Hisagoro is a minor Christian prisoner who dies from exhaustion and illness during forced labor at the prison near Nagasaki, his death prompting envy from fellow believers who see his suffering ended and his entry into eternal rest.

Jonassen, a clerk at the Dutch East India Company's trading post on Dejima in Nagasaki, provides the only external, non-Jesuit perspective on the fates of the apostate priests Christovao Ferreira and Sebastian Rodrigues in the final years of their lives. His diary entries, spanning 1644 and 1645, document the ongoing persecution of Christians, the priests' collaboration with the Japanese authorities, and the deep suspicion the regime harbored even toward the Dutch, whom it suspected of harboring Catholic sympathies. Jonassen's records offer a stark, bureaucratic counterpoint to the novel's earlier spiritual and emotional intensity, confirming the priests' public apostasy while hinting at the enduring, hidden faith of the Japanese Christians.

Betrayal is a central, recurring concept in Shusaku Endo's *Silence*, manifesting not only as the literal act of informing on Christians to the authorities but also as a deeper, more complex spiritual and cultural phenomenon. It is embodied by the character Kichijiro, whose repeated betrayals of Rodrigues and other Christians are driven by weakness and fear, and it is mirrored in the apostasy of the priests Ferreira and Rodrigues himself. The novel explores betrayal not as a simple moral failing but as a painful, often necessary act of love or survival within a hostile environment, ultimately questioning the nature of fidelity, weakness, and the silence of God.

The crypto-Christians of Japan are the hidden believers who, after the Tokugawa Shogunate's systematic persecution and expulsion of missionaries from 1614 onward, preserved their faith in secret for generations without priests, sacraments, or visible churches, developing their own lay-led organization and adapting Christian practice to survive in a hostile environment. Their existence and eventual emergence in 1865 form the historical backdrop of Shusaku Endo's novel *Silence*, and their fate—both their heroic endurance and the gradual transformation of their faith—becomes the central theological and cultural problem the novel explores.

The pit torture (ana-tsurushi) is the most feared and effective method of inducing apostasy employed by the Tokugawa Shogunate against Christians in 17th-century Japan, a technique that physically breaks the body while psychologically exploiting the victim's compassion for fellow sufferers, ultimately leading to the apostasy of both Christovao Ferreira and Sebastian Rodrigues.

Rodrigues is captured by Japanese officials after Kichijiro betrays him for silver, ending his brief period of underground ministry and beginning his imprisonment and interrogation.

Rodrigues' apostasy is the climactic event of Shusaku Endo's Silence, in which the Portuguese Jesuit priest, after prolonged psychological and physical torment, tramples on a fumie (a bronze image of Christ) to save the lives of Japanese Christians hanging in the pit. This act shatters his idealized image of Christ and his identity as a priest, yet paradoxically leads him to a new, more intimate understanding of divine love and suffering.

A butterfly caught in a spider's web is a central metaphor in Shusaku Endo's novel Silence, used by the apostate priest Christovao Ferreira to describe the fate of Christianity in Japan. The image captures how the Christian faith, once planted in Japan, was gradually hollowed out and transformed by the native culture, leaving only its external form while its true essence decayed.

Laudate Eum is a Latin phrase meaning 'Praise Him,' carved into the wall of a dark prison cell by the apostate priest Christovao Ferreira during his own imprisonment, and later discovered by Sebastian Rodrigues as a haunting testament to faith, despair, and the limits of praise under torture.

The silence of God is the central theological and existential crisis in Shusaku Endo's novel Silence, representing the perceived absence of divine response to the suffering of Japanese Christians and missionaries during the Tokugawa persecution. This silence becomes the primary source of doubt and anguish for the protagonist, Sebastian Rodrigues, and ultimately shapes his understanding of faith, love, and the nature of Christ.

The East China Sea is the body of water that separates Japan from the Asian mainland, serving as the final maritime passage for Portuguese missionaries traveling from Macao to Japan during the Tokugawa persecution. In Shusaku Endo's novel *Silence*, the sea is not merely a geographical setting but a central symbol of the vast, indifferent distance between the Christian West and the Japanese 'swamp' that absorbs and transforms foreign ideologies. It is the space across which missionaries like Sebastian Rodrigues and Francisco Garrpe journey, carrying their faith into a land that will ultimately defeat them, and it becomes the silent witness to the martyrdoms that define the novel's moral crisis.

Lisbon, the capital of Portugal, is the point of departure for the novel's central missionary journey and the spiritual home of Sebastian Rodrigues, whose memories of the city shape his identity and faith throughout his ordeal in Japan.

Nagasaki is the central city of Shusaku Endo's novel *Silence*, serving as the seat of the Tokugawa Shogunate's anti-Christian persecution, the site of the magistrate's office, the location of the infamous fumie ceremony and the pit torture, and the final place of residence for the apostate priests Sebastian Rodrigues and Christovao Ferreira. It is the geographical and symbolic heart of the novel's conflict between Christianity and the 'swamp of Japan'.

The Enclosed Guardhouse is a prison facility within the Christian Residence in Edo where Sebastian Rodrigues, under the Japanese name Okada San'emon, was confined for the last thirty years of his life, and where the authorities conducted surveillance, interrogations, and torture of suspected Christians, including Kichijiro and Hitotsubashi Matabe.

Gengiroku is the polemical manuscript written by the apostate missionary Christovao Ferreira at the command of the Japanese magistrate Inoue, intended to refute Christian doctrine and justify the suppression of Christianity in Japan. It represents the ultimate intellectual betrayal of the faith Ferreira once served, transforming his theological knowledge into a weapon against the Church.

The holy picture (fumie) is a central object in Shusaku Endo's Silence, serving as a tool of persecution and a symbol of faith, apostasy, and the transformation of Christianity in Japan. It is a copper or wooden plaque bearing an image of Christ or the Virgin Mary, which suspected Christians are forced to trample upon to prove their renunciation of the faith. The fumie becomes a site of profound spiritual and physical conflict, where the act of trampling is not merely a formality but a moment of deep personal anguish and, for some, a paradoxical encounter with the divine.

The prison in Shusaku Endo's *Silence* is not merely a physical location but a transformative space where the novel's central theological and psychological conflicts are staged. It functions as a site of ambiguous tranquility, a crucible for doubt, and the ultimate arena where Rodrigues's faith is tested and broken, culminating in his apostasy. The prison's shifting character—from a place of deceptive peace to a chamber of unbearable sound—mirrors Rodrigues's own spiritual deterioration.

The Christian Residence in Edo was the institution where the apostate Portuguese priest Sebastian Rodrigues, renamed Okada San'emon, was confined for the last thirty years of his life, serving as a controlled site of surveillance, forced labor, and the state's final victory over Christianity in Japan.

The Tokugawa Shogunate (Tokugawa Bakufu) was the military government that unified Japan in the early 17th century and, after initially tolerating Christian missionary work for trade, systematically persecuted Christianity through edicts, surveillance, torture, and execution, ultimately sealing the country from foreign influence and creating what the novel describes as a 'swamp' that absorbed and transformed the foreign faith.

The Order of Saint Augustine (Augustinians) is a Catholic religious order that participated in the Japanese mission during the 'Christian century,' contributing missionaries who were captured, tortured, and martyred alongside members of other orders, and whose presence is referenced in the novel as part of the broader missionary effort that ultimately failed to take root in Japan.

Kichijiro's relationship with his family is defined by his apostasy during their collective martyrdom, an act that severs him from them and becomes the haunting secret that drives his cowardice, his betrayals, and his desperate, repeated returns to the sacraments throughout the novel.

The Rodrigues-Christ relationship is the central spiritual axis of Silence, tracing how Sebastian Rodrigues's idealized, romanticized vision of Christ's face is shattered by the silence of God amid persecution, and ultimately transformed through his apostasy into a paradoxical, intimate encounter with a suffering Christ who commands him to trample.

The Garrpe-Kichijiro relationship is a stark contrast between a resolute missionary and a cowardly, repeatedly apostatizing Japanese Christian, defined by Garrpe's immediate suspicion, contempt, and refusal to trust Kichijiro, which ultimately proves prophetic.

The Rodrigues-Garrpe relationship is the central fraternal bond of the novel, a partnership of shared vocation, mutual support, and eventual separation that defines the moral and emotional trajectory of the mission to Japan. Their friendship, forged in seminary and tested by persecution, ultimately fractures under the weight of divergent fates, with Garrpe's heroic death and Rodrigues's apostasy marking the two poles of Christian witness in the novel.

The relationship between Sebastian Rodrigues and Monica, a Japanese Christian peasant woman, is defined by her acts of humble generosity, her steadfast faith in the face of persecution, and her tragic death, which becomes a profound source of guilt and spiritual crisis for Rodrigues.

The Edict of Expulsion (1614) was the Tokugawa Shogunate's formal decree banning Christianity from Japan, declaring the foreign religion a subversive threat to the state and ordering all missionaries to leave the country. It marked the decisive turning point in the persecution of Japanese Christians, transforming sporadic local crackdowns into a systematic, state-driven campaign of eradication that would last for centuries.

The fumie test was a state-mandated ritual in Tokugawa Japan requiring suspected Christians to trample on an image of Christ or the Virgin to prove their apostasy, serving as the regime's primary instrument of religious surveillance and the central moral crisis of the novel.

The Year of the Cock marks the final year of Sebastian Rodrigues' life, the year in which he died after more than three decades of confinement in the Christian Residence in Edo, having lived under the Japanese name Okada San'emon since his apostasy.

The Fourth Year of Enpo (1676) marks a period of intensified persecution and surveillance within the Christian Residence in Edo, as documented in the official diary of an officer. During this year, Kichijiro, the attendant of the apostate priest Okada San'emon (formerly Sebastian Rodrigues), was arrested for possessing a Christian image, leading to a chain of investigations, tortures, and the reinforcement of anti-Christian measures that reveal the regime's relentless effort to eradicate the faith.

July 24, 1587, marks the moment when the Japanese regent Toyotomi Hideyoshi, in a sudden and violent rage, issued an expulsion decree against Christian missionaries, a pivotal act that initiated the systematic persecution of Christianity in Japan and set the stage for the century of suffering, apostasy, and cultural conflict depicted in Shusaku Endo's novel.