Nine days after Japan formally adopted the Gregorian calendar — nine days into the new modern order — the Meiji government issued the edict that ended the old one.

The 徴兵令 (Chōheirei), the Conscription Ordinance of January 10, 1873, declared that all male subjects would serve three years on active military duty, followed by four years in reserve. It drew on French military models. It used a French phrase. And it was that French phrase — impot du sang, the 'blood tax,' a metaphor for civic sacrifice used routinely in European political discourse — that nearly tore the country apart.

In rural Japan, literacy was limited and the new Meiji government was a distant, suspicious thing. When word of the 'blood tax' spread through farming villages in the weeks following the ordinance, the metaphor collapsed into something literal and monstrous: agents of the government were coming to drain peasants' blood. To sell it to foreigners. For medicine, or perhaps darker purposes that no one could name precisely. The panic was genuine. The response was violent.

Riots erupted across at least ten prefectures — 京都 (Kyōto), 岡山 (Okayama), 福井 (Fukui), 三重 (Mie), 鳥取 (Tottori), 広島 (Hiroshima), 島根 (Shimane), 香川 (Kagawa), 愛媛 (Ehime), and 高知 (Kōchi). This was not a local disturbance. It was a nationwide convulsion of rural rage against a government that had restructured Japanese society in five years and expected gratitude for it.

Rioters burned government offices. They smashed the new public schools that had appeared in their villages — instruments of state reach into their lives that many communities neither requested nor wanted. They attacked police stations. And in scenes that reveal how thoroughly the social order had destabilized, they also turned on 部落民 (Burakumin) communities — recently emancipated outcastes who rioters blamed, irrationally but predictably, as agents of the new order. When a world collapses, even the dispossessed find someone beneath them to punish.

The Meiji government's response was absolute. Shoot-to-kill orders were issued. Local police forces, overwhelmed, were reinforced with a force that should not have existed in this role: samurai mercenaries. The warrior class whose exclusive right to carry weapons and perform military service the 徴兵令 (Chōheirei) had just abolished were hired to crush the peasants who were protesting their replacement. The old order was deployed as a weapon against the chaos caused by its own dismantling.

The irony was not lost on the samurai themselves. The ordinance had not just transferred military service to commoners — it had stripped the samurai of the one function that defined them. Combined with the abolition of their stipends and, in 1876, the 廃刀令 (Haitōrei), the Sword Abolition Edict, the 徴兵令 (Chōheirei) completed a structural dismantling of an entire class. Many adapted: they became teachers, bureaucrats, police officers, or officers in the very conscript army that had replaced them. Some did not.

In 1877, 西郷隆盛 (Saigō Takamori) — one of the architects of the Meiji Restoration itself, now turned against it — led the 西南戦争 (Seinan Sensō), the Satsuma Rebellion, the last armed uprising of the samurai class. His force was crushed. At the Battle of 城山 (Shiroyama) on September 24, 1877, his final three hundred fighters faced thirty thousand conscript soldiers — the peasant army that January 10, 1873 had created. By morning it was over.

The 'blood tax' metaphor turned out to be more accurate than anyone intended. The blood that paid for modern Japan belonged to the people who had feared, most viscerally, that it would be taken from them.