Tokugawa Ieyoshi

…two leaders, Toyotomi Hideyoshi and Tokugawa Ieyasu, in their campaigns to dominate Japan.

…was the chief adviser to Tokugawa Ieyoshi (reigned 1837–53), 12th Tokugawa shogun, or military dictator, of Japan. Mizuno was responsible for the Tempō reforms, the Tokugawa shogunate’s final effort to halt the growing social and economic decline that was undermining its rule.