Major conflict1467 – 1615 · 148 years
Sengoku Period - Warring States Japan
Japan · Honshu · Kyoto
Japanese feudal lords (daimyo) waged unceasing warfare, creating a martial culture that unified the nation.
Estimated casualties
100K – 500Kestimated dead
HEADLINE500K — the single figure used on the map
1467-1615 CE; overlaps with Sengoku Period
SOURCEJapanese sources; Clodfelter
What happened
The Sengoku Period (1467-1615) saw Japan fragment into competing domains ruled by daimyo. The period began with the Onin War (1467-1477), which destroyed the Ashikaga shogunate's authority. Thereafter, daimyo fought constantly for territorial expansion and supremacy. Key military innovations included the adoption of firearms (introduced 1543) and changes in castle architecture to resist cannon fire. Three powerful daimyo eventually emerged: Oda Nobunaga (conquered much of central Japan), Toyotomi Hideyoshi (completed unification), and Tokugawa Ieyasu (established a stable shogunate). The period's warfare was characterized by large armies, complex logistics, and tactical innovation.
Why it mattered
The Sengoku wars unified Japan politically and militarily under the Tokugawa Shogunate, ushering in 250 years of stability. The period elevated the samurai class to dominance and established bushido (the warrior code). The period's military innovations influenced East Asian warfare. The unification created the conditions for Japan's rapid modernization in the 19th century and its emergence as a major Asian power.
Belligerents4
- Japanese daimyo
- Oda clan
- Toyotomi clan
- Tokugawa clan
Sources
- Wikipedia: Sengoku Period - Warring States Japan
- Clodfelter, Warfare and Armed Conflicts (4th ed., 2017)
- Wikipedia — text reused under CC BY-SA 4.0
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Cite as: Sengoku Period - Warring States Japan (1467 – 1615). War Atlas. https://waratlas.org/c/sengoku-period-japan · Sources & methodology