Japanese statesman who negotiated the commercial treaty that established trade between the United States and Japan, thus opening that country to commerce with the outside world for the first time in two centuries.

A prominent feudal lord who had studied Western languages and military techniques, Hotta proposed that the government pursue a course of moderation in dealing with Commodore Matthew C. Perry of the United States, who had arrived in 1853 with a fleet of warships to demand that Japan open itself to relations with the West. After the government defied public sentiment and signed a treaty that permitted an American consul to reside in Japan, the position of the shogun (hereditary military dictator of Japan) deteriorated. In the midst of this crisis, Hotta was appointed head of the rōjū (senior councillors), and, to consolidate his rule, he reduced the power of those who were violently opposed to the new foreign policy. For support in his decision to sign a commercial treaty with the United States, he turned to the great feudal lords, who had heretofore been excluded from government. The storm of criticism that followed caused him to consult with the emperor, whose predecessors for several centuries had exercised no more than a ceremonial function in the government. The emperor's refusal to sign the treaty further weakened the government, and the shogun dismissed Hotta from office. Although the shogunate was temporarily able to reassert its leadership, Hotta's actions helped kindle the movement that restored power to the emperor and toppled the Tokugawa shogunate in 1868.