The Tenpō Famine — The Greatest Subsistence Crisis in Japanese History and the Peasant Rebellions It Spawned

The Tenpō Famine (Tenpō no Kikin), which raged from 1833 to 1838, was the greatest subsistence crisis of the early modern period to strike all of Japan. Grain production plummeted due to successive crop failures caused by climate cooling, and in particular the Tohoku region experienced near-total rice failures. A population loss of approximately 1.25 million was recorded nationwide, and in Edo itself, 150 to 200 people died of starvation daily. Through the chain reactions of increased deaths from hunger, soaring prices, and spreading social unrest, the famine brought turmoil to the very governance system of the Edo shogunate. This was not merely a natural disaster but a grave event symbolizing the structural crisis in Japanese society moving toward the late Edo period.

**The Causes and Spread of the Famine**

In Tenpō 4 (1833), the Japanese islands were struck by an abnormal cooling. Beyond the low level of solar activity, the Cosigüina volcano in Nicaragua, far across the Pacific, erupted violently in January 1835 (Tenpō 6), sending ash into the stratosphere and creating a global umbrella effect. This planetary-scale meteorological anomaly lowered temperatures across Japan, and the cold damage across northern Japan grew severe.

From Tenpō 5 (1834) through Tenpō 7 (1836), cold summers and heavy rains struck year after year. Grain crops, above all rice, continued to deteriorate, and across the vast expanses from Hokuriku into Tohoku, the situation arose in which no rice was produced at all. Through these successive crop failures, farmers' stored grain reserves were depleted, and food scarcity began.

The famine's damage was most severe in the Tohoku region. The devastation in the northeastern prefectures—Aomori, Iwate, Akita—was catastrophic, with some villages losing 30 to 50 percent of their populations to excess mortality. The damage in the south-central Tohoku region (Fukushima, etc.) was also immense, and the famine's effects rippled to other regions as well.

**The Famine's Social Impact: Starving in Edo**

The famine was not confined to the countryside; it eventually brought severe impact to the cities. The acute shortage of foodstuffs caused grain prices to soar. From Tenpō 7 (1836) through Tenpō 8 (1837), rice prices on the Edo market leapt to two to three times their normal levels. As a result, the urban underclass—day laborers, shop workers, women, and children—went hungry, and many fell into malnutrition.

According to records of the Edo town magistrate office, in the winter of Tenpō 8 (1837), more than 150 to 200 people died of starvation daily in the streets of Edo. This figure meant that hunger and death were rife not just in some distant corner but even around Edo Castle, in the shogun's own backyard. The Edo town magistrate's office, to ease the desperate situation, established 21 relief shelters (kyūkoya) and distributed food on a temporary basis, but the scale fell far short of demand.

The unemployment and destitution caused by the famine were transformed into social unrest. Popular resentment grew toward merchants who speculated by riding the rising rice market and the rich traders who were buying up supplies. At the same time, the voice of complaint grew against the slowness and inadequacy of the shogunate's response, leading eventually to direct rebellion.

**The Ōshio Rebellion and the Succession of Peasant Uprisings**

At the height of social chaos caused by the famine, in February of Tenpō 8 (1837), a rebellion broke out led by Ōshio Heihachirō, a former town magistrate. Grounded in Wang Yangming school thought, Ōshio championed the "salvation of the people of the realm" and, gathering a mixed force of samurai, rōnin, peasants, and townspeople, attacked the streets of Osaka. The Ōshio Rebellion dealt a great blow to the shogunate's prestige; the fact that a man who had held the office of magistrate could raise the banner of rebellion against the shogunate demonstrated fundamental distrust in the shogunate's very system of rule.

Immediately after the Ōshio Rebellion, peasant uprisings broke out in succession across the land. In Tenpō 7 (1836), a large-scale uprising known as the Tenpō Disturbance erupted throughout Kai Province. Elsewhere, in regions like Shinshū and Jōshū, peasants rose up en masse, setting fire to the mansions of wealthy merchants engaged in hoarding rice and engaging in other destructive acts.

What was common to all these uprisings and riots was that the common people, facing the crisis of survival caused by the famine, directed their wrath toward the rich and the shogunate's system of rule itself. Earlier uprisings had typically sought reductions in tax obligations, but in the Tenpō famine, distrust of and opposition to the social system itself became manifest.

**The Shogunate's Response and the Crisis of Governance**

Faced with the famine, the shogunate elevated Mizuno Tadakuni to the post of chief senior councilor and pursued the Tenpō Reforms. These reforms followed in the track of Matsudaira Sadanobu's Kansei Reforms, policies of austerity aimed at prohibiting luxury and strengthening controlled economics. Yet the policies the shogunate adopted were incapable of addressing the structural crisis that the famine represented.

In reality, the shogunate delegated regional famine relief to the domains and lacked a unified response from the central government. Moreover, shogunal finances were severely strained, and it had no resources to undertake large-scale relief projects. In Tenpō 11 (1840), news of the Opium War reached Japan, and the possibility of conflict with foreign powers became a reality. To deal with this external crisis, the shogunate was compelled to direct yet more of its finances toward military spending, relegating domestic famine relief even further down the agenda.

**Historical Significance: Prelude to the Late Edo Period**

The Tenpō Famine demonstrates that at the turn from the eighteenth to the nineteenth century, structural contradictions in Japanese society became manifest. The Edo period had been characterized as an age of peace, yet beneath that surface, fundamental problems had accumulated: the economic destitution of the countryside, the growth of urban poverty, and the deterioration of shogunal finances. The Tenpō Famine brought all these latent crises suddenly into the open.

Most importantly, it was in the wake of this famine that social trust in the shogunate suffered a dramatic collapse. Just before the famine, in Tenpō 12 (1841), the American Black Ships—a fleet commanded by Perry—arrived and demanded the opening of Japan. The shogunate, overwhelmed by dealing with this foreign confrontation, found itself even more unable to address domestic social problems.

About twenty years after the Tenpō Famine, in Keio 3 (1867), the Edo shogunate came to an end through the return of power to the emperor. In the long process of the shogunate's ultimate decline, the Tenpō Famine was a symbolic turning point. The crisis of governance exposed by the famine ultimately led to catastrophic collapse in the tumultuous events of the late Edo period.