Ōmura Domain

Ōmura Domain (大村藩, Ōmura-han^?) was a Japanese domain of the Edo period. It is associated with Hizen Province in modern-day Saga Prefecture.

In the han system, Ōmura was a political and economic abstraction based on periodic cadastral surveys and projected agricultural yields. In other words, the domain was defined in terms of kokudaka, not land area. This was different from the feudalism of the West.

Ōmura was settled in ancient times, and was controlled by the Ōmura clan since the 12th century. The Ōmura clan claimed descent from Fujiwara no Sumitomo (d. 941). Ōmura Tadazumi, an 8th generation descendant from Fujiwara no Sumitomo, was the first to take the Ōmura name, from the location of his castle and estates. Among his descendants was Ōmura Sumitada (1532–1587), one of the Christian daimyo of Kyūshū. Sumitada opened the port of Nagasaki to the Portuguese and sponsored its development. Following Toyotomi Hideyoshi's campaign against the Shimazu clan, the Ōmura were confirmed in their holdings, though Nagasaki was taken from the Jesuits and made into a chokkatsu-ryō, or direct landholding, of the Toyotomi administration. His son, Ōmura Yoshiaki (1568–1615) sided with Tokugawa Ieyasu at the Battle of Sekigahara, but was forced to give up his domains to his son, Ōmura Sumiyori (d. 1619). Sumiyori had been baptized like his father and grandfather, but with the promulgation of the edicts banning Christianity, he became an apostate and persecuted the Christians in his domain. The Ōmura thus gained the trust of the Tokugawa Shogunate, and were confirmed in their holdings of 27,900 koku until the Meiji Restoration.

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