Naoko’s sister’s suicide and Naoko’s discovery of her body

Naoko’s sister’s suicide and Naoko’s discovery of her body are inseparable events: an unexplained death becomes a formative trauma for the younger sister who finds her. Naoko recounts the discovery to Toru Watanabe, describing how the sudden loss, her paralysis in the moment, and her silence afterward marked a crisis whose effects reached into her later illness and her relationship with Watanabe. The account also draws an explicit parallel with Kizuki’s death, establishing a pattern of losses that those left behind cannot make intelligible through a clear motive or explanation.

Background and the Unexplained Death

Naoko remembers her older sister as exceptionally capable and popular, while describing herself as the younger, “sweet little girl” who was dressed up, taught piano and ballet, and treated with loving attention by her sister. The contrast in their childhood roles shaped how Naoko understood herself alongside her sister, but her account does not offer that contrast as an explanation for the suicide. She says that nobody knew why her sister killed herself; the sister was seventeen, gave no warning, and left no note. Naoko immediately compares this to Kizuki, who also died at seventeen without an apparent sign or explanation.

That parallel does not resolve either death. It instead places the sister’s suicide within the book’s repeated experience of deaths whose causes remain obscure to those who survive them. Naoko’s sister had been known as intelligent and an avid reader, and after her death Naoko encountered her marginal comments, pressed flowers, and letters from boyfriends in her books. These traces prompted Naoko to cry, but they did not supply a reason for the death. What remains central is the disjunction between the life her family thought it knew and the unexplained fact of her suicide.

The Discovery

Naoko was in her first year of school when she found her sister, who was in sixth form. On a dark, rainy day in November, she returned from a piano lesson at 6:30. Their mother was making dinner and asked her to tell her sister that the meal was ready. Naoko went upstairs, called through the bedroom door, and, hearing no answer, opened it to look inside.

At first, she could not understand what she was seeing in the dark room. Her sister stood by the window, and Naoko noticed that she seemed taller than usual. As she moved closer, she saw the rope above her sister. She recalls taking in the details, then becoming unable to act according to her conscious intention: she wanted to run downstairs and call her mother, while her body seemed to move separately as she tried to lower her sister. She did not have the strength to do so. For five or six minutes she remained in a blank, disoriented state with her sister, until their mother came upstairs.

Immediate Aftermath and Lasting Effects

For three days after the discovery, Naoko could not speak. She lay in bed staring into space, unable to understand what was happening to her. When she later tells Watanabe about those days, she connects them to the depth of her illness: she says that it has deeper roots than he realizes, and that she is more flawed than he understands. Her disclosure gives the earlier loss a continuing place in the present; it is not simply a past tragedy, but part of the history through which Naoko understands her own vulnerability.

Naoko asks Watanabe not to put his life on hold for her. She tells him to go on ahead, not to let thoughts of her hold him back, and to visit sometimes and remember her. She fears that she may draw him into her suffering and says she does not want to interfere with his life or anyone else’s. Watanabe resists her attempt to reduce their bond to occasional visits and remembrance. The conversation therefore links the sister’s death to a present conflict about love, responsibility, and whether Watanabe can remain close to Naoko without being consumed by the losses that shape her life.

Repetition, Grief, and the Meaning of Death

The comparison with Kizuki recurs beyond Naoko’s account. Watanabe, who was the last person to see Kizuki before his death, describes being questioned by police and unable to find his place in the world during the months that followed. The deaths of Kizuki and Naoko’s sister are not given a shared cause, but their resemblance—the same age and the same absence of a discernible warning or note—makes the survivors’ search for an explanation feel persistently unanswered.

Watanabe later gives that experience a formulation: death exists not as life’s opposite but as part of life. The idea first takes shape after Kizuki’s death, and the parallel with Naoko’s sister is among the losses that give it weight. Yet Watanabe’s later reflection on Naoko’s death adds a limit to philosophical understanding: no truth, sincerity, strength, or kindness can cure the sadness of losing someone loved. The two insights work together without cancelling each other. Death is bound up with the lives of the living, but recognizing that fact does not make grief disappear.

Narrative Significance

Naoko’s account reaches Watanabe as an act of disclosure: she recounts the sister’s death and its immediate aftermath while explaining why she believes her illness is deeply rooted and why she urges him not to wait for her. The remembered scene thus connects childhood loss with present intimacy, while its unanswered cause resists a neat psychological explanation. Its significance lies not in revealing a motive, but in showing what the absence of one leaves behind: a traumatic memory, a silence that lasts three days, and a lasting fear that closeness may expose another person to the same darkness.

The episode also anticipates the novel’s broader movement between remembering the dead and trying to remain among the living. Watanabe’s later grief for Naoko returns him to the lesson he first formed after Kizuki’s death, but it also exposes the lesson’s limits. The sister’s suicide helps establish the pattern of inexplicable loss; Naoko’s memory of finding her shows how that pattern is lived from within, and Watanabe’s reflections show that naming death cannot complete the work of mourning.