The castle is associated with Tokugawa shogunate's Tairō Ii Naosuke, who favored and concluded commercial treaties with the Western powers and thus broke Japan's isolation from the world in the 19th century.
The castle is associated with Tokugawa shogunate's Tairō Ii Naosuke. Tokugawa shogunate's Tairō Ii Naosuke favored. Tokugawa shogunate's Tairō Ii Naosuke concluded commercial treaties with the Western powers. Tokugawa shogunate's Tairō Ii Naosuke thus broke Japan's isolation from the world in the 19th century.