Born into the prestigious Sanjo house among Kyoto’s kuge aristocracy, he was raised within the etiquette and politics of the Imperial Court. His early environment linked him to Emperor Komei’s circle as Japan faced foreign pressure and internal unrest.

As a teenager he began formal service in the Imperial Court, learning ceremony, poetry, and bureaucratic procedure under senior courtiers. These skills later let him translate court authority into workable political leadership during the Restoration upheaval.

He aligned with anti-treaty court opinion after the Tokugawa bakufu signed the Ansei Treaties without imperial approval. In Kyoto he supported the sonnō jōi current, arguing that diplomacy must be grounded in imperial legitimacy and national unity.

He cultivated links with activists and domain leaders seeking to empower the throne, including figures connected to Satsuma and Choshu politics. These contacts helped the court become a real political actor rather than a purely ceremonial institution.

After the 1863 political upheaval in Kyoto, he was pushed out of the capital as the balance between court factions and the bakufu shifted. He fled to avoid arrest, leaving behind influence at court while remaining a symbol of imperial loyalist resolve.

Living under Choshu’s protection, he witnessed the domain’s confrontation with the Tokugawa government intensify after incidents like the Kinmon events. His presence gave Restoration leaders a courtly bridge to imperial authority when legitimacy mattered most.

As Tokugawa power waned and the young Emperor Meiji became the focus of a new political coalition, he was able to return to active court politics. He worked alongside senior courtiers such as Iwakura Tomomi to prepare institutional change.

With the Restoration government proclaimed, he took high office in the emerging state and helped present imperial rule as both traditional and reformist. His court standing complemented leaders like Okubo Toshimichi, who needed legitimacy for rapid policy shifts.

As the government consolidated, he followed the court’s move from Kyoto to the new seat of power in Tokyo. The relocation signaled a break from old Tokugawa geography while keeping the imperial institution at the center of national administration.

He became Daijo-daijin, the highest post in the revived Daijo-kan system, acting as a senior coordinator of ministers and court officials. The role required him to manage competing domain leaders while preserving the dignity and primacy of the emperor.

During the decisive reforms of 1871, he backed the replacement of han domains with centrally administered prefectures to strengthen national governance. Working with leaders such as Okubo Toshimichi, he helped frame the change as an imperial act of unification.

When debate erupted over a proposed expedition to Korea, he helped manage elite conflict as figures like Saigo Takamori resigned from government. His priority was keeping the state stable and the emperor above factional struggles in a volatile moment.

As the government experimented with councils and advisory bodies, he supported steps that brought consultation into policymaking without undermining imperial authority. These efforts helped transition rule from personal alliances toward durable institutions in Tokyo’s new bureaucracy.

When the modern cabinet system replaced the old Daijo-kan structure, he adjusted from classical offices to new constitutional-era arrangements. He remained a respected elder whose courtly prestige helped legitimize executive reforms associated with Ito Hirobumi.

With the Meiji Constitution promulgated, he continued as a high-ranking counselor identified with the Restoration’s original court coalition. His presence symbolized continuity between the ancient throne and the modern state apparatus forming around parliament and cabinet.

He lived to see Japan’s first Imperial Diet convene, a milestone blending constitutional forms with imperial sovereignty. The moment reflected decades of compromises he had helped broker between court tradition, domain power, and modern bureaucratic governance.

He died after a long career spanning the fall of the Tokugawa order and the consolidation of Meiji institutions. Remembered as a principled court noble, he helped convert imperial legitimacy into practical governance during Japan’s most consequential political transition.