwriting is still legible. The intentions are not.

Sources & Further Reading

Cieslik, Hubert. “The Case of Christovão Ferreira.” Monumenta Nipponica 29, no. 1 (1974): 1–54. The standard study of the most famous of the fallen priests, and the source, at one remove, of the tradition that links Araki to the apostasy oaths.

Hazama, Yoshiki. “Kirishitan jidai ni okeru junkyō no rikai to kioku” [Understanding and Memory of Martyrdom in the Kirishitan Period]. Asia, Christianity, and Plurality 17 (2019): 11–22. Supplies Cerqueira’s sponsorship of Araki’s journey to Rome, the comparison with Pedro Kasui Kibe, and the account of a late reaffirmation and death from illness in confinement, set inside an argument about what the church’s martyrdom criteria exclude.

Morris, James Harry. Rethinking the History of Conversion to Christianity in Japan, 1549–1644. PhD thesis, University of St Andrews, 2018. Places the Ōmura arrest inside the Nagasaki crackdown of 1619, follows the Zúñiga and Flores prosecution through the Dutch torture that ended it, and is the authority for the dating that puts the apostasy oaths before Ferreira’s recantation.

Real Academia de la Historia. “Japón–España: 400 años de relaciones. Religión y política.” Undated. The Spanish account of the prosecution, including Zúñiga’s own acknowledgment that he had concealed his identity and the date of the August 1622 burnings at Nagasaki.

Sophia University. “Jōchi Daigaku Kirishitan Bunko kichō shiryōten o kaisai shimasu” [Exhibition of Rare Materials from Sophia University’s Kirishitan Bunko]. 2025. Confirms the Kirishitan Bunko’s preservation and exhibition of the 1599 Nagasaki Guia do Pecador; it makes no claim about Araki and is not used here for his biography.

Takase, Kōichirō. “Korobi bateren Tomasu Araki ni tsuite” [On the Apostate Priest Thomas Araki]. Shigaku 48, no. 4 (1978): 337–362. The study that identifies Araki as a secular priest rather than an expelled Jesuit, and the essential starting point for his institutional history.

Watanabe, Akihiko. “Neo-Latin in 17th Century Japan: Two Epistles from Japanese Seminarians to the Jesuit Superior General (ARSI Jap.Sin.33.75, 78).” JASCA 2 (2014): 137–148. Identifies Araki’s 1632 letter to a Dutch merchant and his reported use of Latin in a 1637 interrogation, and corrects the impression that the Roman dedication is his only substantial surviving text.

Watanabe, Akihiko. “Magdalen College MS. 228 and the Kirishitan Bunko Library Guia do Pecador: Further Traces of Kirishitan Neo-Latin.” International Journal of Human Culture Studies 26 (2016): 1–6. The transcription, translation and physical description of the dedication, made from the original in 2015, and the source for Araki’s approximate chronology and for the qualified inference, first argued by Harada, that he carried the book from Japan to Italy.