Ii Naosuke

Ii Naosuke
Name	Ii Naosuke
Native name	井伊 直弼
Birth date	1815-03-29
Birth place	Hikone, Hikone
Death date	1860-03-24
Death place	Edo
Nationality	Japan
Occupation	Daimyō, Rōjū, Tairō
Known for	Signing the Harris Treaty, leading the Ansei Purge

Ii Naosuke (1815–1860) was a prominent Daimyō of the Hikone Domain, senior statesman in the late Tokugawa administration, and holder of the title Tairō. He played a central role in opening Japan to U.S. diplomacy through the Harris Treaty and in enforcing internal order via the Ansei Purge, actions that polarized contemporaries such as Tokugawa Iemochi, Kuroda Kiyotaka, Hotta Masayoshi, and Sakamoto Ryōma. His decisions influenced interactions with powers including the United States, United Kingdom, France, Russia, and Netherlands and affected domains like Satsuma Domain, Chōshū Domain, Kaga Domain, and Mito Domain.

Early life and family

Born into the Ii clan at Hikone Castle in Ōmi Province, he was the son of Ii Naonaka and descended from a lineage that served the Tokugawa. Educated in the Confucian and administrative traditions of the bakufu bureaucracy, he interacted with retainers from Hikone Domain, scholars from Yushima Seidō, and officials connected to the Edo Castle household. His family ties linked him by marriage and alliance to notable houses including the Matsudaira clan, Toda clan, and connections reaching Aizu Domain and Okayama Domain, shaping his network among daimyō such as Matsudaira Yoshinaga and Asano Naritaka.

Political rise and Bakufu career

Rising through service in the shogunate, he served in key offices under shōguns Tokugawa Ieyoshi and Tokugawa Iemochi and worked alongside elder councilors like Junei and Sakai Tadaaki. As Rōjū, he negotiated fiscal measures with domain leaders from Hizen Domain and administrators in Nagasaki while confronting crises involving Morrison Incident-era pressures and black ships exemplified by Commodore Perry. His tenure involved coordination with diplomats such as Townsend Harris, interactions with foreign legations in Edo, and dealings with trading posts like the Dejima settlement managed by the Dutch East India Company heritage advisors.

Ansei Purge and domestic policies

In response to dissent from imperial loyalists in Kyoto, outspoken daimyō from Chōshū Domain, and court nobles like Kobayashi Issa-era critics, he initiated the Ansei Purge to suppress opposition, targeting figures associated with the sonnō jōi movement and factions tied to Mito and Satsuma. He ordered arrests and punishments of officials, scholars from Mito school circles, and retainers linked to proponents such as Hayashi Ōen and critics in Kyoto Imperial Palace politics. His domestic policies aimed to centralize authority vis-à-vis powerful domains including Kaga Domain and Tosa Domain and to implement reforms affecting rice taxation debated with advisors like Matsudaira Shungaku.

Foreign relations and the Harris Treaty

Facing pressure from United States envoy Townsend Harris, British representatives like James Bruce, French envoys such as Gustave Duchesne de Bellecourt, and Russian missions including Yevfimiy Putyatin, he endorsed treaties that opened ports including Yokohama and modified relations codified in the Harris Treaty and related unequal treaties paralleling agreements signed by the Treaty of Kanagawa and Anglo-Japanese Treaty of Amity and Commerce. He balanced demands from the British Empire and French Empire with concerns about extraterritoriality and customs duties, negotiating with shōgunal colleagues and domain representatives while countering samurai activists who opposed concessions promoted by Western diplomats and traders in treaty ports.

Assassination and aftermath

On March 24, 1860, he was assassinated near the Sakuradamon gate of Edo Castle by samurai from Mito Domain and Shirakawa-aligned retainers in an event known as the Sakurada-mon Incident. His killers included rōnin and conspirators influenced by Sonnō jōi rhetoric and allies from domains like Satsuma and Chōshū who later played roles in the Boshin War and the Meiji Restoration. The assassination precipitated reprisals by shogunal forces, fueled domainal tensions among Hikone Domain, Aizu Domain, and Tokugawa loyalists, and altered diplomatic postures with the United States and United Kingdom while accelerating political realignments that involved figures such as Katsura Kogorō and Okubo Toshimichi.

Legacy and historical assessment

Historians debate his role, comparing him to contemporaries like Ii Naomasa in fame and to reformers such as Tokugawa Yoshinobu and Matsudaira Sadanobu in policy intent. Some view his pro-treaty stance as pragmatic amid pressures from Western imperialism and the Industrial Revolution powers including Great Britain and France, while others criticize his authoritarian methods exemplified by the Ansei Purge. His assassination is cited alongside subsequent events like the Satsuma–Chōshū Alliance as a catalyst for the Meiji Restoration and the end of Tokugawa rule; memorials at sites including Hikone Castle and shrines in Tokyo mark contested memory among descendants and scholars such as Rokurō Taizawa and Inoue Kowashi. Modern assessments appear in studies contrasting pre-restoration diplomacy and domain politics involving Chōshū, Satsuma, Tosa and individuals like Sakamoto Ryōma and Katsu Kaishū.

Category:People of Edo-period Japan Category:Assassinated Japanese politicians