The Christian Century: Faith and Power in Feudal Japan

A Percentage Problem

Here is a number that should stop you: three hundred thousand.

At the high-water mark of Christianity in Japan, roughly the first decade of the seventeenth century, approximately three hundred thousand Japanese had accepted baptism. In a country of perhaps twenty million, that was about one and a half percent of the total population. A small minority, in other words. An afterthought, statistically.

And yet this one and a half percent terrified the most powerful military government in Asia into a campaign of persecution so thorough, so sustained, and so inventive in its cruelty that it has few parallels in the early modern world. The Tokugawa shogunate, which controlled an army, a bureaucracy, and an intelligence apparatus of formidable sophistication, spent the better part of four decades attempting to eradicate a religion practised by fewer than one in sixty of its subjects. They killed thousands. They tortured thousands more. They exiled hundreds of mixed-heritage children to Macau. They banned an entire nation of European merchants under penalty of death. They confined another to a tiny artificial island. They deployed an annual ritual of ideological enforcement, the fumi-e, in which citizens were compelled to trample images of Christ, that persisted, in some regions, for over two centuries.

The disproportion tells you something important. The Tokugawa were not afraid of the numbers. They were afraid of what the numbers represented: a system of loyalty that placed God above the shogun, a foreign institution that answered to Rome, a commercial network that enriched their rivals, and a historical precedent, the Spanish Philippines, conquered by exactly this combination of priests and soldiers, that demonstrated what could happen if you let the one and a half percent become five.

The story of how Japan acquired three hundred thousand Christians, and how it attempted to destroy them, is the story of the Nanban period itself.

The Useful Heresy

Christianity arrived in Japan in the luggage of commerce. Francis Xavier stepped ashore at Kagoshima in August 1549 because Portuguese merchants had been visiting Kyushu since 1543 and because a fugitive samurai named Anjiro had persuaded him that the Japanese were a people uniquely receptive to reason. Xavier spent two years in the country, baptised roughly a thousand converts, and departed with a strategic blueprint that would govern the mission for decades: adapt to Japanese culture, court the feudal lords, present Christianity as a faith of authority and prestige, and, above all, stay close to the trade.

The detailed story of Xavier's campaign, his Dainichi blunder, and his encounters with the daimyō of Kagoshima, Hirado, Yamaguchi, and Bungo are told elsewhere on this site. What matters here is the pattern he established: Christianity spread through Japan not as a grassroots spiritual movement but as a political transaction. Daimyō tolerated the missionaries, and, increasingly, accepted baptism themselves, because the missionaries came bundled with Portuguese commerce. Where the Jesuits went, the Great Ship followed. Where the Great Ship docked, silk flowed in and silver flowed out. A daimyō who welcomed the padres was a daimyō whose port attracted the most profitable single vessel in the Pacific.

This was not purely cynical. Some daimyō may have been genuinely moved by Christian teaching. But the structural incentive was clear, and the Jesuits understood it perfectly. They cultivated the powerful. They presented gifts of European curiosities, clocks, spectacles, muskets, glassware, that demonstrated the technological sophistication of the civilisation behind their faith. They positioned themselves as indispensable intermediaries between Portuguese merchants and Japanese buyers. The mission was, by design, a political and commercial operation as much as a spiritual one.

The first daimyō to convert was Ōmura Sumitada in 1563, baptised as Dom Bartolomeu. His motives were mixed, he wanted Portuguese trade for his port and Portuguese guns for his wars, but his commitment was genuine enough that he ordered mass conversions in his domain, destroyed Buddhist temples and Shinto shrines, and in 1580 took the extraordinary step of ceding the port of Nagasaki to the Society of Jesus. The Jesuits now administered a Japanese harbour town. They had gone from guests to landlords.

By the 1580s, the list of Christian daimyō included some of the most powerful lords in Kyushu: Arima Harunobu (Dom Protasio), who hosted Jesuit seminaries and converted to attract the Great Ship; Konishi Yukinaga (Dom Agostinho), a brilliant military commander who would serve under Hideyoshi before being executed after Sekigahara; and the formidable Ōtomo Sōrin himself, who accepted baptism as Dom Francisco in 1578 after decades of quietly protecting the mission.

The numbers tracked the political patronage. From roughly six thousand converts in the 1550s, the Christian population surged to twenty or thirty thousand in the 1560s, a hundred thousand by the late 1570s, two hundred thousand by the mid-1580s. Each wave corresponded to a new daimyō conversion, a new territory opened, a new round of mass baptisms ordered by a lord whose subjects had little practical choice in the matter.

Nobunaga: The Cynical Patron

The man who did more than anyone to enable the Jesuits' expansion never converted and almost certainly never considered it.

Oda Nobunaga was the first of Japan's three great unifiers, the warlords who, over the course of half a century, hammered the chaos of the Sengoku period into a centralised state. He was brilliant, violent, ruthlessly pragmatic, and possessed of a personal vanity so expansive that he reportedly entertained the idea of being worshipped as a living god. He was also locked in a vicious struggle with the Buddhist establishment, particularly the Ikkō-ikki, the militant Pure Land Buddhist leagues whose fanatical devotees had waged open war against secular authority and whose fortified temple-cities represented a direct challenge to his power.

Nobunaga's solution to the Ikkō-ikki problem was brutal. He burned their strongholds, massacred their followers, and in 1571 destroyed the great monastery complex of Mount Hiei, slaughtering, by some accounts, thousands of monks, women, and children. The Buddhist clergy were his enemies. The Jesuits, who also opposed Buddhism and who commanded no military force of their own, were therefore useful.

Nobunaga granted the missionaries freedom to preach. He gave them land in Kyoto and Azuchi. He entertained the Jesuit fathers at his court, engaged them in theological discussions he had no intention of taking seriously, and developed a genuine personal friendship with the Jesuit Luís Fróis, whose monumental Historia de Japam would become the most important European source for the entire Nanban period. Nobunaga was fascinated by European science and technology: clocks, maps, the globe, the concept of a spherical earth. He was not fascinated by European theology.

The Jesuits understood the transaction. They had a patron who protected them, promoted them, and asked nothing in return except that they continue to serve as a counterweight to the Buddhist institutions he was destroying. It was, from the mission's perspective, an ideal arrangement. It was also temporary. Nobunaga was assassinated by a rebellious vassal in June 1582, and the Jesuits' political position was suddenly, dramatically, unprotected.

Valignano: The Man Who Made It Work

If Xavier was the mission's founder and Nobunaga its inadvertent protector, Alessandro Valignano was its architect. The Italian Visitor-General arrived in Japan in 1579, surveyed the state of affairs with a strategist's eye, and concluded that the mission was on the verge of either greatness or collapse.

The problem was Francisco Cabral. The Portuguese Mission Superior had overseen an explosive growth in conversions, from thirty thousand to over a hundred thousand during his tenure, but he had done so while actively despising the people he was converting. Cabral refused to learn Japanese. He opposed admitting Japanese converts to the priesthood. He doubted the sincerity of Japanese faith and ran the mission with a rigidity that was demoralising both European missionaries and Japanese catechists.

Valignano dismissed him in 1581 and rebuilt the mission from its foundations. His reforms, the language requirement, the cultural adaptation policy, the establishment of seminaries, the Tenshō Embassy, are detailed in the articles on Xavier and the Embassy elsewhere on this site. What matters here is the scale of his ambition: Valignano was not trying to create a European outpost in Japan. He was trying to create a Japanese Church. The distinction was revolutionary within the Society of Jesus and it set the mission on a trajectory that would, at its peak, sustain over three hundred thousand converts, two hundred churches, and an educational infrastructure that included a novitiate, a college, and multiple seminaries.

By 1582, the number of Christians had reached approximately a hundred and fifty thousand, overseen by some seventy-five Jesuits and hundreds of Japanese lay catechists known as dōjuku. By the early 1600s, the figure had doubled again. The Christian Century was at its zenith.

It had about fifteen years left.

Hideyoshi: The Turn

Toyotomi Hideyoshi took power after Nobunaga's assassination and completed the military unification of Japan with a speed and ferocity that left even his allies breathless. He was a man of peasant origin, titanic ambition, and an acute sensitivity to anything that threatened his authority. For five years, he maintained Nobunaga's tolerant stance toward the Jesuits. Then, in the summer of 1587, he conquered Kyushu and saw the Christian domains for himself.

What he saw alarmed him. The Jesuits controlled Nagasaki. Christian daimyō were compelling their subjects to convert and destroying ancestral shrines. The faith demanded a loyalty to God and Pope that superseded loyalty to the secular ruler, a structural challenge to the feudal order that Hideyoshi explicitly compared to the Ikkō-ikki threat his predecessor had spent a decade destroying. And the Portuguese were buying Japanese people and selling them into slavery overseas.

On July 24, 1587, Hideyoshi issued his edict of expulsion. The analysis of that edict and its consequences, the decade of uneasy toleration, the San Felipe incident, the crucifixion of the Twenty-Six Martyrs in 1597, is traced in the Sakoku article. What matters for the Christian Century's arc is the paradox that the edict revealed: Hideyoshi wanted the missionaries gone but the merchants to stay, and the two were so deeply entangled that separating them proved impossible. The Jesuits went underground. The trade continued. The Christian community actually grew during the years of nominal prohibition, reaching roughly three hundred thousand by 1600.

The paradox would not be resolved until someone demonstrated that the trade and the mission could be unbundled, that profitable commerce with Europe did not require tolerating a single priest. That demonstration arrived, providentially, in the form of a half-dead Englishman on a wrecked Dutch ship.

The Protestant Solution

William Adams washed ashore in April 1600, and his arrival changed the calculus of everything.

Adams and the Dutch merchants who followed him, establishing a factory at Hirado in 1609, proved to the Tokugawa shogunate what Hideyoshi had never been able to verify: that European trade could be had without European religion. The Dutch were Protestants. They were happy to sell guns, silk, and manufactured goods without attaching missionaries to the transaction. They were also delighted to poison the well against their Catholic rivals, whispering to Tokugawa Ieyasu that the Jesuits were agents of Iberian imperialism who had been expelled from multiple European countries as stirrers of sedition.

Adams became Ieyasu's advisor on foreign affairs, was granted samurai status, and spent two decades helping the shogunate navigate the bewildering factional politics of European maritime competition. His central message was consistent: you do not need the Catholics.

The Okamoto Daihachi scandal of 1612, a sordid affair of bribery and forgery involving Christians within the shogunate's own administration, provided the final pretext. In early 1614, Ieyasu issued his definitive ban. Christianity was prohibited. Churches were to be demolished. Missionaries were to be expelled.

The Christian Century, as an era of open practice, was over. The era of persecution had begun.

The Machinery of Breaking

The Tokugawa persecution of Christianity evolved, over three decades, from crude public violence into a refined apparatus of psychological destruction. The evolution was deliberate, and it was driven by a single insight: martyrs were counterproductive.

The early persecutions under Ieyasu's son Hidetada relied on mass execution as spectacle. The Great Martyrdom of Kyoto in 1619, fifty-two Christians, including women and children, burned alive, and the Great Martyrdom of Nagasaki in 1622, fifty-five burned or beheaded, their ashes scattered into the sea to prevent the gathering of relics, were designed to terrify the Christian population into submission. They failed. The crowds who witnessed the executions were often more inspired than intimidated. The martyrs died singing hymns. Their constancy strengthened the underground Church.

Under the third shogun, Tokugawa Iemitsu, the strategy shifted. The goal was no longer to kill Christians but to break them, to produce apostates rather than saints. A dead priest was a relic. A living priest who had publicly renounced his faith was proof that the Christian God was powerless.

The instrument of this shift was ana-tsurushi, the torture of the pit. The victim was bound, suspended upside-down over a trench, and small incisions were made behind the ears to allow blood to drain slowly, prolonging consciousness for hours or days. It was specifically designed to be unbearable without being immediately lethal, to push the victim past the limits of endurance until apostasy seemed like mercy.

The technique's most devastating success was Cristóvão Ferreira. The Jesuit Provincial, the highest-ranking missionary in Japan, broke under ana-tsurushi in October 1633, after six hours in the pit. He renounced his faith, accepted a Japanese name, married a Japanese woman, and spent the rest of his life helping the authorities identify and interrogate captured Christians. His apostasy sent shockwaves through the Catholic world. If the Provincial could be broken, anyone could be broken.

The architect behind this perfected machinery was Inoue Masashige, appointed as Japan's first Inquisitor General of religions in 1640. Inoue understood the psychology of persecution with a sophistication that his predecessors had lacked. He maintained a specialised prison, the Kirishitan-yashiki, on his Edo estate, where captured priests were housed alongside broken apostates like Ferreira, creating an environment designed to demoralise new arrivals before the interrogation even began. His goal was not a body count. His goal was demonstrated impotence, proof, visible and public, that the faith the missionaries had brought to Japan could not protect those who professed it.

By 1644, the last remaining missionary in Japan had been either martyred or forced to apostatise. The Japanese Christians were entirely cut off from the global Church.

The Shimabara Catalyst

The Shimabara Rebellion of 1637–38, the Christian-bannered peasant uprising that required over a hundred thousand shogunal troops to suppress and ended with the massacre of virtually all thirty-seven thousand defenders at Hara Castle, is treated in detail in the Sakoku article. Its significance for the Christian Century is straightforward: it was the proof the Tokugawa needed that Christianity was not merely a theological nuisance but a military threat.

The rebels had fought under Portuguese-language banners. They had rallied behind a teenage messiah. They had inflicted thirteen thousand casualties on the shogunate's forces. They had killed the shogunate's first commanding general. And they had done all of this in the name of a faith that the regime had been trying to eradicate for two decades.

Four months after Hara Castle fell, the final sakoku edict expelled the Portuguese from Japan permanently. The cascade of exclusion edicts, five laws issued between 1633 and 1639, progressively sealing the country's borders, transformed Japan from a node in the global maritime network into a controlled enclosure, open only to the Dutch, the Chinese, the Koreans, and the Ryukyuans through carefully managed channels.

The Scale of It

The Jesuit chronicler Antonio Cardim, writing in 1650, documented approximately 2,128 martyrs between 1614 and 1650, including seventy-one European missionaries. Modern scholarship, using the stricter definition of martyrdom that requires non-violent resistance, puts the figure at roughly four thousand. The thirty-seven thousand dead at Shimabara are not counted among the martyrs because they took up arms.

These are the documented deaths. The broader scope of the persecution, the forced apostasies, the exiles, the families broken by the fumi-e ritual, the generations who lived in secrecy and fear, is measured not in thousands but in hundreds of thousands. Japanese sources from the period cite up to three hundred thousand people punished between 1614 and 1640 alone. The figure almost certainly includes forced apostates and exiles alongside those who were killed, but its scale is consistent with a campaign of suppression that touched every community where Christianity had taken root.

The 287 mixed-heritage children and their Japanese mothers deported to Macau under the fourth sakoku edict of 1636 are a footnote in most histories. They are also a measure of the regime's thoroughness: not only the faith but the blood had to be removed.

God in the Closet

The faith survived.

In the mountains and fishing villages of Kyushu, on the Gotō Islands, on Ikitsuki, in the hills above Nagasaki, in the Amakusa archipelago, an estimated twenty to fifty thousand believers preserved their faith in secret for over two hundred years. Without priests. Without sacraments. Without any contact with the Church they belonged to.

They called themselves Kakure Kirishitan, the Hidden Christians, and they organised into tight-knit confraternities modelled on the confraria structure the Jesuits had established centuries earlier. Lay leaders assumed spiritual duties that had once belonged to priests. The mizukata, the “officer of water”, performed secret baptisms on newborns. Sacred images were hidden inside Buddhist altars or concealed in closets, becoming known as nandogami, “Gods in the Closet.” The Virgin Mary was venerated in the guise of Maria Kannon, outwardly indistinguishable from the Buddhist goddess of mercy. Prayers were transmitted orally, generation after generation, in a garbled fusion of Latin, Portuguese, and Japanese that the speakers no longer fully understood but refused to abandon.

The orashio, from the Latin oratio, prayer, survived as phonetic sequences, their meaning worn smooth by repetition until they sounded like incantations. The liturgical calendar was preserved. The sacrament of baptism was preserved. The essential structure of belief, one God, the Trinity, the Virgin, the saints, the promise of salvation, was preserved, wrapped in layers of Buddhist and Shinto practice that served as both camouflage and, over time, genuine syncretism.

They were forced to participate in Buddhist funerals and Shinto festivals. They trampled the fumi-e when ordered, then performed secret acts of penance afterward. They lived double lives, outwardly compliant subjects of the Tokugawa order, inwardly members of a community that had been waiting for the priests to return since the 1640s.

The Door Opens

On March 17, 1865, in the newly built Oura Church in Nagasaki, constructed by French missionaries from the Société des Missions Étrangères de Paris who had arrived after Japan's forced reopening, a group of villagers from the nearby community of Urakami approached Father Bernard Petitjean. They asked three questions: Did the church honour Santa Maria? Were the priests celibate? Did they obey the Pope in Rome?

Petitjean answered yes to all three. The villagers revealed that they were Christians. Their families had preserved the faith, in secret, for two hundred and twenty years.

The “resurrection of the Kirishitan” astonished the Catholic world. Pope Pius IX called it a miracle. It was also, almost immediately, a disaster. The Meiji government, which had overthrown the Tokugawa shogunate but inherited its anti-Christian legislation, arrested over three thousand hidden Christians in what became known as the Fourth Urakami Kuzure. They were exiled to twenty-one domains across western Japan, subjected to forced labour and torture. Over six hundred and sixty died. It was not until 1873, under intense diplomatic pressure from Western nations, that the Meiji government finally abolished the anti-Christian edicts.

When freedom came, the hidden Christian communities split. Roughly half reconciled with the Roman Catholic Church, accepting its sacraments and its authority. The other half, the hanare, “the separated”, refused. They had preserved the faith their ancestors had died for. They had kept it alive through two and a half centuries of persecution, secrecy, and improvisation. They did not want Rome to tell them they had been doing it wrong.

The separated communities maintained their syncretic folk Christianity, their orashio, their Maria Kannon, their God in the Closet, as a living tradition, honouring the martyrs by practising exactly the religion the martyrs had passed down. By the late twentieth century, as the last generation of traditional practitioners aged and died, these communities were vanishing. In 2018, UNESCO inscribed the “Hidden Christian Sites in the Nagasaki Region” as a World Heritage Site, a monument to a faith that survived everything the most powerful government in Asia could bring against it, and that is now, at last, quietly disappearing.