was a class of powerful magnates or daimyō (大名) considered to be outsiders by the ruler of Japan. Tozama daimyō were classified in the Tokugawa shogunate (江戸幕府) as daimyō who became hereditary vassals of the Tokugawa after the Battle of Sekigahara (関ヶ原の戦い). Tozama daimyō were discriminated against by the Tokugawa and opposed to the fudai daimyō during the Edo period (江戸時代). Origins Originally, the concept of tozama daimyō emerged in Japan along with the daimyō after the rise of the Kamakura shogunate (鎌倉幕府) in the 12th century. Tozama applied to a daimyō who was considered an "outsider" by successive Shōguns, Emperors, and shikkens (執権) that ruled over Japan at any given time. Typically, a tozama had a loose or indirect relationship with the current ruler, and this definition remained intact during the subsequent Ashikaga shogunate (足利幕府, 1336–1573, also known as the Muromachi (室町幕府)), and the Sengoku period (戦国時代, 1467–1615, "Age of Warring States"). Edo period The establishment of the Tokugawa shogunate in 1600 redefined tozama daimyō as the daimyō who submitted as vassals to the Tokugawa only after the decisive Battle of Sekigahara, including those who fought for the Tokugawa at the battle but were not official vassals. Tokugawa Ieyasu had treated the great tozama amicably, but his grandson Tokugawa Iemitsu was less tolerant of them during his rule between 1623 and 1626. Tozama and their descendants were distrusted and the Tokugawa discriminated against them in favor of the fudai daimyō. Tozama were largely excluded from the shogunate government, the Bakufu, and their numbers were limited compared to the fudai who filled the administration's ranks. Many of the largest and wealthiest han—the personal feudal domains of the daimyō—were ruled by tozama, including the Maeda clan of the Kaga Domain with a value of 1,000,000 koku under the Kokudaka system. However, this was a deliberate Tokugawa plan to keep the tozama in check, as fudai daimyō were stationed in smaller domains in strategic locations, including along major roads and near important cities. Many notable tozama families, including the Shimazu, the Mori, the Date, the Hachisuka, and the Uesugi, were based in western and northern Honshu, in contrast to the Tokugawa based in the eastern city of Edo. Most, but not all, of these families had been living in roughly the same regions for centuries before the Tokugawa shogunate. Tozama daimyō heavily profited from trade in the 17th century, particularly in western