Hōjō clan: Kantō rulers, Odawara, and siege of 1590

Search “Hōjō” and you get Kamakura regents or a Sengoku castle family—different houses, same kanji trap. This article is the Late Hōjō (Go-Hōjō) clan: Hōjō Sōun from rōnin to Kantō boss, Odawara walls, fights with Takeda and Uesugi, and the Hideyoshi coalition siege of 1590. Read samurai clans for house vocabulary first.

Name confusion: which Hōjō?

Kamakura Hōjō were regents (1200s–1333) ruling in shogun’s name—different century. Go-Hōjō (“later Hōjō”) began in the 1400s–1500s with Sōun. When sources say “Hōjō clan Sengoku,” they mean Go-Hōjō unless stated otherwise.

Five generations table

Ujiyasu’s era (third head) is peak—defeated or survived combined Uesugi-Takeda pressure in famous campaigns. Laws (Go-Hōjō bunkokuhō provincial codes) organized Kantō villages—early modern governance branding.

Odawara and Kantō control

Odawara Castle sat on coast routes—stone upgrades, wide baileys, long sieges possible. Kantō plain rice fed huge armies; Hōjō networked smaller lords into gōshi style allies. Navy and pirates on nearby seas linked to naval warfare themes.

• Suruga invasion—clashed with Takeda over Izu/Suruga borders.
• Nobunaga era—uneasy truces; Hōjō avoided total submission until Hideyoshi.
• Triple alliance stories—Takeda, Hōjō, Imagawa once cooperated—fragile eastern triangle.

1590 siege and clan end

Odawara siege (1590): Hideyoshi gathered a massive coalition—Tokugawa attacked as vanguard. Months of encirclement, starvation, and psychological warfare; Ujinao surrendered. Hōjō lands went largely to Tokugawa—directly setting up Edo shogunate geography. See siege warfare for tactics (earthworks, naval blockade).

Mon and culture

Hōjō used distinctive mon (three scales, wave patterns in some branches—verify museum pieces). Odawara festivals and castle parks today teach the clan story to tourists—separate theme park drama from academic dates.

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