Battle of Nagashino

What Happened

On 28 June 1575, the allied armies of Oda Nobunaga and Tokugawa Ieyasu met the forces of Takeda Katsuyori at Nagashino in Mikawa Province, in what is now Nagashino, Shinshiro, Aichi Prefecture. The allied force numbered around 38,000; the Takeda force around 15,000. The result was a crushing defeat for the Takeda clan.

The fighting began as a Takeda offensive against Nagashino Castle, which was held for the Tokugawa side. When the main allied armies arrived, the decisive engagement took place at Shitaragahara, roughly 4 km west of the castle. Takeda Katsuyori ordered his men forward against the allied line, and the assault collapsed.

Matchlock guns — tanegashima (種子島) — played a prominent part in the outcome. Yamagata Masakage, one of the most famous generals in the Takeda army, was killed by a sniper.

Background

The battle belongs to the Sengoku period (戦国時代, sengoku jidai), the century and a half of near-constant warfare among regional lords that preceded the unification of Japan. By 1575 the political landscape was dominated by Oda Nobunaga, who had entered Kyoto in 1568 and was steadily dismantling the power of rival houses. The year 1575 fell in Tenshō 3 (天正三年), the third year of the Tenshō era, within the Azuchi–Momoyama period (安土桃山時代, Azuchi–Momoyama jidai, 1573–1603).

Takeda Katsuyori had inherited the leadership of the Takeda clan from his father, Takeda Shingen. The Takeda domain lay to the east, and its mounted warriors had a formidable reputation. Nagashino Castle sat on the Tokugawa side of the frontier between the two spheres of influence, which made it a natural target for a Takeda campaign into Mikawa.

The traditional account of the battle credits the allied victory to three things: a horse defensive fence — a stockade of wooden palings — that broke up the Takeda cavalry charge; three-stage shooting, in which 3,000 guns fired in rotation in shifts of 1,000 so that reloading never halted the volleys; and Katsuyori's reckless order to charge a prepared position. Recent research has produced other explanations for the victory. What is not in dispute is that the matchlock guns did real work that day.

Why It Mattered

The destruction of the Takeda field army at Nagashino removed one of the last serious military obstacles to Oda Nobunaga's unification of Japan. After 1575, Nobunaga's supremacy looked assured, and the political consolidation that followed culminated in the Azuchi–Momoyama period.

The battle is often described as a turning point in Japanese warfare and as the first "modern" battle fought in Japan, precisely because of the arquebusiers. Whether or not that label is fair, Nagashino became the standard example in Japanese military history of massed firearms defeating a force built around cavalry.

The engagement also mattered for the men who fought in it. The allied side included figures who would shape the next generation of Japanese politics: Matsudaira Nobuyasu, Honda Tadakatsu, Akechi Mitsuhide and Gamō Ujisato. On the Takeda side, Kōsaka Masanobu was among the commanders. The deaths at Nagashino, Yamagata Masakage's among them, stripped the Takeda clan of experienced leadership it could not replace.

The Name in Japanese

The battle is written 長篠の戦い and read ながしののたたかい (Nagashino no Tatakai).

• 長 — read here as なが (naga). It means "long."
• 篠 — read here as しの (shino). It refers to a thin bamboo grass or dwarf bamboo. Together, 長篠 (Nagashino) is a place name: "long bamboo grass."
• の — read の (no). This is the possessive and linking particle, the equivalent of English "of" or "'s." It joins the place name to the noun that follows.
• 戦 — read here as たたか (tataka), from the verb 戦う (tatakau), "to fight." It means "battle" or "war."
• い — read い (i). This is the okurigana, the trailing kana that completes the verb form 戦い (tatakai), "a battle" or "a fight."

So the whole phrase parses as "the battle of Nagashino." The pattern — place name + の + 戦い — is the standard way Japanese names a battle, and it is worth recognising because it recurs constantly in Japanese historical writing.

A second name is now widely used: 長篠・設楽原の戦い (Nagashino Shitaragahara no Tatakai), "the Battle of Nagashino and Shitaragahara." The addition reflects a distinction between two places. The siege was fought over Nagashino Castle, but the decisive clash between the main armies happened at Shitaragahara, about 4 km to the west. Older usage treated the siege and the main battle as one continuous operation and named the whole thing after Nagashino, the broader district. When the emphasis falls on where the decisive fighting actually occurred, Shitaragahara is the more accurate label, and modern accounts often list both names together.

Key Figures

Oda Nobunaga — the dominant warlord of the era and commander of the allied army. Nagashino cleared a major rival from his path and made his unification of Japan appear certain.

Takeda Katsuyori — leader of the Takeda clan, who inherited the house from his father Shingen. He attacked Nagashino Castle and ordered the charge that destroyed his army.

Tokugawa Ieyasu — Nobunaga's ally, whose territory of Mikawa contained Nagashino Castle. The castle was held for his side during the siege.

Yamagata Masakage — a celebrated Takeda general, killed at Nagashino by a sniper.

Honda Tadakatsu — a Tokugawa commander present at the battle, later counted among the most renowned warriors of the age.

Matsudaira Nobuyasu — Tokugawa Ieyasu's son and heir, among the allied participants.

Akechi Mitsuhide — an Oda commander at Nagashino, later the man who turned against Nobunaga.

Gamō Ujisato — another Oda-side commander in the allied force.

Kōsaka Masanobu — a Takeda commander on the losing side.