Hōjō Ujiyasu

Who They Were

Hōjō Ujiyasu (北条氏康, ほうじょう うじやす) was a daimyō of the Sengoku period, the era of civil war that defined much of the Muromachi period (1336–1573). He was the third head of the Later Hōjō clan, a powerful warrior house based in the Kantō region around modern-day Tokyo. Born in 1515 at Odawara Castle, he was the son of Hōjō Ujitsuna (北条氏綱), the man who expanded the clan’s territory into Sagami and Musashi provinces.

Ujiyasu earned the epithet “Lion of Sagami” for his ferocity in battle and his reputation as a cunning strategist. He was not merely a fighter; contemporaries and later chroniclers alike described him as a ruler who combined military skill with administrative shrewdness. His only known wife was Zuikei-in, the sister of Imagawa Yoshimoto, a major daimyō of the Suruga region. That marriage tied the Hōjō into a web of alliances that shaped his entire career.

Life and Career

Ujiyasu took leadership of the Hōjō clan at a moment of acute pressure. Two of the most formidable warlords of the age, Takeda Shingen and Uesugi Kenshin, both sought to carve up Hōjō territory. Shingen, based in Kai province, and Kenshin, based in Echigo, launched repeated campaigns against Odawara. Ujiyasu’s defining achievement was breaking sieges mounted by these two rivals. He did so not through a single dramatic victory but through a combination of fortified positions, timely counterattacks, and diplomatic manoeuvring that forced both enemies to abandon their objectives.

His military record includes several named engagements. He participated in the Siege of Odawara, the Second Battle of Kōnodai, and the Battle of Fox Bridge. These battles were part of the broader struggle for control of the Kantō plain, where the Hōjō competed against the Uesugi, the Takeda, and the Satomi clans. Ujiyasu’s success in these conflicts cemented Hōjō dominance over the region for the remainder of his life.

Ujiyasu died on October 21, 1571, at Odawara Castle, the same fortress where he had been born. His death came at a time when the Hōjō were still a major power, though the balance of forces in Japan was shifting toward the great unifiers who would follow. He left behind a large family. Among his sons were Hōjō Ujimasa, who succeeded him as clan head, and Uesugi Kagetora, who was adopted into the Uesugi house as part of a peace arrangement. Other sons included Hōjō Ujiteru, Hōjō Ujikuni, Hōjō Ujinori, and Hōjō Shinkurō. His daughters married into other prominent families, including Hayakawa-dono and Nanamagari-dono, whose marriages served as political tools in the same way his own marriage had.

Why They Matter

Ujiyasu matters because he held the Later Hōjō clan together during its most dangerous years. The clan had risen quickly under his grandfather Hōjō Sōun and his father Ujitsuna, but rapid expansion invited enemies. Without Ujiyasu’s ability to withstand the combined pressure of Takeda Shingen and Uesugi Kenshin, the Hōjō would likely have been destroyed in the 1560s. Instead, he preserved the clan’s territory and passed it intact to his son Ujimasa.

His strategic approach also mattered for how warfare was conducted in the Sengoku period. Breaking a siege was not simply a matter of strength; it required intelligence, patience, and the willingness to negotiate when fighting was not advantageous. Ujiyasu’s reputation as a cunning man rested on exactly such choices. He knew when to fight and when to make peace, and that flexibility kept his enemies off balance.

The Name in Japanese

The name is 北条氏康.

• Kana reading: ほうじょう うじやす
• Romaji: Hōjō Ujiyasu

Breaking it down character by character:

• 北 (きた, kita in isolation; here read as ほう, hō): “north.” In this compound it is part of the clan name and does not carry its standalone meaning.
• 条 (じょう, jō): “article,” “clause,” or “strip.” Together with 北 it forms 北条, read Hōjō, a surname that originally referred to a place. The characters literally suggest “north strip” or “northern district.”
• 氏 (うじ, uji): “clan” or “family name.” This character is used in the given name here, not as a title. It appears in words like 氏名 (しめい, shimei), meaning “full name.”
• 康 (やす, yasu): “peace,” “ease,” or “health.” This is a common element in male given names of the warrior class, often carrying the hope of a stable and peaceful life.

So the full name reads as “Hōjō Ujiyasu,” with the family name 北条 coming first, as is standard in Japanese. The given name 氏康 combines the idea of clan identity with the wish for peace.

Legacy

Ujiyasu’s legacy is tied directly to the survival of the Later Hōjō clan. His son Ujimasa continued the family line and maintained control of Odawara for another two decades, until the clan finally fell to Toyotomi Hideyoshi in 1590. That eventual destruction should not obscure Ujiyasu’s achievement: he had kept the clan viable through the most turbulent period of the Sengoku era.

His reputation as the “Lion of Sagami” endured in later chronicles and popular culture. Samurai histories often held him up as an example of the ideal warlord—brave in battle, shrewd in counsel, and loyal to his family. His name appears in the records of the battles he fought, including the Siege of Odawara and the Second Battle of Kōnodai, and those records form part of the broader story of how the Kantō region was contested and ultimately unified.

For students of Japanese, Ujiyasu’s name is also a useful lesson in how Sengoku-era names worked. The family name 北条 links him to a specific lineage, while the given name 氏康 carries a personal meaning that would have been chosen deliberately. Understanding that structure makes it easier to read other names from the same period.