Sengoku Period Timeline

(1467 - 1615)

The Sengoku Period, or 'Age of Warring States,' was a century-long era of nearly constant civil war, social upheaval, and political intrigue in Japan. Beginning with the collapse of the Ashikaga shogunate's authority after the Onin War, it saw powerful regional lords (daimyo) battle for dominance until three successive leaders—Oda Nobunaga, Toyotomi Hideyoshi, and Tokugawa Ieyasu—unified the country. More Less

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Battles and Conflicts

Outbreak of the Onin War

1467 - 1477

The Onin War erupted in Kyoto between the Hosokawa and Yamana clans over a shogunal succession dispute. A decade of fighting devastated the capital, destroyed the authority of the Ashikaga shogunate, and ushered in a century of civil war among provincial daimyo, marking the traditional beginning of the Sengoku period.

Image source: Ōnin War

Collapse of Ashikaga shogunal authority

1493

The Meiō Coup of 1493 saw Hosokawa Masamoto depose shogun Ashikaga Yoshiki and install his own candidate. The shogunate became a puppet institution controlled by the Hosokawa clan, effectively ending central governance and confirming that real power lay with regional warlords.

Image source: Meiō incident

Hōjō clan seizes Izu province

1493 - 1495

Ise Shinkuro, later known as Hōjō Sōun, seized Izu Province around 1493–1495 and then captured Odawara Castle in 1495, establishing the Late Hōjō clan as one of the first great Sengoku daimyo and setting a model for upstart warlords rising from below.

Image source: Later Hōjō clan

Takeda Shingen captures Shinano province

1553 - 1561

Takeda Shingen expanded from Kai into Shinano, clashing repeatedly with Uesugi Kenshin of Echigo. Their five Battles of Kawanakajima, culminating in the bloody fourth battle of 1561, became legendary examples of Sengoku generalship and left both rivals' positions largely unchanged.

Image source: Battles of Kawanakajima

Uesugi Kenshin's campaign in Kantō

1560 - 1561

Uesugi Kenshin led a massive army into the Kantō region, besieging the Hōjō stronghold at Odawara in 1561 and receiving formal recognition as Kantō Kanrei. Though he could not hold the region, the campaign demonstrated his military prowess and earned him fame as a peerless commander.

Image source: Siege of Odawara (1561)

Battle of Nagashino

Jun 28, 1575

Oda-Tokugawa forces under Nobunaga and Ieyasu crushed Takeda Katsuyori's cavalry at Nagashino. Volley fire from thousands of arquebusiers behind wooden palisades decimated the famed Takeda horsemen, demonstrating the decisive power of massed firearms and breaking Takeda hegemony in eastern Japan.

Image source: Battle of Nagashino

Fall of the Takeda clan

Mar 1582

Nobunaga and Tokugawa Ieyasu launched a final invasion of the Takeda lands in Kai and Shinano. Abandoned by his retainers, Takeda Katsuyori committed suicide at Temmokuzan, extinguishing the great Takeda clan and opening the east to Oda control.

Image source: Battle of Tenmokuzan

Culture and Society

Introduction of Portuguese firearms to Japan

1543

Portuguese traders landed on Tanegashima island and introduced matchlock arquebuses to Japan. Japanese smiths quickly copied the weapons, revolutionizing warfare. Firearms would prove decisive at battles such as Nagashino and transformed the tactics of samurai armies across the country.

Image source: Tanegashima (gun)

Arrival of Francis Xavier and spread of Christianity

Aug 15, 1549

Jesuit missionary Francis Xavier arrived at Kagoshima in 1549, beginning the Christian mission in Japan. Some Sengoku daimyo, seeking trade with the Portuguese and favor with missionaries, converted to Christianity, making Kirishitan communities a notable feature of the era.

Image source: Francis Xavier

Rise of Oda Nobunaga

Oda Nobunaga succeeds to headship of the Oda clan

1551

Following the sudden death of his father Oda Nobuhide, the eccentric young Nobunaga took leadership of the Oda clan of Owari Province despite internal opposition. He consolidated power by defeating rivals within his own family and domain, laying the groundwork for his later conquests.

Image source: Oda Nobunaga

Oda Nobunaga succeeds to headship of the Oda clan

Battle of Okehazama

Jun 12, 1560

With a vastly outnumbered force of roughly 2,000–3,000 men, Oda Nobunaga surprised and routed Imagawa Yoshimoto's army of some 25,000 at Dengakuhazama near Okehazama. Yoshimoto was killed, the Imagawa clan collapsed, and Nobunaga's reputation soared, launching his drive toward national dominance.

Image source: Battle of Okehazama

Alliance between Oda Nobunaga and Tokugawa Ieyasu

1561

Matsudaira Motoyasu (later Tokugawa Ieyasu), newly independent from the Imagawa, signed a defensive pact with Nobunaga. This enduring alliance anchored both lords' eastern flank for two decades, allowing Nobunaga to focus on western campaigns while Ieyasu secured Mikawa and Tōtōmi provinces.

Image source: Takeda Shingen

Nobunaga enters Kyoto with Ashikaga Yoshiaki

Sep 1568

Oda Nobunaga marched on the capital and installed Ashikaga Yoshiaki as the fifteenth shogun, restoring nominal Ashikaga rule after years of chaos. In practice, Nobunaga dominated the shogunate, using Yoshiaki's legitimacy to advance his own unification campaigns from his new base in Kyoto.

Image source: Siege of Fushimi Castle

Nobunaga besieges Mount Hiei and destroys Enryaku-ji

Sep 30, 1571

Angered by the militant monks of Enryaku-ji on Mount Hiei, who had supported his enemies, Nobunaga surrounded the sacred complex and burned it, killing thousands of monks, women, and children. The brutal destruction broke armed Buddhist resistance in the capital region and shocked contemporaries.

Image source: Siege of Mount Hiei

Construction of Azuchi Castle begins

1576 - 1579

Nobunaga began building Azuchi Castle on Lake Biwa, completed in 1579. Its towering multi-story tenshu combined fortress and palace functions, symbolizing his authority and inaugurating the lavish Azuchi-Momoyama style of castle architecture emulated by subsequent warlords.

Image source: Azuchi Castle

Honno-ji Incident: assassination of Oda Nobunaga

Jun 21, 1582

While lodging at Honnō-ji temple in Kyoto en route to support a campaign against the Mōri, Oda Nobunaga was betrayed and attacked by his general Akechi Mitsuhide. With escape impossible, Nobunaga died in the burning temple, cutting short the career of Japan's most ambitious unifier.

Image source: Honnō-ji Incident

Toyotomi Unification

Taiko land surveys conducted nationwide

1582 - 1598

Hideyoshi commissioned comprehensive cadastral surveys of rice productivity across Japan, standardizing measurements and registering cultivators. The Taiko kenchi rationalized taxation, undermined local intermediaries, and created the fiscal foundation of the Toyotomi regime.

Image source: Azuchi–Momoyama period

Battle of Yamazaki

Jul 2, 1582

Toyotomi Hideyoshi raced back from the Mōri front and defeated Akechi Mitsuhide at Yamazaki just days after Nobunaga's death. Mitsuhide fled and was killed shortly after; Hideyoshi thereby claimed the mantle of avenger and positioned himself as Nobunaga's political heir.

Image source: Battle of Yamazaki

Construction of Osaka Castle begins

1583 - 1597

Hideyoshi began constructing a colossal new headquarters at Osaka on the site of Ishiyama Hongan-ji. With its massive stone walls and gilded interiors, Osaka Castle served as the political center of Hideyoshi's regime and showcased the opulence of Momoyama culture.

Image source: Osaka Castle

Battle of Shizugatake

Apr 1583

Hideyoshi defeated Shibata Katsuie, Nobunaga's senior lieutenant, at Shizugatake in Ōmi Province. Katsuie's death removed the last major obstacle to Hideyoshi's succession within the Oda camp, cementing Hideyoshi's supremacy over Nobunaga's former domains.

Image source: Battle of Shizugatake

Komaki and Nagakute campaign against Tokugawa Ieyasu

Mar 1584 - Nov 1584

Hideyoshi clashed with Tokugawa Ieyasu and Oda Nobukatsu in Owari. After indecisive fighting at Komaki and Nagakute, Hideyoshi negotiated peace, securing Ieyasu's nominal submission and consolidating control over central Japan without a final battle.

Image source: Battle of Komaki and Nagakute

Sieges of Toyama and Battle of the Uchidehama

1585

Hideyoshi led a large army against Sassa Narimasa in Etchū Province, forcing his surrender, then defeated Chōsokabe Motochika in Shikoku. These rapid victories extended Hideyoshi's authority across much of western and central Japan and prompted Emperor Ōgimachi to appoint him Kanpaku (regent).

Image source: Siege of Toyama

Invasion and pacification of Kyushu

1587

Hideyoshi led an enormous army onto Kyushu Island, forcing the Shimazu clan to submit after their bid to dominate the island failed. The conquest brought all of Kyushu under Toyotomi control and was followed by an edict expelling Christian missionaries from Japan.

Image source: Kyūshū campaign

Sword Hunt edict issued

1588

Hideyoshi ordered the collection of all swords and weapons from peasants throughout Japan, ostensibly for use in building a giant Buddha statue. The policy disarmed the countryside, fixed the social order separating warriors from farmers, and strengthened the monopoly on violence held by the warrior class.

Siege of Odawara ends Hōjō power

May 1590 - Aug 1590

Hideyoshi mobilized perhaps 200,000 troops against the Late Hōjō clan's fortress at Odawara. After a bloodless three-month siege, the Hōjō surrendered, completing Hideyoshi's conquest of Japan and marking the conventional end of the Sengoku period's warring-states phase.

Image source: Siege of Odawara (1590)

First invasion of Korea begins

May 23, 1592

Seeking conquest beyond Japan, Hideyoshi launched an invasion of Joseon Korea with roughly 160,000 troops. Initial advances reached Pyongyang, but Korean naval victories under Admiral Yi Sun-sin and Chinese intervention stalled the campaign, beginning a ruinous seven-year war.

Image source: Japanese invasions of Korea (1592–1598)

Death of Toyotomi Hideyoshi

Sep 18, 1598

Hideyoshi died at Fushimi Castle at age 61, having established a Council of Five Elders to govern until his young son Hideyori came of age. His death ended the Korean invasion plans and destabilized the balance of power, opening the path to Tokugawa supremacy.

Image source: Toyotomi Hideyoshi

Tokugawa Consolidation

Tokugawa Ieyasu relocated to the Kantō region

1590

After Odawara fell, Hideyoshi transferred Ieyasu from his ancestral lands to the eight provinces of the Kantō, centered on Edo. Though seemingly exile, the move gave Ieyasu vast, contiguous territories that he developed into the power base from which he would eventually rule Japan.

Image source: Tokugawa Ieyasu

Battle of Sekigahara

Oct 21, 1600

The largest battle in Japanese history pitted Tokugawa Ieyasu's Eastern Army against Ishida Mitsunari's Western Army loyal to the Toyotomi. A defection mid-battle turned the tide, giving Ieyasu a decisive victory that made him master of Japan and doomed the Toyotomi cause.

Image source: Battle of Sekigahara

Tokugawa Ieyasu establishes the Tokugawa shogunate

Mar 24, 1603

Emperor Go-Yōzei appointed Ieyasu as shogun, founding the Tokugawa bakufu based in Edo. The establishment of the shogunate formally ended the era of warring states and began over two and a half centuries of Tokugawa peace known as the Edo period.

Image source: Tokugawa shogunate

Siege of Osaka destroys the Toyotomi clan

Nov 1614 - Jun 1615

Concerned by the surviving Toyotomi threat centered on Hideyori at Osaka Castle, Ieyasu attacked in winter 1614 and again in summer 1615. The fall of Osaka and death of Hideyori eliminated the last major rival to Tokugawa rule, securing unification permanently.

Image source: Siege of Osaka

Siege of Osaka destroys the Toyotomi clan

Key Facts

The Sengoku Period began with the Onin War (1467-1477), which devastated Kyoto and destroyed the authority of the Ashikaga shogunate.
Powerful regional military lords known as daimyo replaced central government control, building castles and fielding armies of samurai and ashigaru foot soldiers.
European contact began during this era when Portuguese traders and Jesuit missionaries arrived in 1543, introducing firearms (arquebuses) that transformed Japanese warfare.
Oda Nobunaga initiated the reunification of Japan with victories at battles like Okehazama (1560) and Nagashino (1575), but was betrayed and killed in 1582.
The period ended in 1615 after Tokugawa Ieyasu's decisive victory at the Siege of Osaka, leading to over two centuries of peace under the Tokugawa shogunate.

Source

This Sengoku Period timeline was generated with the help of AI, using information found on the internet.

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