The Battle of Nagakudé was the defining exception in the Taikō’s record as a commander: his only defeat, inflicted by the only general who ever beat him, Toranaga. The battle emerged from a succession struggle after Dictator Goroda’s assassination and ended not with Toranaga’s destruction but with his army intact, his escape to his home provinces, and the Taikō-to-be’s decision to abandon the civil war. Recalled later in conversation with Hiro-matsu, Nagakudé becomes both a military reversal and a measure of the respect that shaped Toranaga’s subsequent service to the Taikō.

Causes and Stakes

The battle followed Dictator Goroda’s assassination, when General Nakamura—the future Taikō—was attempting to gather all power into his own hands. The succession was still unsettled: Toranaga supported one of Goroda’s sons, the legal heir, placing him in opposition to Nakamura’s effort to consolidate authority. The dispute therefore joined a contest over political power to a question of legitimate succession.

Nakamura’s force confronted Toranaga near the small village of Nagakudé. The evidence identifies the broad political stakes but does not describe the armies’ initial deployments or the battle’s detailed opening movements. Its account instead emphasizes the decisive reversal: Nakamura’s force was mauled and routed, while Toranaga’s position remained strong enough for him to withdraw without losing his army.

The Battle and Retreat

After Nakamura’s defeat, Toranaga retreated. A new army pursued him, now commanded for Nakamura by Hiro-matsu. Toranaga avoided the trap laid for him and escaped to his home provinces with his entire army intact, preserving the force with which he could have fought again. The account contrasts that successful withdrawal with the extraordinary scale of the fighting: fifty thousand men died at Nagakudé, very few of them Toranaga’s.

The retreat matters as much as the battlefield result. Nakamura had been routed, but Toranaga’s achievement was not simply to win an engagement; it was to evade pursuit without allowing his army to be destroyed. His force survived the battle and the attempted encirclement, leaving the conflict politically unresolved but preventing his immediate elimination. The account gives no more specific breakdown of the dead or explanation of the tactics, so Nagakudé’s military significance rests on the reported defeat, the escape, and the survival of Toranaga’s army.

The Taikō’s Decision and Toranaga’s Reputation

The Taikō-to-be called off the civil war against Toranaga, even though the account says he would have won it. Nagakudé was the only battle the Taikō ever lost; Toranaga was the only general ever to defeat him. Those paired distinctions make the battle an exceptional episode in the history of their rivalry, while the decision to stop fighting marks its immediate political consequence. The victory did not remove the Taikō’s larger power, but it demonstrated that Toranaga could defeat him and escape the consequences of a pursuing army.

Years afterward, Hiro-matsu and Toranaga revisit the outcome. Hiro-matsu says he is glad they never fought each other at Nagakudé and insists that Toranaga would have won against him. Toranaga rejects the compliment, calling the Taikō the greatest and wisest general, and Hiro-matsu answers that the only exception was Toranaga himself. Toranaga then says that Hiro-matsu is wrong and that this was why he became the Taikō’s vassal. The exchange does not erase the victory; it places it beside Toranaga’s recognition of the man he served, making the relationship between military achievement and political allegiance central to the memory of the battle.

Later Echoes: Weapons, Discipline, and War

The novel’s later attention to firearms gives Nagakudé a wider military context without establishing that guns decided the battle. Japanese warfare is described as traditionally ritualized around individual hand-to-hand combat, with the sword regarded as the most honorable weapon. Guns, despite their earlier introduction and domestic manufacture, were long treated as a novelty and considered cowardly and dishonorable under Bushido. This tension helps explain why later efforts to organize firearms into disciplined formations carry such political and cultural weight.

Yabu’s later plan for a new kind of army makes that changing military horizon concrete. After discovering five hundred muskets, twenty cannon, and abundant ammunition aboard the ship, he imagines five hundred chosen samurai trained to fight together, supporting twelve thousand conventional troops, with artillery operated by specially trained men. His proposal treats weapons, organization, and training as a combined strategy rather than as isolated equipment. It does not supply a new account of Nagakudé, but it shows how the novel frames war as a contest between inherited martial conventions and coordinated force.

That contrast is made visible in a later mock battle. Five phalanxes, each four ranks deep and containing twenty-five men, fire in successive volleys; the attackers first break and flee, then regroup in a V formation and resume firing. The demonstration uses blank ammunition, and the apparent casualties rise and stand again when the exercise ends. Its purpose is to let observers imagine what the same disciplined formations could do with real bullets. Set beside the remembered victory at Nagakudé, the rehearsal underscores the novel’s developing interest in how command, training, and battlefield organization can alter the balance of power—while leaving the earlier battle’s own methods unspecified.