Samurai Sent Letter to Rome in 1585: Forgotten Mission

October 4, 2026

By TrivBits, History Desk — Published October 4, 2026

In the late 16th century, a group of samurai embarked on one of the most improbable diplomatic missions in history. These Japanese warriors crossed three continents to deliver letters from their lords to the Pope in Rome. The journey took years. The mission bridged two civilizations that could hardly have been more different, connecting feudal Japan with Renaissance Europe at a pivotal moment when both worlds were being reshaped by ambition, faith, and the lust for global influence.

This extraordinary expedition, known as the Tenshō embassy, represents a fascinating collision between East and West during an era when such encounters were exceedingly rare. The samurai sent letter and gifts to Pope Gregory XIII, hoping to forge an alliance that would strengthen Christianity in Japan while securing political and economic advantages for their domains.

Key Takeaways

Four young samurai departed Japan in 1582 on a diplomatic mission to meet the Pope in Rome, arriving in 1585 after years of travel.
The mission was organized by Jesuit missionaries and three Christian daimyō (feudal lords) from Kyushu who sought to strengthen ties with European powers.
The samurai envoys met Pope Gregory XIII and his successor Pope Sixtus V, presenting letters and becoming the first official Japanese embassy to Europe.
The mission lasted eight years total, but by the time the envoys returned to Japan in 1590, the political landscape had shifted dramatically against Christianity.
Within decades of their return, Japan’s rulers banned Christianity entirely, making this mission one of the last major exchanges between Japan and the West for over two centuries.
The embassy left lasting cultural impressions in Europe, where the samurai were received with fascination and treated as exotic dignitaries from a mysterious empire.

When Samurai Sent Letter to the Pope: The Tenshō Embassy

The Tenshō embassy began its journey in 1582, dispatched by three powerful Christian daimyō from Kyushu: Ōtomo Sōrin, Arima Harunobu, and Ōmura Sumitada. These lords had converted to Christianity following contact with Portuguese Jesuit missionaries who arrived in Japan in the mid-16th century. The mission was conceived by the Italian Jesuit Alessandro Valignano, who saw an opportunity to impress both Japanese converts and European benefactors with a grand diplomatic gesture.

Four teenage boys were chosen as envoys. They came from samurai families and had been educated in Jesuit seminaries. Their names were Itō Mancio, Chijiwa Miguel, Nakaura Julião, and Hara Martinho. None was older than fourteen when the journey began. They would spend their formative years traversing oceans and continents, experiencing worlds their ancestors could never have imagined.

The route itself was a testament to the expanding networks of the era. The embassy sailed from Nagasaki to Macau, then to Malacca, around the Cape of Good Hope, and finally to Lisbon. From Portugal, they traveled overland through Spain and into Italy. The journey to Europe alone consumed nearly three years, during which the young samurai encountered storms, disease, and the constant wonder of foreign lands.

Reception in Renaissance Europe

When the Japanese envoys finally reached Rome in 1585, they caused a sensation. Europeans had heard tales of Japan from merchants and missionaries, but few had ever seen actual Japanese people, much less samurai-class youth bearing official credentials from distant lords. Pope Gregory XIII received them with great ceremony, though he died shortly after their arrival. His successor, Pope Sixtus V, continued the warm reception.

The samurai presented letters written in elegant Japanese script, along with gifts including folding screens, lacquerware, and swords. These objects fascinated European observers. The craftsmanship was unlike anything produced in the West. The envoys themselves became objects of intense curiosity. They were invited to noble courts across Italy, Spain, and Portugal. Artists painted their portraits. Scholars questioned them about Japanese customs, language, and religion.

The mission achieved its immediate diplomatic objectives. The Pope sent return letters affirming his support for Christian missions in Japan. The envoys secured promises of continued Jesuit presence and even discussed potential trade advantages. For a brief moment, it seemed that Japan and Catholic Europe might forge a lasting partnership spanning the globe.

The Journey Home and a Changed Japan

The return voyage began in 1586, but the young men didn’t reach Japan until 1590. Eight years had passed since their departure. They had left as children; they returned as men who had seen more of the world than virtually any Japanese person in history. They brought back European musical instruments, printing presses, and books. They had learned Latin and Portuguese. They had met kings and cardinals.

But Japan had transformed in their absence. Toyotomi Hideyoshi had unified much of the country under his rule, establishing a centralized authority that previous eras had lacked. Initially tolerant of Christianity, Hideyoshi had grown suspicious of foreign influence. In 1587, he issued an edict expelling missionaries, though enforcement was inconsistent. The political climate was cooling toward the Christian faith that had sponsored the embassy.

The returned envoys found themselves in an increasingly precarious position. They had been trained as cultural ambassadors between civilizations, but the bridge they were meant to represent was crumbling. Some of the envoys became priests and continued missionary work despite growing dangers. Nakaura Julião was eventually martyred during the brutal persecutions that followed.

The End of an Era

By 1614, the Tokugawa shogunate banned Christianity outright. Missionaries were expelled or executed. Japanese Christians faced torture and death if they refused to renounce their faith. Japan entered a period of self-imposed isolation called sakoku that would last for over two centuries. The doors that had briefly opened in the 16th century slammed shut.

The Tenshō embassy became a historical curiosity, remembered in Japan as a footnote to the “Christian century” and in Europe as an exotic episode in the age of exploration. Yet the mission represented something profound: a moment when two vastly different civilizations attempted genuine dialogue and exchange. The samurai who carried letters across the world were participants in an early experiment in globalization, one that ultimately failed but left traces in both cultures.

Records from the embassy survive in European archives. Portuguese and Italian accounts describe the envoys’ journey. Japanese sources mention their departure and return. These fragments allow historians to reconstruct a remarkable chapter in the past when samurai warriors became unlikely diplomats, traversing an empire of distance to stand before the spiritual leader of Catholic Christendom.

Frequently Asked Questions

Why did Japanese lords send samurai to Rome?

Christian daimyō in Kyushu, supported by Jesuit missionaries, sent the embassy to strengthen political and religious ties with Europe. They hoped papal support would help Christianity flourish in Japan and potentially bring military or economic advantages. The mission also served as propaganda, demonstrating to Europeans that Christianity was taking root in distant Japan and warranted continued investment and missionary effort.

What happened to the samurai envoys after they returned?

The four envoys faced an increasingly hostile environment for Christians in Japan. Some became Jesuit priests and continued their religious work despite persecution. Nakaura Julião was martyred in 1633 during the Tokugawa shogunate’s brutal suppression of Christianity. The others’ fates are less clearly documented, but they lived through Japan’s dramatic shift from openness to isolation.

Did the embassy accomplish its goals?

In the short term, yes—the envoys met the Pope, received letters of support, and generated enthusiasm for Japanese missions in Europe. However, the long-term goals failed spectacularly. Christianity was banned in Japan within decades, and the hoped-for alliance between Japanese lords and European powers never materialized. The mission became a symbol of a path not taken in Japanese history.

How long did the entire journey take?

The complete mission lasted eight years, from 1582 to 1590. The outbound journey to Europe took approximately three years, the envoys spent about two years in Europe visiting various courts and cities, and the return voyage took another three years. This meant the teenage envoys spent nearly their entire adolescence traveling between two worlds.

The story of samurai carrying letters to Rome reminds us that even in centuries we consider isolated and provincial, ambitious individuals found ways to bridge vast distances and cultural divides. These young men witnessed both the promise and limits of cross-cultural exchange in an age when such contact was still rare, dangerous, and transformative.