Sakoku (Seclusion Policy)

The Sakoku, or Seclusion Policy, was the Tokugawa Shogunate's systematic closure of Japan to nearly all foreign contact and trade, a regime that reached its full severity in the decades after the Shimabara Rebellion. In Silence, this policy is not merely a backdrop but the active, crushing mechanism that determines the fate of every Christian, missionary, and apostate. It is the legal and institutional expression of the "swamp of Japan" that the novel's characters struggle against—a deliberate, state-engineered isolation designed to extinguish Christianity by cutting off its foreign roots and subjecting its adherents to relentless surveillance, torture, and the ultimate choice between apostasy and death.

Origins and Enforcement

The seclusion policy was the culmination of a long process. As early as 1614, the Edict of Expulsion was promulgated, declaring that the "Kirishitan band" sought to "change the government of the country, and obtain possession of the land," and ordering all missionaries to leave. This was the death blow to the open practice of Christianity. The policy was driven by the Shogunate's growing apprehension about the unquestioning obedience of Christian subjects to foreign priests, a fear that was inflamed by the Shimabara Rebellion. The uprising, caused by merciless taxation and oppression, became a manifestation of Christian faith, with insurgents carrying banners inscribed "Praised be the Most Holy Sacrament." The Tokugawa Bakufu, convinced that such a rebellion could only have been possible with outside help, decided to cut all ties with Portugal and seal off the country from the world. This decision made the already brutal persecution of Christians a permanent, institutionalized feature of the state.

Mechanisms of Control: Surveillance and Reward

The Sakoku regime created a dense web of surveillance that made hiding nearly impossible. A decree was issued forbidding anyone from building a fence or hedge between houses, so that neighbors could see into each other's homes and report any suspicious behavior. The state also established a formal reward system for informants: three hundred pieces of silver for reporting a priest, two hundred for a brother, and one hundred for a lay Christian. For the destitute peasants of villages like Tomogi, this was a powerful temptation. The novel shows how this system destroyed trust, forcing Christians to wear "expressionless faces, much like puppets," unable to register sorrow or joy after years of secrecy. The constant threat of betrayal by a neighbor or even a fellow Christian for a monetary reward was a deliberate tool of the policy, designed to atomize the community and make organized resistance impossible.

The Fumie and the Pit: Rituals of Exclusion

The seclusion policy was enforced through specific, ritualized acts of degradation and violence. The most pervasive was the fumie test, an annual ceremony in which every household was required to trample on an image of Christ or the Virgin Mary. The novel describes how, on January 4th, the otona and leading citizens would go from house to house, and the master, his wife, children, and even the sick in their beds were made to touch the fumie with their feet. This was a form of biopolitical control, forcing individuals to publicly perform their renunciation of Christianity in a way that could be witnessed and recorded. For those who refused, the ultimate torture was the pit, or ana-tsurushi. The victim was hung upside down in a pit of filth, with a small incision behind the ear to let blood drip slowly, prolonging the agony for days. This torture was designed not just to kill, but to break the will, and it was the instrument that finally caused the apostasy of the senior missionary Christovao Ferreira and, ultimately, of Sebastian Rodrigues himself.

Consequences: The Swamp and the Skeleton

The ultimate consequence of the Sakoku policy, as articulated by the apostate Ferreira and the magistrate Inoue, was the spiritual and cultural transformation of Christianity itself. Inoue tells Rodrigues, "You were defeated by this swamp of Japan." Ferreira elaborates, arguing that the Japanese had never truly believed in the Christian God but had twisted it into something else, like a butterfly caught in a spider's web, leaving only the external skeleton. The seclusion policy did not merely suppress the religion; it cut off the root, ensuring that the sapling of Christianity would wither. The novel's appendix, a diary from the Christian Residence in Edo, shows the final, bureaucratic outcome of this policy: the apostate priest, now named Okada San'emon, lives under constant guard, writes a disavowal of his religion, and dies after thirty years of confinement, his body cremated and given a Buddhist posthumous name. The policy succeeded in its goal, reducing a once-thriving community of hundreds of thousands to a handful of hidden, transformed believers and a few broken, isolated apostates.