Oda Nobunaga
Oda Nobunaga (1534-1582) was a Japanese warrior chieftain who undertook th e first stage in the military unification of Japan in the later 16th century after nearly a hundred years of disorder and disunion.
Oda Nobunaga was a major daimyo during the Sengoku period of Japanese history. He was the son of Oda Nobuhide, a minor warlord with meager land holdings in Owari province. Nobunaga lived a life of continuous military conquest, eventually conquering most of Japan before his untimely death in 1582.
In 1551, Oda Nobuhide died unexpectedly, and during his funeral, Nobunaga was said to have acted outrageously, throwing the ceremonial incense at the altar. This act further alienated many Oda retainers, convincing them of Nobunaga's supposed mediocrity and lack of discipline, and they began to side with his more soft-spoken and well-mannered brother, Nobuyuki. Nobunaga was the leader of his faction of the Oda and master of Kiyosu. His principal enemy was his father's nemesis, the Imagawa.
Representative war
Dividing to Japan at Okehazama
The following year, 1560, Imagawa Yoshimoto decided to make a decisive move to the west. His aim was to drive along the Tokaido coast, brushing aside the Oda and any who did not submit to the Imagawa army with the ultimate goal of occupying Kyoto. To this end Yoshimoto gathered perhaps 20,000 to 25,000 men from Suruga, Totomi, and Mikawa in June, leaving his son Ujizane to run things while he was off conquering.
Such was the suddenness and ferocity of the attack; Imagawa assumed that a fight had broken out among his own men. His misconception was quickly righted by the appearance of Oda spearmen who succeded in taking the head of the lord of Suruga. Nobunaga's surprise attack worked beautifully, and once word spread of Yoshimoto's demise, the Imagawa army fled, utterly defeated. Matsudaira Motoyasu, resting his men in Marume, heard of the defeat and thought it best to return to Mikawa forthwith.
Nobunaga's stunning victory at Dengakuhazama (known to posterity by the name of nearby Okehazama village) changed the course of Japanese history. It had two immediate results. Firstly, it brought Oda Nobunaga national fame and removed a wolf from his back door. Secondly, it allowed Matsudaira Motoyasu to extricate himself from the Imagawa's clutches and establish Mikawa as an independent province. Both results were to have heady consequences in the years to come.
Nagashino
In this war, Nobunaga and Ieyasu (Tokugawa Ieyasu) united that they fighted for Takeda. Nobunaga gathered an army of some 30,000 men, to be commanded by some of his best commanders, including Shibata Katsuie, Hashiba Hideyoshi(Toyotomi Hideyoshi), and Takigawa Kazumasu. Tokugawa brought about 8,000 men of his own.
Nobunaga left most of his guns at home and dispensed with his palisade building. It was about 3000 guns. Nobunaga elaborated three phases of gun corps. Takeda troops were flinched and gave way by Nobunaga’s operations.
28 June 1575 was Nobunaga's greatest achievement, a victory as tactically decisive as Okehazama and ultimately of great strategic significance. The victory at Nagashino all but secured his eastern flank and allowed him to throw his weight into the siege of the Honganji and consolidate his recent gains. Takeda Katsuyori was beaten but not vanquished, and would continue to harass Tokugawa, yet, as a regional power, the Takeda were broken.
The Death of Nobunaga
As mentioned earlier, Nobunaga was said to have treated his retainers haughtily, and this seems to have been nowhere more the case than with Aketi Mitsuhide. A relatively late addition to Nobunaga's inner circle, Mitsuhide was a talented general and poet, perhaps provoking his lord's jealousy as a result of the latter. The best-known story regarding the rift between the two men and just unusual enough to be true occurred in 1577. In that year, Akechi had been tasked with subduing Tamba, and in the course of his campaign besieged the castle of the Hatano clan. Akechi succeded in securing the bloodless surrender of Hatano Hideharu and brought him before Nobunaga. To Akechi's shock, Nobunaga (for reasons unknown) ordered Hatano and his brother executed. The Hatano retainers blamed Akechi for the betrayal and in revenge kidnapped and brutally murdered Akechi's mother.
Nobunaga returned from his conquest of the Takeda clan in time for news of a crisis in the west. He awoke the following morning in the Honnoji to find that during the night Akechi Mitsuhide had the temple surrounded. Raising an army on the pretext of going to Hideyoshi's aid, Mitsuhide had taken a detour into Kyôto and now called for Nobunaga's head. As Nobunaga had only a small personal guard in attendance on the morning of 21 June, the outcome was a forgone conclusion, and he died, either in the blaze that was started in the course of the fighting or by his own hand. Soon afterwards, Oda Hidetada was surrounded at Nijo and killed. 11 days after that, Akechi Mitsuhide would himself be killed, defeated by Hideyoshi at the Battle of Yamazaki.
Reference
http://www.samurai-archives.com/nobunaga.html#1
http://www.answers.com/topic/nobunaga
http://www.wsu.edu:8080/~dee/TOKJAPAN/ODA.HTM
Posted by Kineo Motoki