of Oda Nobunaga by
Kuniyoshi Utagawa Conflict with Asakura, Ashikaga and Azai After installing Yoshiaki as shogun, Nobunaga forced Yoshiaki to call all
daimyō to come to Kyoto and attend the court banquet.
Asakura Yoshikage, head of the
Asakura clan and regent of Ashikaga Yoshiaki, refused, which prompted Nobunaga to declare Asakura Yoshikage as a rebel.
Siege of Kanegasaki In early 1570, Nobunaga then raised an army and marched on the Asakura clan's domain in
Echizen. Oda Nobunaga was able to cause castellans of castles in Azai territory to defect, causing retreat of Azai forces. On the 23rd of July, he besieged to
Odani Castle in
Ōmi Province, but withdrew due to the difficulty of the assault on the 24th. Setting up a siege at
Yokohama castle, where his forces were approached from the rear by 8000 soldiers under the command of
Asakura Kagetake, who was then joined by
Azai Nagamasa. On the morning of the 30th of July, Nobunaga was joined by
Tokugawa Ieyasu a battle occurred on the Anegawa river, near Nomura, in which the Oda were victorious, and the Azai and Asakura clans retreated back to Odani castle. Nobunaga and Ieyasu proceeded to complete the siege of Yokohama castle, then later besieged
Sawayama Castle, erecting a long term siege fortifications. Nobunaga spared the lives of Ishiyama Hongan-ji's defenders but expelled them from Osaka and burnt the fortress to the ground. Although the Ikkō-ikki continued to make a last stand in
Kaga Province, Nobunaga's capture of Ishiyama Hongan-ji crippled them as a major military force.
Conflict with Takeda One of the strongest rulers in the anti-Nobunaga alliance was Takeda Shingen, who had formerly been an ally of the Oda clan. At the apex of the anti-Nobunaga coalition, in 1572, Takeda Shingen ordered
Akiyama Nobutomo, one of the "
Twenty-Four Generals" of Shingen, to
attack Iwamura castle. Nobunaga's aunt,
Lady Otsuya, conspiring against the Oda clan, surrendered the castle to the Takeda, and married Nobutomo. Nobunaga was shocked by Shingen's betrayal, and his rage was immense. His letter to
Uesugi Kenshin was filled with angry words, stating, "Shingen knows nothing of a samurai's honor," "This grudge will never cease," and "I will never reconcile with Shingen, now or in the future." In the same year, Shingen decided to march on Kyoto at the urging of the shogun Ashikaga Yoshiaki, starting with invading Tokugawa territory. Nobunaga, tied down on the western front, sent lackluster aid to Tokugawa Ieyasu, who suffered defeat at the
Battle of Mikatagahara in early 1573. However, after the battle, Tokugawa's forces launched night raids and convinced Takeda of an imminent counter-attack, thus saving the vulnerable Tokugawa with the bluff. This would play a pivotal role in Tokugawa's philosophy of strategic patience in his campaigns with Nobunaga. Shortly thereafter, the Takeda forces were neutralized after Shingen died in April 1573. Tokugawa Ieyasu appealed to Nobunaga for help and Nobunaga personally led an army of about 30,000 men to the relief of Nagashino Castle. The combined force of 38,000 men under Oda Nobunaga and Tokugawa Ieyasu devastated the Takeda clan at the Battle of Nagashino, the greatest defeat of the Takeda clan. Conventionally, the "Battle of Nagashino" was regarded as a historic defeat in which Takeda Katsuyori ordered his cavalry to charge recklessly into a horse guard fence where arquebusiers were waiting for them, losing many Takeda officers and soldiers. Moreover, it has been said that Nobunaga developed a new battle strategy called "three-stage shooting", in which arquebusiers were arranged in several rows with the front row firing a volley, and then making way for the second row to fire. Once the second row had fired and made way for the third row, the first row had reloaded and were ready to fire again. This way the Oda could keep a relatively steady rate of musket fire. However, this was a theory developed by the Imperial Japanese Army General Staff based on Oze Hoan's Shinchō Ki and Tōyama Nobuharu's Sōken Ki, which are war chronicles. Later, as research based on documents, letters, and Ota Gyūichi's
Shinchō Kōki progressed, many errors were pointed out. It is now believed that it was mainly the logistics in Nobunaga's hands that determined the winner.
End of Takeda clan The end of the Takeda clan came in 1582 when
Oda Nobutada and Tokugawa Ieyasu forces conquered
Shinano and
Kai Province. Takeda Katsuyori was defeated at the
Battle of Tenmokuzan and then committed suicide.
End of the Ashikaga Shogunate In early 1573, Yoshiaki initiated a siege against Nobunaga under the directive of the monk
Kennyo. Takeda Shingen and Asakura Yoshikage tried to subdue Yoshiaki. Azai Nagamasa, Matsunaga Hisahide, Sanninshu Miyoshi,
Miyoshi Yoshitsugu, and others also participated in the siege against Nobunaga. Although the siege initially cornered Nobunaga's forces, it failed, as it was interrupted by the death of Takeda Shingen. In mid 1573, when Yoshiaki began a revolt in Kyoto, he requested the help of the Matsunaga clan and allied with them. Yoshiaki and the Matsunaga clan gathered an army in Makishima castle in April and again in July which is when the revolt started. This angered Nobunaga, who invaded Kyoto. However, when Matsunaga Hisahide saw the hope for success was not achieved he returned to Nobunaga to fight the Miyoshi. Nobunaga's entry into Kyoto presented him with a situation very different from that from which he had come. Nobunaga reportedly set fire to Kyoto, which forced Yoshiaki to retreat. He focused on Ashikaga Yoshiaki, who had openly declared hostility more than once, despite the
Imperial Court's intervention. Nobunaga was able to defeat Yoshiaki's forces, and the power of the
Ashikaga was effectively destroyed on 27 August 1573, when Nobunaga drove Yoshiaki out of Kyoto and sent him into exile. Yoshiaki became a Buddhist monk, shaving his head and taking the name
Sho-san, which he later changed to
Rei-o In, bringing the Ashikaga Shogunate to an end.
Imperial Court appointments After the Ashikaga Shogunate came to end, the authority of the Imperial Court of Emperor Ōgimachi also began to weaken. This trend reversed after Oda Nobunaga entered Kyoto in a show of allegiance that indicated that the Emperor had the Oda clan's support. In 1574, Nobunaga was appointed to a rank of Lower Third Rank () of the Imperial Court and made a Court Advisor (). Court appointments would continue to be lavished on a nearly annual basis, possibly in hope of placating him. Nobunaga acquired many official titles, including Major Counselor (), General of the Right of the Imperial Army (), and Minister of the Right () in 1576.
Construction of Azuchi Castle Azuchi Castle was built from 1576 to 1579 on Mount Azuchi on the eastern shore of
Lake Biwa in
Ōmi Province. Nobunaga intentionally built Azuchi Castle close enough to Kyoto that he could watch over and guard the approaches to the capital. Azuchi Castle's location was also strategically advantageous in managing the communications and transportation routes between Nobunaga's greatest foes -
Uesugi to the north, the Takeda in the east, and the
Mōri to the west. The castle and its nearby town were depicted on the so-called
Azuchi Screens, which Oda Nobunaga gave to
Pope Gregory XIII, who displayed them in the
Vatican collections.
Conflict with the Mōri Clan The fundamental policy of the Mōri clan was "to avoid conflict with Nobunaga" and in the early 1570s, even when issues arose, they continued a cautious diplomacy to prevent any decisive confrontations. However, when Terumoto placed Ashikaga Yoshiaki under his protection, war between the two families became inevitable. The Mōri were drawn into the Ishiyama Hongan-ji War, Nobunaga's siege of a religious stronghold in Settsu, which he had begun in 1570. beginning with the
Battle of Kizugawaguchi in 1576.
Battles of Kizugawaguchi Terumoto turned to the vaunted Mōri navy. In 1576, First Battle of Kizugawaguchi Nobunaga's 'admiral', Kuki Yoshitaka, had cut the Honganji's sea-lanes and sat in blockade off the coast. Terumoto ordered his fleet, commanded by
Murakami Takeyoshi, to make for the waters off Settsu and, once there, the navy inflicted an embarrassing defeat on Kuki and opened the Honganji's supply lines. Later in 1578, at Second Battle of Kizugawaguchi, Kûki Yoshitaka defeated Takeyoshi and drove the Mōri away. Nobunaga also send
Hashiba Hideyoshi to conquer the Chūgoku region from the Mori clan. A further attempt by the Mōri to break the blockade the following year was turned back, and in 1580 the Honganji surrendered.
Conflict with Uesugi The conflict between Oda and Uesugi was precipitated by Uesugi intervention in the domain of the
Hatakeyama clan in
Noto Province, an Oda
client state. This event provoked the Uesugi incursion, a ''coup d'état'' led by the pro-Oda general
Chō Tsugutsura, who killed
Hatakeyama Yoshinori, the lord of Noto and replaced him with
Hatakeyama Yoshitaka as a puppet ruler. In response,
Uesugi Kenshin, the head of the Uesugi clan, mobilized an army and led it into Noto against Tsugutsura. Consequently, Nobunaga sent an army led by Shibata Katsuie and some of his most experienced generals to attack Kenshin. They clashed at the
Battle of Tedorigawa in Kaga Province in 1577.
Battle of Tedorigawa In November 1577, the Battle of Tedorigawa took place near the
Tedori River in Kaga Province. Kenshin tricked Nobunaga's forces into launching a frontal attack across the Tedorigawa and defeated him. Having suffered the loss of 1,000 men, the Oda forces withdrew south. The result was a decisive Uesugi victory, and Nobunaga considered ceding the northern provinces to Kenshin, but Kenshin's sudden death in early 1578 caused a succession crisis that ended the Uesugi's movement to the south. Later in 1578, after the death of Uesugi Kenshin, Nobunaga send
Shibata Katsuie,
Maeda Toshiie and
Sasa Narimasa to conquer Hokuriku region from Uesugi.
Tenshō Iga War The was two invasions of
Iga province by the Oda clan during the Sengoku period. The province was conquered by Oda Nobunaga in 1581 after an unsuccessful attempt in 1579 by his son Oda Nobukatsu. The name of the war is derived from the
era name Tenshō (1573–92), the era during which it occurred. Other names for the campaign include or . Oda Nobunaga himself toured the conquered province in early November 1581, and then withdrew his troops, placing control in Nobukatsu's hands. By the 1580s, Nobunaga was the most powerful lord in Japan, controlling 20 provinces in central Japan: Owari, Mino,
Omi, Iga,
Ise,
Yamato,
Yamashiro,
Kawachi,
Wakasa, Settsu,
Echizen,
Hida, Kaga,
Noto,
Tango,
Tanba,
Harima,
Inaba,
Tajima, and
Hōki. ==Death==