Azuchi–Momoyama period

During the last half of the 16th century, a number of daimyōs became strong enough either to manipulate the Ashikaga shogunate to their own advantage or to overthrow it altogether. One attempt to overthrow the bakufu (the Japanese term for the shogunate) was made in 1560 by Imagawa Yoshimoto, whose march towards the capital came to an ignominious end at the hands of Oda Nobunaga in the Battle of Okehazama. In 1562, the Tokugawa clan who was adjacent to the east of Nobunaga's territory became independent of the Imagawa clan, and allied with Nobunaga. The eastern part of the territory of Nobunaga was not invaded by this alliance. Nobunaga then moved his army to the west. In 1565, an alliance of the Matsunaga and Miyoshi clans attempted a coup by assassinating Ashikaga Yoshiteru, the 13th Ashikaga shōgun. Internal squabbling, however, prevented them from acting swiftly to legitimatize their claim to power, and it was not until 1568 that they managed to install Yoshiteru's cousin, Ashikaga Yoshihide, as the next shōgun. Failure to enter Kyoto and gain recognition from the imperial court, however, had left the succession in doubt, and a group of bakufu retainers led by Hosokawa Fujitaka negotiated with Nobunaga to gain support for Yoshiteru's younger brother, Yoshiaki.

Nobunaga, who had prepared over a period of years for just such an opportunity by establishing an alliance with the Azai clan in northern Ōmi Province and then conquering the neighboring Mino Province, now marched toward Kyoto. After routing the Rokkaku clan in southern Ōmi, Nobunaga forced the Matsunaga to capitulate and the Miyoshi to withdraw to Settsu. He then entered the capital, where he successfully gained recognition from the emperor for Yoshiaki, who became the 15th and last Ashikaga shōgun.

Nobunaga had no intention, however, of serving the Muromachi bakufu, and instead now turned his attention to tightening his grip on the Kinai region. Resistance in the form of rival daimyōs, intransigent Buddhist monks, and hostile merchants was eliminated swiftly and mercilessly, and Nobunaga quickly gained a reputation as a ruthless, unrelenting adversary. In support of his political and military moves, he instituted economic reform, removing barriers to commerce by invalidating traditional monopolies held by shrines and guilds and promoting initiative by instituting free markets known as rakuichi-rakuza.

The newly installed shōgun Ashikaga Yoshiaki also was extremely wary of his powerful nominal retainer Nobunaga, and immediately began plotting against him by forming a wide alliance of nearly every daimyō adjacent to the Oda realm. This included Oda's close ally and brother in-law Azai Nagamasa, the supremely powerful Takeda Shingen, as well as the monk warriors from the Tendai Buddhists monastic center at Mount Hiei near Kyoto (who became the first major casualty of this war as it was completely destroyed by Nobunaga).

As the Oda army was bogged down by fighting on every corner, Takeda Shingen lead what was by then widely considered the most powerful army in Japan and marched towards the Oda home base of Owari, easily crushing Nobunaga's young ally and future shōgun Tokugawa Ieyasu in the Battle of Mikatagahara along the way.

However, as the Takeda army was on the cusp of obliterating the Oda–Tokugawa alliance, Takeda Shingen suddenly perished, under mysterious circumstances. (Multiple suggestions for his demise include battlefield death from marksman, ninja assassination, and stomach cancer.) Having suddenly lost their leader, the Takeda army quickly retreated back to their home base in Kai Province and Nobunaga was saved from the brink of destruction.

With the death of Takeda Shingen in early 1573, the "Anti-Oda Alliance" that Ashikaga Yoshiaki created quickly crumbled as Nobunaga in quick succession destroyed the alliance of Asakura clan and Azai clan that threatened his northern flank, and soon after expelled the shōgun himself from Kyoto.

Even after Shingen's death, there remained several daimyōs powerful enough to resist Nobunaga, but none were situated close enough to Kyoto to pose a threat politically, and it appeared that unification under the Oda banner was a matter of time.

Nobunaga's enemies were not only other daimyōs but also adherents of a Jōdo Shinshū sect of Buddhism who attended Ikkō-ikki, led by Kennyo. He endured though Nobunaga kept attacking his fortress for ten years. Nobunaga expelled Kennyo in the eleventh year, but, through a riot caused by Kennyo, Nobunaga's territory took the bulk of the damage. This long war was called Ishiyama Hongan-ji War.

Nobunaga was highly interested in foreign cultures, especially those of western Europe. A significant amount of Western Christian culture was introduced to Japan by missionaries from Europe. From this exposure, Japan received new foods, a new drawing method, astronomy, geography, medical science, and new printing techniques. Most critically, trade with Europe provided Nobunaga's armies with new weapons, among them the matchlock rifle or arquebus.

Nobunaga decided to reduce the power of the Buddhist monasteries, and gave protection to Christianity, although he never converted to Christianity himself. He slaughtered many Buddhist priests who resisted him, and burned their fortified temples.[3]

The activities of European traders and Catholic missionaries(Alessandro Valignano, Luís Fróis, Gnecchi-Soldo Organtino and many missionaries) in Japan, no less than Japanese ventures overseas, gave the period a cosmopolitan flavor.[4]

During the period from 1576 to 1579, Nobunaga constructed, on the shore of Lake Biwa at Azuchi, Azuchi Castle, a magnificent seven-story castle that was intended to serve not simply as an impregnable military fortification, but also as a sumptuous residence that would stand as a symbol of unification.

Having secured his grip on the Kinai region, Nobunaga was now powerful enough to assign his generals the task of subjugating the outlying provinces. Shibata Katsuie was given the task of conquering the Uesugi clan in Etchū, Takigawa Kazumasu confronted the Shinano Province that a son of Shingen Takeda Katsuyori governs, and Hashiba Hideyoshi was given the formidable task of facing the Mōri clan in the Chūgoku region of western Honshū.

In 1575, Nobunaga won a significant victory over the Takeda clan in the Battle of Nagashino. Despite the strong reputation of Takeda's samurai cavalry, Oda Nobunaga embraced the relatively new technology of the arquebus, and inflicted a crushing defeat. The legacy of this battle forced a complete overhaul of traditional Japanese warfare.[5]

In 1582, after a protracted campaign, Hideyoshi requested Nobunaga's help in overcoming tenacious resistance. Nobunaga, making a stop-over in Kyoto on his way west with only a small contingent of guards, was attacked by one of his own disaffected generals, Akechi Mitsuhide, and committed suicide.

Toyotomi Hideyoshi's battlefield vest

What followed was a scramble by the most powerful of Nobunaga's retainers to avenge their lord's death and thereby establish a dominant position in negotiations over the forthcoming realignment of the Oda clan. The situation became even more urgent when it was learned that Nobunaga's oldest son and heir, Nobutada, had also been killed, leaving the Oda clan with no clear successor.

Quickly negotiating a truce with the Mōri clan before they could learn of Nobunaga's death, Hideyoshi now took his troops on a forced march toward his adversary, whom he defeated at the Battle of Yamazaki less than two weeks later.

Although a commoner who had risen through the ranks from foot soldier, Hideyoshi was now in position to challenge even the most senior of the Oda clan's hereditary retainers, and proposed that Nobutada's infant son, Sanpōshi (who became Oda Hidenobu), be named heir rather than Nobunaga's adult third son, Nobutaka, whose cause had been championed by Shibata Katsuie. Having gained the support of other senior retainers, including Niwa Nagahide and Ikeda Tsuneoki, Sanpōshi was named heir and Hideyoshi appointed co-guardian.

Continued political intrigue, however, eventually led to open confrontation. After defeating Shibata at the Battle of Shizugatake in 1583 and enduring a costly but ultimately advantageous stalemate with Tokugawa Ieyasu at the Battle of Komaki and Nagakute in 1584, Hideyoshi managed to settle the question of succession for once and all, to take complete control of Kyoto, and to become the undisputed ruler of the former Oda domains. The daimyō of Shikoku Chōsokabe clan surrendered to Hideyoshi in July, 1585, and the daimyō of Kyushu Shimazu clan also surrendered two years later. He was adopted by the Fujiwara clan, given the surname Toyotomi, and granted the superlative title Kanpaku, representing civil and military control of all Japan. By the following year, he had secured alliances with three of the nine major daimyō coalitions and carried the war of unification to Shikoku and Kyūshū. In 1590, at the head of an army of 200,000, Hideyoshi defeated the Hōjō clan, his last formidable rival in eastern Honshū in the siege of Odawara. The remaining daimyō soon capitulated, and the military reunification of Japan was complete.

Hideyoshi had on his deathbed appointed a group of the most powerful lords in Japan—Tokugawa, Maeda, Ukita, Uesugi, Mōri—to govern as the Council of Five Elders until his infant son, Hideyori, came of age. An uneasy peace lasted until the death of Maeda Toshiie in 1599. Thereafter, Ishida Mitsunari accused Ieyasu of disloyalty to the Toyotomi name, precipitating a crisis that led to the Battle of Sekigahara. Generally regarded as the last major conflict of the Azuchi–Momoyama period and sengoku-jidai, Ieyasu's victory at Sekigahara marked the end of the Toyotomi reign. Three years later, Ieyasu received the title Sei-i Tai-shōgun, and established the Edo bakufu, which lasted until the Meiji Restoration in 1868.

The Momoyama period was a period of interest in the outside world, which also saw the development of large urban centers and the rise of the merchant class. The ornate castle architecture and interiors adorned with painted screens embellished with gold leaf were a reflection of a daimyō's power but also exhibited a new aesthetic sense that marked a clear departure from the somber monotones favored during the Muromachi period. A genre that emerged at this time was called the Nanban style—exotic depictions of European priests, traders, and other "southern barbarians".

The art of the tea ceremony also flourished at this time, and both Nobunaga and Hideyoshi lavished time and money on this pastime, collecting tea bowls, caddies, and other implements, sponsoring lavish social events, and patronizing acclaimed masters such as Sen no Rikyū.

Hideyoshi had occupied Nagasaki in 1587, and thereafter sought to take control of international trade and to regulate the trade associations that had contact with the outside world through this port. Although China rebuffed his efforts to secure trade concessions, Hideyoshi's commercial missions successfully called upon present-day Malaysia, the Philippines, and Thailand in red seal ships. He was also suspicious of Christianity in Japan, which he saw as potentially subversive, and some missionaries were crucified by his regime.

The contrasting personalities of the three leaders who contributed the most to Japan's final unification—Nobunaga, Hideyoshi, and Ieyasu—are encapsulated in a series of three well-known senryū that are still taught to Japanese schoolchildren:

• Nakanunara, koroshiteshimae, hototogisu. (If the cuckoo does not sing, kill it.) 「鳴かぬなら殺してしまえホトトギス」
• Nakanunara, nakasetemiyou, hototogisu. (If the cuckoo does not sing, coax it.) 「鳴かぬなら鳴かせてみようホトトギス」
• Nakanunara, nakumadematou, hototogisu. (If the cuckoo does not sing, wait for it.) 「鳴かぬなら鳴くまでまとうホトトギス」

Nobunaga, known for his ruthlessness, is the subject of the first; Hideyoshi, known for his resourcefulness, is the subject of the second; and Ieyasu, known for his perseverance, is the subject of the third verse.

• 1568: Nobunaga enters Kyoto, marking the beginning of the Azuchi–Momoyama period
• 1573: Nobunaga overthrows the Muromachi bakufu and exerts control over central Japan
• 1575: Nobunaga defeats the Takeda clan the Battle of Nagashino
• 1580: The Ikkō-ikki finally surrender their fortress of Ishiyama Hongan-ji to Nobunaga, after enduring an 11-year siege.
• 1582:
  • Incident at Honnō-ji, Nobunaga is assassinated by Akechi Mitsuhide, who is then defeated by Toyotomi Hideyoshi at the Battle of Yamazaki.
  • Hideyoshi initiated the Taikō kenchi surveys.
  • Tenshō embassy is sent by the Japanese Christian lord Ōtomo Sōrin.
• 1584: Hideyoshi fights Tokugawa Ieyasu to a standstill at the Battle of Komaki and Nagakute.
• 1586: Osaka Castle is built by Toyotomi Hideyoshi.
• 1588: Hideyoshi issues the order of Sword hunt (刀狩, katanagari).
• 1590: Hideyoshi defeats the Hōjō clan, effectively unifying Japan.
• 1591: Sen no Rikyū is forced to commit suicide by Hideyoshi.
• 1592: Hideyoshi initiates the first invasion of Korea.
• 1593: Toyotomi Hideyori is born.
• 1595: Hideyoshi orders his nephew and reigning kampaku, Toyotomi Hidetsugu, to commit seppuku.
• 1597: Second invasion of Korea.
• 1598: Hideyoshi dies.
• 1599: Maeda Toshiie dies.
• 1600: Ieyasu is victorious at the Battle of Sekigahara, marking the end of the Azuchi–Momoyama period.

• Momoyama, Japanese art in the age of grandeur. New York: The Metropolitan Museum of Art. 1975. ISBN 9780870991257.