By December 1876, Japan's samurai class had been stripped of nearly everything.

In March, the 廃刀令 (Haitō Rei) — the Sword Prohibition Edict — had banned former samurai from publicly carrying the weapons that defined them. A man whose grandfather had been a swordsman was now forbidden from walking the street as one. In August, the Meiji government commuted hereditary stipends to government bonds, collapsing the economic foundation of samurai identity in a single administrative stroke. Rice payments that had sustained samurai families across the entire Edo period were replaced with financial instruments of uncertain value. The warrior class that had survived the end of feudalism was being told to survive the end of itself.

In October, the grievances boiled over in three places at once. On October 24, roughly 200 ultra-conservative samurai under 太田黒伴雄 (Ōtaguro Tomoo) launched the 神風連の乱 (Shinpūren no Ran) in Kumamoto — attacking the Meiji garrison with swords and ancient weapons, refusing to use modern firearms on religious principle. They were crushed by the following morning; 124 were killed or committed 切腹 (seppuku). On October 26, 前原一誠 (Maebara Issei) led roughly 100 samurai in the 萩の乱 (Hagi no Ran), and on October 27 the 秋月の乱 (Akizuki no Ran) erupted. Both were suppressed within days. On December 3, the rebel leaders were executed.

With each failed uprising, angry and dispossessed former samurai moved south — toward the one place where the spirit of the old order still breathed. 薩摩 (Satsuma), modern Kagoshima prefecture, was the home domain of the 島津 (Shimazu) clan, never fully subdued by the Tokugawa. And at its center, since 1873, stood 西郷隆盛 (Saigō Takamori) — 48 years old in December 1876, born a low-ranking samurai, risen to become the military hero of the Meiji Restoration itself, then the man who had resigned from the government in fury over the Korean policy dispute, the 征韓論 (Seikanron).

Saigō had gone home to Kagoshima and built what amounted to a parallel government. His 私学校 (shigakkō) had 132 branches across the prefecture. Students combined weapons training with classical studies. Combined, they constituted an army — trained, armed, and waiting for an order that Saigō had not yet given. The Meiji government watched this and concluded, correctly, that it was a problem.

In December 1876, the government dispatched 中原尚雄 (Nakahara Hisao), a police officer, along with 57 agents into Satsuma. Their stated purpose was intelligence: to observe and report on unrest in the region. Whether they carried other instructions — including a mandate to assassinate Saigō — has never been definitively established. Nakahara later denied it. But the students of the 私学校 (shigakkō) caught them.

Under torture, Nakahara confessed. He said the agents had been sent to kill Saigō.

The confession traveled across Kagoshima like fire. The word 暗殺 (ansatsu) — assassination — whispered from student to student, from shigakkō branch to branch, gave the samurai of Satsuma exactly the pretext they had been waiting for. They did not need it to be true. It was enough that it could be true, that the government they already distrusted had sent men in secret, and that one of those men, in pain, had said the word.

Nakahara survived. He eventually recanted the confession entirely, insisting it had been extracted by force and was false. But by then it was already too late. On January 30, 1877, the Meiji government sent a warship to Kagoshima harbor to remove weapons from the local arsenal. The 私学校 (shigakkō) students read this as confirmation of aggressive intent and raided the arsenal themselves — seizing weapons the government had come to take. Within weeks, more than 1,000 students had staged further raids on naval yards.

西郷隆盛 (Saigō Takamori), reportedly reluctant, agreed to lead the uprising. He was 49 years old, and he understood, probably, that he could not win. The 西南戦争 (Seinan Sensō) — Japan's last samurai rebellion — formally began in January 1877. It cost the Meiji government ¥420,000,000, so devastating to state finances that Japan was forced off the gold standard and had to print paper currency to continue. Government dead numbered roughly 6,800. Satsuma casualties exceeded 20,000.

Saigō made his final stand at 城山 (Shiroyama) on September 24, 1877. His army had dwindled to approximately 500 men. Government forces surrounding him numbered 30,000. In the final hours, he was wounded, and he died at Shiroyama at age 49. His head was found after the battle and treated with respect.

中原尚雄 (Nakahara Hisao), whose tortured confession had lit the fuse, lived to see all of this. He had not chosen to start Japan's last samurai war. He had simply told his captors what they needed to hear, in the dark, in pain, in Kagoshima, in December 1876. The confession was almost certainly false. The war was entirely real.