Tokugawa Iemochi (July 17; 1846-August 29; 1866) was the 14th shogun of the Tokugawa shogunate of Japan; who held office 1858 to 1866. During his reign there was much internal turmoil as a result of Japan's first major contact with the United States; which occurred under Commodore Perry in 1853 and 1854; and of the subsequent 're-opening' of Japan to western nations. Iemochi's reign also saw a weakening of the shogunate.