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The Ômura family traced it's roots back
to the 10th Century, when Fujiwara (Ômura) Naozumi settled in Kyushu and later achieved a certain modicum of local influence.
Following the Ônin War (1467-77) the Sonogi peninsula was divided into a myriad number of petty fiefdoms and the Ômura struggled
for dominance. In 1474 the neighboring Arima dealt Ômura Sumiyoshi a defeat and afterwards exerted considerable influence
over the Ômura clan. Ômura Sumisaki adopted a son of Arima Haruzumi, an event that was to cause the adoptee in question, Sumitada,
much difficulty in his own rule. Haruzumi's natural son, Takaaki, had been disinherited in the move, and after ending up in
the Goto clan was extremely hostile towards his former family. In fact, Sumitada had to contend with the resentments of a
number of local lords, all of whom were in some way kinsmen, including Saigo Sumitaka (a brother-in-law) and Fukahori Sumikata.
In addition, the Matsuura and Arima pressed the Ômura's borders; yet the greatest threat to Sumitada was Ryûzôji Takanobu,
the most powerful daimyo in Hizen.
Faced with the seemingly inevitable fall of the Ômura, Sumitada turned to the only party that seemed capable of providing
him with telling assistance - the Jesuits. In 1562 he allowed the Christian priests to preach in his domain and gave Portuguese
traders special privileges in the port of Yokoseura; the following year Sumitada became the first Christian Daimyô, baptized
with the name Dom Bartolomeu in June. Unfortunately, Ômura's religious and political workings initially bore bitter fruit;
the same year Sumitada was baptized, Goto Takaaki rose against him and in the course of the struggle Yokoseura was destroyed.
The event seemed to presage the fall of the Ômura, and in 1566 Sumitada was forced to flee Aonogi Castle - his headquarters.
Yet the Portuguese returned and with the weapons they supplied, Sumitada was able to retake Sonogi and stabilized his position.
Ômura managed to fend off his many rivals for the next two decades and Portuguese vessels continued to call at Ômura ports.
To a greater or lesser extent the Ômura-Jesuit pact was beneficial to Sumitada, even if it provoked families already hostile
to him. In 1572 Saigo Sumitaka led a coalition of Ômura's enemies against Sumitada, a threat Sumitada countered with the help
of four Portuguese warships in 1574. From the Portuguese point of view, Sumitada's conversion was an encouraging development
but not altogether fruitful-that is, until 1580. By that year, Ryûzôji Takanobu had become the most dynamic lord of northern
Kyushu, and his advances into the Sonogi area compelled Sumitada to make a remarkable donation to the Jesuits. On 9 June he
ceded rights to the port of Nagasaki, including the transfer of all judicial authority to the Jesuits.
This dramatic move followed in the wake of two Ryûzôji incursions (1577, 78) and was not made so much to preserve the survival
of the Ômura house as to preserve the Christian presence in Hizen. Above and beyond any possible pious motivations, Sumitada
stood to gain much through continued trade with the Portuguese, especially if this were combined with an end of the war with
the Ryûzôji. Concerned that Takanobu would drive out the foreigners once the Ômura submitted, Sumitada officially 'gave' Nagasaki
to the Jesuits, maintaining the rights to collect duty tariffs on the goods that passed through the port. Later that year,
Ômura went to Saga and submitted to Ryûzôji.
Takanobu hesitated to confront the Portuguese directly, as the power of these 'Southern barbarians' was still something
of an unknown element. Just as Sumitada had hoped, Takanobu left Nagasaki alone, leaving the Jesuits to report their unexpected
boom to an amazed Rome.
Ômura was now a vassal of the Ryûzôji and finally allowed some breathing room. Takanobu turned his eye on the Arima of
the Shimabara peninsula, a clan who, like the Ômura, had turned to the foreigners for assistance. In 1584 Shimazu Yoshihisa
an expeditionary force to Shimabara to assist the reeling Arima, prompting Takanobu to personally lead an army to the area.
Sumitada was summoned to lead his own men in support, but was late in taking to the road and managed to miss the decisive
Battle of Okina wa date. Takanobu was killed during the battle and the political picture in Hizen changed drastically.
In 1587 Toyotomi Hideyoshi invaded Kyushu and the Ômura submitted, though they suffered the loss of the Nagasaki trade.
Sumitada died that same year and was succeded by his son Yoshiaki (1568-1615). Like his father, Yoshiaki was a Christian,
and in that capacity was known as Dom Sancho. Yoshiaki served in the 1592 Korean invasion, leading 1,000 men under Konishi
Yukinaga. In 1600 he elected to remain neutral during the Sekigahara campaign and as a result was ordered to retire in favor
of his son Suminobu. Although baptized in his youth, Suminobu persecuted those Christians still residing in Ômura and helped
put down the Shimabara Rebellion (1637-38). The Ômura stood as a daimyo house until the fall of the Tokugawa shogunate and
the abolishment of the han in the 19th Century.
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