The Setting Sun Summary: A Family’s Decline in Post-War Japan
Introduction
Kazuko and her mother are forced to leave their Tokyo mansion and move to a small cottage in the mountains of Izu. Their money is gone.
Their place in society has vanished.
The war has ended, but for the old aristocracy of Japan, another war is just beginning.
The Setting Sun by Osamu Dazai follows Kazuko, a twenty-nine-year-old divorced woman, as she watches her refined mother fade away and her troubled brother sink into addiction.
The novel is set in the immediate aftermath of Japan’s surrender in World War II, a time when traditional values were crumbling.
Kazuko decides that passive suffering is no longer enough. She begins to fight back in the only way she believes she can.
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TL;DR: A Portrait of Defiance and Collapse
The story centers on three people: Kazuko, her graceful mother, and her opium-addicted brother Naoji. After losing their wealth, they retreat to the countryside, but escape proves impossible.
Naoji returns from the war broken and eventually takes his own life.
Kazuko, meanwhile, pursues a married, alcoholic writer named Uehara. She becomes pregnant by him and declares her child a “moral revolution” against the old world.
The novel is a melancholic, lyrical record of a family and a class that cannot survive the modern age.
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Characters In This Book
| Character | Role |
|---|---|
| Kazuko | The twenty-nine-year-old narrator who rejects aristocratic passivity and seeks a new life. |
| Mother | Kazuko’s widowed mother, described as the last true aristocrat in Japan. |
| Naoji | Kazuko’s younger brother, a war veteran with a severe opium addiction. |
| Uehara Jiro | A dissolute, alcoholic novelist and the object of Kazuko’s love. |
| Uncle Wada | Mother’s younger brother who manages the family’s dwindling finances. |
| Suga | Uehara’s gentle, long-suffering wife. |
| Dr. Miyake | A retired court physician who diagnoses Mother’s terminal illness. |
The Setting Sun Summary: A Family’s Last Days
Warning: Spoilers ahead.
Kazuko, her mother, and her brother Naoji are members of the Japanese nobility. After the war, their money disappears due to inflation and taxes.
Their uncle advises them to sell their home. They move to a modest house in Izu. Kazuko’s mother becomes ill almost immediately.
The two women try to build a quiet life. They grow vegetables and read. Kazuko burns a nest of snake eggs and fears she has brought a curse on her mother. Her mother has feared snakes since her husband died with one near his bed.
Naoji returns from the South Pacific. He is addicted to opium and drinks heavily. He constantly demands money from his mother and sister.
To pay for his habits, Kazuko and her mother sell their fine kimonos. The family’s decline accelerates.
Kazuko decides she will not fade away like her mother.
She remembers meeting a writer named Uehara six years earlier. He kissed her once. He is married, alcoholic, and widely despised. Kazuko writes him passionate letters. She asks to be his mistress. He does not reply.
Mother’s health worsens. Dr. Miyake visits from Tokyo and says she has tuberculosis. Kazuko nurses her, but the disease progresses. A snake appears on the porch.
Kazuko sees it as a sign. Mother dies peacefully in the autumn twilight.
After the funeral, Kazuko goes to Tokyo to find Uehara. She meets his wife, Suga, but does not turn back. She finds Uehara drunk in a bar.
He is physically ruined. They spend the night together.
The next morning, Kazuko learns that Naoji has killed himself. He left a note explaining he could not survive in a vulgar world. He also confessed his secret love for Uehara’s wife.
Kazuko returns to Izu.
She is pregnant with Uehara’s child. In a final letter, she declares her pregnancy a victory over the old morality. She will raise the child and fight on.
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Summary by Chapter
Warning: Spoilers in this section.
The book is divided into eight chapters.
Chapter 1: Snake
Kazuko recalls a moment when her mother’s graceful way of eating moved her. She then remembers burning snake eggs in the garden. Her mother fears snakes because of her husband’s death. The family’s financial troubles force them to sell their Tokyo home.
They move to Izu in December. Mother immediately falls ill but recovers under a local doctor’s care.
Chapter 2: Fire
Kazuko accidentally starts a fire in the woodpile. Neighbors help put it out. She feels deep shame. To cope, she works in the fields. Kazuko recalls her wartime labor.
Mother reveals that Naoji is alive and returning home. She also says their money is gone. Uncle Wada suggests Kazuko become a governess. Kazuko breaks down, and Mother agrees to sell their clothes instead.
Chapter 3: Moonflowers
Naoji returns from the war looking sallow and cynical. He insults their house and goes out drinking. Kazuko finds his old notebook called “Moonflower Journal.” It contains his confessions about drugs, alienation, and suicide.
Kazuko remembers her first meeting with Uehara and their kiss. She wonders if becoming depraved herself would ease her brother’s pain.
Chapter 4: Letters
Kazuko writes to Uehara. She calls him M.C. She declares her love and asks to have his child. In a second letter, she describes rejecting a wealthy elderly artist who proposed. In a third, she expresses her agony at waiting for a reply. She writes that ninety-nine percent of life is spent waiting.
Chapter 5: The Lady
Mother’s health collapses. Dr. Miyake arrives and tells Kazuko that Mother has tuberculosis. Kazuko hides the truth. Mother dreams of snakes and dies in the autumn. Kazuko notes her face looks beautiful in death, like a PietĂ .
Chapter 6: Outbreak of Hostilities
After the funeral, Kazuko declares war on the old morality. When Naoji brings a dancer home, she leaves for Tokyo. She visits Uehara’s house and meets his wife. She finds Uehara in a bar. He looks terrible.
They spend the night together. Kazuko feels her love for him revive.
Chapter 7: The Testament
This chapter is Naoji’s suicide note. He explains he could not survive in the post-war world. He tried to become coarse to fit in but failed. He rails against the phrase “all men are alike.”
He confesses his love for Uehara’s wife, Suga. He asks Kazuko to put their mother’s kimono in his coffin. He dies an aristocrat.
Chapter 8: Victims
Kazuko lives alone for a month. She writes to Uehara, who has begun to forget her. She tells him she is pregnant. She calls herself and Uehara victims of a transitional age.
She asks that Suga hold the baby once for Naoji’s sake. She ends her letter by calling Uehara “My Comedian” and expressing pride in her child.
Beneath the Surface: The Novel’s Deeper Ideas
| Theme | How the book presents it |
|---|---|
| The Decline of the Aristocracy | The family sells their mansion, kimonos, and jewelry to survive. Naoji’s suicide note describes the impossibility of living as a nobleman in a society that demands uniformity. |
| The Struggle of a Transitional Morality | Kazuko rejects traditional feminine modesty by pursuing a married man and choosing to bear an illegitimate child as a deliberate act of moral revolution. |
| War Trauma and Dissipation | Naoji returns from the South Pacific addicted to opium. Uehara drinks continuously to escape despair. Both men use substances to numb their inability to fit into the new world. |
| Maternal Grief | Mother endures poverty and illness quietly. Her peaceful death represents the passing of the last refined, non-confrontational generation of Japan. |
| Alienation | Naoji’s diary shows he is rejected by commoners as a snob and repulsed by the upper class. He belongs nowhere. |
Memorable Quotes from The Setting Sun
“Just because a person has a title doesn’t make him an aristocrat. Some people are great aristocrats who have no other title than the one that nature has bestowed on them, and others like us, who have nothing but titles, are closer to being pariahs than aristocrats.”
“Poverty is nothing. As long as you love me, all I want is to spend my whole life by your side. But you love Naoji more than you love me, don’t you?”
“I am what Nietzche described as ‘a woman who wants to give birth to a child.’ I want a child. Happiness does not interest me. I do want money too, but just enough to be able to bring up my child.”
“Man was born for love and revolution.”
“Only those who wish to go on living should. Just as a man has the right to live, he ought also to have the right to die.”
“We will live in perpetual struggle with the old morality, like the sun. You, too, please try to continue to fight your struggle. The revolution is far from taking place. It needs more, many more valuable, unfortunate victims. In the present world, the most beautiful thing is a victim.”
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What Type of Reader Will Enjoy The Setting Sun?
Readers who appreciate literary fiction that examines cultural decline will find this novel compelling.
The book suits those interested in post-war Japanese history and the psychological effects of national defeat. It also appeals to readers of character-driven stories where internal conflict matters more than plot.
The slow, reflective pacing and use of letters and diaries may appeal to those who enjoy intimate, confessional narratives.
The novel’s focus on forbidden love, addiction, and suicide makes it suitable for those drawn to dark, melancholic themes.
Story Snapshot
- Genre & Subgenre: Literary Fiction, Post-War Japanese Novel
- Core Narrative Tropes: Fall of the aristocracy, forbidden love, self-destruction, generational conflict
- Tone & Atmosphere: Melancholic, poetic, somber, desperate, with symbolic natural imagery
- Primary Conflict: Individuals versus a dissolving social order that erases their identity and values
- Pacing Style: Slow, reflective, character-driven, relying on internal monologue and letters
- ISBN-10: 0811200329
- ISBN-13: 978-0811200325
- Pages: 175
- Book Structure: Eight chapters narrated by Kazuko, including diary entries and letters
- Author: Osamu Dazai, a major Japanese novelist known for his confessional, autobiographical style and his tragic suicide in 1948.
