Naitō Joan

Who They Were

Naitō Joan (内藤如安, ないとう じょあん) was a samurai who lived from 1550 to 1626, spanning the last decades of the Muromachi period (1336–1573) and the early Edo period. He is remembered less as a battlefield commander than as a Catholic convert, a castle lord, and a man whose life traced the arc of early Japanese Christianity from its first flowering to its violent suppression.

He was born into the Naitō family and was the son of Matsunaga Nagayori. His mother was a daughter of Naitō Kunisada, and she was Nagayori's lawful wife. He held Yagi Castle during the Civil War period, the long era of provincial conflict that preceded the unification of Japan under Oda Nobunaga and Toyotomi Hideyoshi.

His family was unusual in the history of Japanese Christianity. His sister, Naitō Julia, became one of the most prominent women catechists in Japan, a figure who instructed converts and sustained the faith community during the years of persecution. The two siblings together represent a rare case of a samurai household in which multiple members took leading roles in the early Japanese church.

Life and Career

Naitō Joan was born in 1550, in the nineteenth year of the Tenbun era (天文, てんぶん), a period when Portuguese traders and Jesuit missionaries were first establishing themselves in western Japan. He was known in his earlier years as Naitō Tadatoshi (内藤忠俊). His father, Matsunaga Nagayori, was a samurai of the region, and through him Joan inherited both a military position and a network of local alliances.

In 1564, at around fourteen years of age, he was baptised into the Catholic Church and took the baptismal name Joan, derived from the Portuguese form of the name John. This was early in the history of the Japanese mission, only a few years after Francis Xavier's arrival in 1549, and Joan's conversion placed him among the first generation of Japanese Christian samurai.

Oda Nobunaga recognised his abilities and appointed him Magistrate of Kameoka, in what is now Kyoto Prefecture. In 1573, Joan was given the task of guarding the Hanano Gosho, the palace in Kyoto of the shōgun Ashikaga Yoshiaki, with a force of 2,000 soldiers. This was a position of considerable trust, placing him at the centre of the political drama that ended the Ashikaga shogunate and consolidated Nobunaga's power.

The decades that followed brought the unification of Japan under Nobunaga and then Hideyoshi, and later the establishment of the Tokugawa shogunate. Under Tokugawa rule, Christianity came under increasing suspicion as a foreign allegiance that threatened the state. In 1614, the shogunate issued an edict banning Christianity and ordering the expulsion of missionaries and the arrest of prominent believers. Naitō Joan was among those banished. He was sent to Manila, in the Spanish Philippines, where a Japanese Christian exile community had formed. He died there in 1626.

Why They Matter

Naitō Joan's career sits at the intersection of three of the most important developments in sixteenth- and seventeenth-century Japan: the unification wars, the rise of the Christian mission, and the shogunate's eventual turn against that mission.

As a samurai appointed by Nobunaga to guard the shōgun's palace in 1573, he was a direct participant in the political manoeuvres that ended the Ashikaga shogunate. The defence of the Hanano Gosho with 2,000 men was not a minor assignment; it placed Joan in the capital at a decisive moment, entrusted with the safety of the sitting shōgun.

As a Christian, he belonged to a small but influential cohort of samurai converts who shaped the early Japanese church. His baptism in 1564 made him one of the earliest Japanese samurai Christians, and his family produced in his sister Julia one of the faith's most important lay leaders. The Naitō household therefore offers a rare window into how Christianity took root among the warrior class, and how that class was later forced to choose between faith and survival.

His banishment to Manila in the wake of the 1614 edict makes him a witness to the end of the Christian century in Japan. He did not die in battle or in Japan, but in exile, in a Spanish colonial city, as a member of a displaced religious community. His life thus spans the entire arc from the arrival of the missionaries to their expulsion.

The Name in Japanese

The name is written 内藤如安 and read ないとう じょあん in kana. In romaji it is rendered Naitō Joan, with a macron over the final "o" of the family name to mark the long vowel.

Breaking it down character by character:

内 (ない, nai) — "inside," "within," or "inner." In the surname 内藤 it contributes the sense of something interior or belonging to the household.

藤 (とう, tō) — "wisteria." This character appears in a great many Japanese surnames, including Fujiwara (藤原) and Tachibana (橘). Its use in 内藤 is traditional and does not carry a literal meaning about the plant; it is a conventional surname element.

Together, 内藤 (ないとう, Naitō) is the family name. It is a surname with a long history among warrior families, and it should be written as one unit.

如 (じょ, jo) — "as," "like," or "thus." This character is often used in Buddhist and literary names, and here it forms the first element of the baptismal name.

安 (あん, an) — "peace," "calm," or "safety." It is a common element in personal names and carries a sense of tranquillity.

Together, 如安 (じょあん, Joan) is the personal name. Crucially, this is not a native Japanese name but a rendering of the Christian name João, the Portuguese form of John. The Jesuits and their Japanese converts wrote European baptismal names using kanji chosen for their phonetic value, and 如安 was the standard rendering for João. The name therefore looks like a Japanese personal name on the page but is in fact a Christian name in disguise, a small but telling example of how the Japanese mission adapted the written language to its purposes.

Legacy

Naitō Joan's legacy is bound up with the memory of the "Christian century" in Japan, the roughly hundred-year period between the arrival of Francis Xavier in 1549 and the final expulsion of the missionaries and suppression of the faith in the 1630s.

He is remembered chiefly through two threads. The first is his role as a Christian samurai in the service of Oda Nobunaga, a combination that was possible in the 1560s and 1570s but became impossible after the anti-Christian edict of 1614. The second is his family: his sister Naitō Julia is a well-documented figure in the history of the Japanese church, and the two of them together illustrate how Christianity spread within a single samurai household.

His death in Manila in 1626 places him among the Japanese Christians who died in exile rather than renounce their faith. He did not leave behind a written account of his life, and much of what is known about him comes from missionary records and later histories of the Japanese church. His name survives in those records as a reminder that the Christian mission in Japan was not only a matter of foreign priests and peasant converts, but also of samurai families who staked their position and ultimately their lives on a new faith.