Hōjō Ujitsuna

Who They Were

Hōjō Ujitsuna (北条氏綱, ほうじょう うじつな) was a samurai lord — a daimyo (大名, だいみょう, a territorial warlord) — who lived from 1487 to 10 August 1541. He was the second head of the Later Hōjō clan (後北条氏, ごほうじょうし), the house his father Hōjō Sōun had founded. The family is called "Later" to distinguish it from the far older Hōjō clan of the Kamakura period, an unrelated line whose prestige the new house borrowed when it took the name.

Ujitsuna inherited his father's project: the conquest of the Kantō (関東), the broad plain around present-day Tokyo. He held the office of Kantō Kanrei (関東管領), the shogunal deputy for the eastern provinces, and died at Odawara Castle (小田原城, おだわらじょう), the fortress in Sagami Province that served as his family's seat of power. His era name at birth was Chōkyō (長享, ちょうきょう), the nengo — imperial reign period — in use in 1487.

Life and Career

Ujitsuna was born in 1487, the son of Hōjō Sōun and Nan'yōin-dono. His father was a retainer of the Imagawa house who had seized Izu Province in 1493 and begun assembling a domain in the east. Ujitsuna grew up inside that project and, on his father's death in 1519, took command of it.

His career was defined by two campaigns. The first was the Siege of Edo, in which he took the castle that would one day grow into the city of Tokyo, extending Hōjō power onto the Kantō plain. The second was the First Battle of Kōnodai, fought against the Chiba clan on the Shimōsa side of the bay, which pushed his frontier eastward. He also fought at the Battle of Yamanaka. Together these engagements turned a provincial Izu domain into the dominant military power in the eastern provinces.

Ujitsuna governed from Odawara Castle, where he also died on 10 August 1541. He was married to Konoe Dono and Yōjuin-dono. Among his children were Hōjō Ujiyasu, who succeeded him as clan head, Hōjō Tamemasa, Hōjō Ujitaka, and several daughters, including Chiyo Hōjō and Sakihime.

Why They Matter

Ujitsuna is the bridge between a founder and an empire. Hōjō Sōun carved out a single province; Ujitsuna turned it into the strongest domain in the Kantō; his son Hōjō Ujiyasu held and expanded it. Without the middle generation, the Later Hōjō would have remained a footnote.

The capture of Edo Castle matters beyond the clan's own story. The site Ujitsuna took in the early sixteenth century became, within a few generations, the seat of the Tokugawa shoguns and then the capital of modern Japan. The Later Hōjō did not build Tokyo, but they were the first major warlords to make its castle a strategic prize.

Ujitsuna also represents a wider pattern of the Sengoku period (戦国時代, せんごくじだい, the "Warring States" era): the collapse of central shogunal authority and the rise of local strongmen who wrote their own rules. By claiming the Kantō Kanrei office and the Hōjō name, he wrapped raw conquest in the language of legitimate authority.

The Name in Japanese

The full name is written 北条氏綱.

• Romaji: Hōjō Ujitsuna
• Kana: ほうじょう うじつな
• Kanji breakdown:

北 (きた, kita) — "north." In the surname it is read hō, an irregular reading that only appears in this name.

条 (じょう, jō) — "article," "clause," or "line." Combined with 北 it gives 北条, Hōjō — literally "north article," a name with no ordinary meaning, which is exactly why it worked as a clan label.

氏 (うじ, uji) — "clan," "family," or "lineage." It is also the first element of many samurai given names, where it signals membership in a distinguished house.

綱 (つな, tsuna) — "rope," "cable," or "main line." In names it carries the sense of a central cord that holds things together.

Note the pattern: the 氏 in Ujitsuna's name is the same character as in his son Ujiyasu (氏康) and his grandson Ujimasa (氏政). Later Hōjō heads passed the 氏 character down the generations as a mark of succession, so a reader who recognises it can immediately place a name inside the family tree. His father Sōun, by contrast, used a different name entirely — the generational marker begins with Ujitsuna.

Legacy

Ujitsuna's most durable legacy is dynastic. He was succeeded by Hōjō Ujiyasu, under whom the Later Hōjō reached their greatest extent, ruling much of the Kantō from Odawara. The line continued until 1590, when Toyotomi Hideyoshi's siege of Odawara ended Hōjō rule and absorbed the region into a unified Japan.

His name is preserved in the record of the battles he fought: the Siege of Edo, the First Battle of Kōnodai, and the Battle of Yamanaka. These are the events by which the chronicles identify him, and they map the arc of Later Hōjō expansion under his leadership.

For students of Japanese, Ujitsuna's name is a compact lesson in how samurai naming worked — a place-derived surname, a clan character shared across generations, and a personal element that marked an individual within a lineage.