Hakumi and Noboru Wataya

Kumiko and Noboru Wataya are siblings by birth but strangers in practice, joined by family history and a dark secret that Kumiko only gradually discloses. Their relationship is shaped by her separation from her family in early childhood, the death of the sister who had cared for her, and Kumiko’s eventual conviction that Noboru had exerted a destructive influence over both sisters. The novel leaves Toru’s most expansive explanation of that influence unverified, while Kumiko’s letter confirms her own experience of captivity and her determination to end her brother’s life.

Family Background and Estrangement

Noboru is nine years older than Kumiko. Their older sister, five years older than Kumiko, stood between them in age and, for a time, served as the person who made family life bearable for her younger sister. Kumiko had been sent from Tokyo to live with her grandmother in Niigata at the age of three. Her parents explained the move as a response to her supposed frail health, but Kumiko did not remember being ill and doubted that explanation. She had heard that a longstanding quarrel between her mother and grandmother had been settled by sending her away, leaving her to understand herself as a child used to resolve an adult dispute.

When Kumiko returned to her parents’ home, she did not experience it as a homecoming. She was guarded and withdrawn, unable to feel secure even with her parents, while Noboru scarcely knew she existed. Her sister, by contrast, tried patiently to reach her: she shared a room with Kumiko, talked and read with her, accompanied her to school, helped with her homework, and comforted her when she cried. That relationship ended when the sister died of food poisoning the year after Kumiko returned from Niigata. Kumiko later remembered the loss with guilt and wondered whether the household might have been different had her sister lived. The novel later complicates the reported cause of death through Kumiko’s suspicions about Noboru, but does not establish the circumstances independently.

A Brother Without Intimacy

As adults, Kumiko and Noboru remained separated despite their kinship. The narrator recalls that the subject of Noboru brought a strange expression to Kumiko’s face, though he could not determine what it meant. He himself felt no affection for Noboru, and Kumiko considered that hostility reasonable: she was not fond of her brother either. Without the blood relationship, the narrator thought, the two might never have spoken.

Noboru’s age and the years Kumiko spent away from the family help explain the absence of recognizable closeness, but they do not account for the fear and secrecy that later surround him. When the narrator first met Noboru, he hoped that a man near his own age might help him approach Kumiko’s father about marriage. Kumiko warned him, with difficulty, not to count on her brother’s help. The exchange presents Noboru not as a natural intermediary within the family but as someone from whom Kumiko already expected little support.

Kumiko’s Account of Harm and Captivity

In her letter to the narrator, Kumiko says she should have spoken honestly much earlier but lacked the courage and continued to hope matters would improve. She then states that she intends to kill Noboru, who is unconscious in hospital, by disconnecting his life-support system. She says she has learned how the system works, plans to wait until he is dead, and intends to give herself up and accept prosecution without offering an explanation or defense. Her stated purpose is limited and direct: she wants to end the life of one person, her brother.

The letter also discloses what Kumiko believes Noboru did to her and their sister. She says that he had done the same to their sister years earlier and that he had defiled them, clarifying that she does not mean physical violation. She describes losing the freedom to act and shutting herself away, yet emphasizes that no guard or literal chain confined her: the restraints were within herself. One part of her wanted to escape, while another had surrendered hope and kept her from doing so. She believes she lost the right to return to the narrator both because of Noboru’s influence and because she felt she had irreparably compromised herself.

Kumiko further revises what she had previously told the narrator about her sexual relationships, admitting that she had been with many men rather than one. She cannot say with certainty what caused this, but suspects Noboru’s influence, imagining that he had opened something within her and drawn her into a course she could not understand. Her account conveys the depth of her alienation from her own motives: she had not felt, at the time, that she was betraying her husband, and she questions whether the self writing the letter can confidently be called her real self. These are Kumiko’s retrospective explanations, not an independently verified account of Noboru’s actions.

Toru’s Interpretation and Its Limits

In a dark conversation with a woman he takes to be Kumiko, Toru constructs a broader explanation for the family’s history. He speculates that the Wataya family carried an inherited tendency that frightened Kumiko and made pregnancy a turning point: she may have feared that this tendency would appear in a child. He then proposes that Noboru was responsible for their sister’s death, that the sister had warned Kumiko before dying, and that Noboru possessed a power capable of drawing something out of people. Toru connects this theory to Noboru’s treatment of Creta Kano and imagines that Noboru’s influence later expanded through television and other media into a political danger.

Toru’s account develops further into a proposed sequence: Kumiko may have sensed an undefined threat while growing up, regained some distance after marrying and leaving the Wataya household, and then felt drawn back toward the danger she had tried to escape. He suggests that her pregnancy awakened something dormant, that this explains her abortion, and that Noboru sought to draw her back to him. Yet the narrator explicitly recognizes that he has no solid basis for what he has imagined. The scene therefore places inference beside silence rather than turning his theory into confirmed biography. Kumiko’s letter gives direct evidence of her felt captivity and suspicions about her brother, but it does not verify every element of Toru’s account or establish the sister’s death as murder.

Final Break and Narrative Significance

The relationship culminates not in reconciliation but in Kumiko’s planned killing of Noboru while he lies unconscious. She intends to act as his sister, remain with him in hospital, and surrender herself once he is dead. She anticipates arrest and public debate but refuses in advance to make her case to the media or to defend herself in court. Her choice converts a long, inward struggle into a concrete decision, while leaving its history only partially explained.

Their sibling bond thus carries two sharply different meanings. In family terms, it is a tie marked by absence: Kumiko was sent away, returned to a household where Noboru scarcely knew her, and lost the sister who had cared for her. In Kumiko’s later understanding, the same blood relationship binds her to the source of a private harm she cannot fully explain and cannot simply leave behind. The gap between her testimony and Toru’s imaginative reconstruction is essential: the novel presents the relationship as consequential and frightening without making every alleged cause certain.