Ii Naosuke

Naosuke is often introduced through two dramatic events: the treaty he authorized with the United States and the political crackdown known as the Ansei Purge. Those events matter, but they do not tell the whole story. Before becoming one of the most powerful officials in the country, he spent many years outside the direct line of succession, cultivating literature, calligraphy, martial practice, and tea. Understanding both sides helps us see why he acted as he did—and why his choices remain contested.

A young lord’s son in Hikone

Ii Naosuke was born in 1815 into the Ii house, whose hereditary domain was Hikone in present-day Shiga Prefecture. The family held an unusually important position in the Tokugawa order: the Ii were fudai daimyo, lords whose ancestors had served the Tokugawa before the shogunate was established. Their proximity to the ruling house brought influence, but it also meant that service to the shogun could become a family obligation. Naosuke grew up with the knowledge that his household’s standing was tied to the health of the regime.

He was one of many sons, and for much of his youth he did not appear destined to inherit the domain. At seventeen he entered Umoregi-no-ya, a modest residence whose name evokes buried wood. He remained there for fifteen years, living on a comparatively small allowance while older relatives occupied the family’s main line. The official English-language site for Umoregi-no-ya describes this long interval as the setting for his years of study and self-cultivation. It was a constrained life, but not an idle one.

Naosuke read, practiced calligraphy, trained in martial arts, and pursued several cultural disciplines. His early life complicates the image of a man formed only by political ambition. For years, the work available to him was inward and preparatory: learning to observe, to write, to host, and to refine his judgment. The name Umoregi-no-ya later carried a personal meaning in his life story, a reminder that status could be withheld and circumstances could change.

His fortunes shifted as the household succession changed. In 1850, after the death of his elder brother and predecessor, Naosuke became the head of the Ii family and lord of Hikone. He now held the domain’s responsibilities: overseeing administration, maintaining the castle town, serving the shogunate, and preparing for obligations that could draw his retainers into national affairs. A man who had once lived on a small stipend was suddenly a senior daimyo in a political order facing mounting pressure.

From domain lord to national statesman

The political world Naosuke entered was already unsettled. In 1853, Commodore Matthew Perry’s American ships arrived in Edo Bay, demanding that Japan open ports and establish relations. Tokugawa leaders had to weigh the danger of resisting a power whose ships carried modern weapons against the danger of yielding and appearing to abandon the country’s defenses. European and American powers were expanding their reach across Asia. Japanese officials could look to the Opium War and the unequal arrangements imposed on Qing China as a warning of what military weakness might invite.

Japan was not a single voice debating a single question. Daimyo, court nobles, shogunate officials, and scholars disagreed over whether to expel foreigners, negotiate, strengthen coastal defenses, or reform political authority. Even those who favored negotiation could oppose a particular treaty or the way it was concluded. The question of who could legitimately decide policy became inseparable from the question of what policy Japan should follow.

As lord of Hikone, Naosuke was a senior figure in the shogunate’s council system. In April 1858, he was appointed tairō, or chief elder, an exceptional office that placed him at the head of the shogunate’s government during a moment of crisis. His appointment gave him the authority to press decisions, but it did not remove the disagreements surrounding them. The office put him at the point where urgency, institutional authority, and public legitimacy collided.

A second dispute sharpened the crisis. Shogun Tokugawa Iesada had no heir, so leaders had to decide who would succeed him. One possibility was the young Tokugawa Yoshitomi, a member of the Kii branch who would later take the name Iemochi. Another was Hitotsubashi Yoshinobu, a more mature figure whom many reform-minded supporters considered better equipped to lead. Naosuke backed Yoshitomi. To his opponents, that decision favored continuity and the existing power structure; to its supporters, it protected the hereditary order from an uncertain political struggle.

Treaty, urgency, and the question of authority

The treaty question demanded an equally consequential decision. On July 29, 1858, Naosuke’s government signed the Treaty of Amity and Commerce with the United States without prior imperial approval. The agreement opened additional ports and established commercial relations, but it also included provisions that limited Japan’s control over tariffs and legal jurisdiction. These were not equal terms. The government faced a choice between accepting an arrangement negotiated under military pressure and risking a confrontation for which it believed Japan was not prepared.

The National Diet Library preserves a letter in which Naosuke argued that signing was necessary in the circumstances and warned that Japan might suffer a fate like Qing China. That letter does not settle whether his decision was right; it does help explain the logic he gave for it. He saw delay as dangerous and believed a treaty could buy time for Japan to strengthen itself. Critics answered that signing without the emperor’s sanction damaged political legitimacy and invited further foreign pressure.

Naosuke’s choice therefore had two dimensions. It was a calculation about power abroad, and it was a claim about authority at home. The shogunate’s leaders acted as if they could conclude an urgent agreement on the country’s behalf; their opponents argued that such a decision required imperial consent. The disagreement intensified a larger transformation in which the imperial court, once distant from daily government, became a rallying point for those challenging the shogunate.

The Ansei Purge: restoring order through repression

Opposition to the treaty and the succession decision grew quickly. Some critics had close ties to the imperial court; others were daimyo, retainers, or activists who wanted a stronger role for the emperor. The shogunate regarded the challenge not only as disagreement over policy but as a threat to its ability to govern. Naosuke answered with forceful measures intended to contain dissent and secure the new political arrangement.

Beginning in the autumn of 1858, authorities arrested, disciplined, or removed people associated with resistance. The campaign later became known as the Ansei Purge, after the era name then in use. Among those targeted were court nobles, domain figures, scholars, and retainers. Some were imprisoned or placed under house arrest; others were forced to leave office or received severe punishment. The National Diet Library’s chronology dates the start of the purge to October 13, 1858, and describes it as a response to opposition over the treaty and succession.

The purge makes it difficult to cast Naosuke as a simple reformer or a simple villain. He did not merely watch a crisis unfold; he used the authority of his office to suppress opponents. His supporters could describe this as the restoration of order at a moment when rival factions risked paralyzing the government. His critics experienced it as an assault on legitimate debate and an abuse of power. The state’s coercive response deepened the resentment it aimed to silence.

It is important to distinguish the causes from the consequences. The treaty, the succession dispute, and a wider challenge to shogunal authority all mattered. No single action explains the upheaval by itself. The purge helped make Naosuke a focus for anger, while the wider debate over foreign policy and the emperor’s role continued to expand. In attempting to close political space, the government helped make opposition more urgent and more personal.

A tea practitioner amid public turmoil

Naosuke’s commitment to tea offers a different lens on his character. He studied the practice seriously and wrote about it, treating the tea gathering as an encounter that demanded attention from both host and guest. His booklet, Chanoyu ichi-e shū, was completed around 1857 after revisions. The Hikone Castle Museum describes it as a record of his tea philosophy, including the idea that each gathering should be treasured as a once-in-a-lifetime occasion.

This ideal is often associated with the phrase ichi-go ichi-e: one encounter, one opportunity. Naosuke did not invent the words; his writing is important because it expounds the sensibility behind them and connects that sensibility to the careful conduct of a tea gathering. A meeting cannot be repeated in exactly the same way. The season, utensils, guests, and state of mind all change. To host well is to notice the particular moment rather than treat it as routine.

The museum’s account also discusses dokuza kannen, a host’s reflection after the guests have departed. The gathering continues inwardly: the host considers what happened, the care shown, and what could be improved. This is not only etiquette. It is an ethical discipline of attention, hospitality, and self-examination. Naosuke’s tea writings survive as evidence of a thoughtful practice rather than a decorative hobby.

There is a striking tension here. In public office, Naosuke acted decisively and deployed punishment against opponents; in tea, he valued a moment that could not be duplicated and required careful consideration of others. The two spheres should not be forced into a neat moral lesson. They show instead that a person can hold several commitments at once—and that refinement in one part of life does not erase the consequences of power in another.

Sakuradamon: a political life cut short

On March 24, 1860, Naosuke was attacked and killed outside Sakuradamon, a gate of Edo Castle. The attackers were rōnin associated with the Mito domain, with a Satsuma participant also recorded in the museum account. Naosuke was on his way to the castle when his procession was ambushed. The traditional Japanese calendar date is the third day of the third month; sources may give that date instead of the Gregorian one.

The Hikone Castle Museum’s scroll of the Sakuradamon Incident depicts the attack as a historical event, preserving how the episode was remembered in visual form. The museum identifies the attackers as rōnin from Mito and Satsuma and dates the incident to March 3 by the traditional calendar. The snowy setting has become inseparable from the public memory of the assassination: a moment of ceremony and vulnerability at the threshold of the shogun’s seat of power.

Naosuke’s death did not immediately end the Tokugawa shogunate. The government continued for more than a decade, and the political settlement remained contested. But the killing showed that a senior official could be struck down in the capital itself. It weakened the aura of shogunal security and made the cost of political conflict visible. His removal also left the government without the leader who had driven its policy through the crisis, though the divisions he confronted did not disappear with him.

How to remember Ii Naosuke

Naosuke’s legacy is difficult because it sits at the intersection of decisions that can be judged by different standards. The treaty could be seen as a pragmatic attempt to avoid a military disaster, and also as an unequal agreement made without the emperor’s approval. The purge could be described as an effort to preserve an unstable government, and also as repression that punished political dissent. The succession choice could be defended as continuity, and also criticized for closing off an alternative path.

A balanced account does not need to pretend these choices were morally neutral. It can recognize that Naosuke acted under real pressure while also naming the harm done by coercion. Nor does it need to assume that his cultural achievements redeem his public actions. His tea writings are worth reading on their own terms, and his political decisions should be evaluated for their consequences. Keeping both in view gives a richer history than either admiration or condemnation alone.

Naosuke’s life also reminds us that Tokugawa Japan was not simply sealed off from the world and then suddenly opened. It was a society with active diplomatic debates, rival centers of authority, and leaders attempting to respond to a changing balance of power. The shogunate’s choices were shaped by foreign pressure, but they were also contested within Japan. The crisis around Naosuke reveals strain on an existing political order and the emergence of new claims to legitimacy.

Explore the world around Naosuke

To place Naosuke within the wider history of the Ii house and the samurai, continue with our profiles of Ii Naomasa and Ii Naotora, or read about Tokugawa Ieyasu, founder of the shogunate that Naosuke served centuries later.

For primary and museum context, consult the National Diet Library’s profile of Ii Naosuke and its chronology of modern Japan. The Hikone Castle Museum’s Sakuradamon scroll and its account of Chanoyu ichi-e shū offer valuable museum perspectives. The Umoregi-no-ya site introduces the residence where Naosuke spent fifteen formative years.

A life of decision and reflection

Ii Naosuke remains compelling because his life holds a contradiction that history cannot smooth away. He was a statesman who made decisions under extraordinary pressure and used state power to silence resistance. He was also a writer and tea practitioner who urged people to value an encounter that would never come again. His world was changing quickly, and he tried to shape that change through authority. The results were consequential, contested, and ultimately beyond his control.

At Hikone, in the tea room, and at Sakuradamon, we see different fragments of the same life. The young man at Umoregi-no-ya spent years preparing without knowing what position he would hold. The tairō faced choices that he believed could determine Japan’s future. The tea practitioner wrote about attention to a single meeting. Together these details make Naosuke more than a symbol of either resistance or reform: they make him a human actor in a political order near its breaking point.