Story Structure — 4 Plot Phases
A Body in the Dobu River
Genzaburo Sakai's corpse is found in Tokyo's Dobu River. The investigation identifies him as a debt collector and connects Kinoshita to him through an unpaid debt.
Key Events
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Corpse Found in River — The corpse of debt collector Genzaburo Sakai is found in the Dobu River. Characters: Genzaburo Sakai
Location: Dobu River, Tokyo
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Victim Identified — The investigation identifies the dead man as Genzaburo Sakai. Characters: Genzaburo Sakai, First Investigation Section Chief
Location: Tokyo
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Sakai's Occupation Revealed — Sakai is established as a debt collector. Characters: Genzaburo Sakai
Location: Tokyo
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Kinoshita's Debt Established — Kinoshita is identified as a shoe shiner who owed money to Sakai. Characters: Kinoshita, Genzaburo Sakai
Location: Tokyo
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Kinoshita Apprehended — Kinoshita is apprehended in connection with Sakai's death. Characters: Kinoshita, First Investigation Section Chief
Location: Tokyo
The Convenient Confession
Kinoshita is apprehended and questioned about Sakai's death. He first claims responsibility, then reveals that he lied because prison would provide free rice.
Key Events
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Interrogation Begins — Investigators question Kinoshita after his apprehension. Characters: Kinoshita, First Investigation Section Chief
Location: Interrogation room
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False Murder Confession — Kinoshita says that he was the person who killed Sakai. Characters: Kinoshita, Genzaburo Sakai
Location: Interrogation room
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Prison Motive Explained — Kinoshita explains that he expected free rice if he went to prison. Characters: Kinoshita
Location: Interrogation room
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Confession Retracted — Kinoshita admits that his confession was a lie. Characters: Kinoshita, First Investigation Section Chief
Location: Interrogation room
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Case Becomes Uncertain — Kinoshita's retraction leaves Sakai's actual killer unidentified. Characters: Kinoshita, Genzaburo Sakai, First Investigation Section Chief
Location: Tokyo
A Past from Manchuria
After Kinoshita retracts his confession, the investigation turns toward Sakai's background. His repatriation from Manchuria and return to Japan become significant facts.
Key Events
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Sakai's Past Investigated — The investigation examines Sakai's personal background. Characters: Genzaburo Sakai, First Investigation Section Chief
Location: Tokyo
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Manchurian Repatriate Identified — Sakai is established as a repatriate from Manchuria. Characters: Genzaburo Sakai
Location: Manchuria
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Return to Japan Established — The investigation establishes that Sakai returned to Japan. Characters: Genzaburo Sakai
Location: Japan
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Marriage Discovered — Sakai's marriage to Rie Kawai becomes part of the case. Characters: Genzaburo Sakai, Rie Kawai
Location: Japan
Searching for Rie Kawai
The investigation discovers that Sakai had a wife, Rie Kawai. The search for Rie becomes the next major direction after the confession proves unreliable.
Key Events
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Search for Rie Begins — The investigation begins searching for Sakai's wife, Rie Kawai. Characters: Rie Kawai, First Investigation Section Chief, Genzaburo Sakai
Location: Tokyo
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Rie Becomes Central Lead — Rie becomes a central lead in the continuing investigation. Characters: Rie Kawai, First Investigation Section Chief
Location: Tokyo
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Division Continues Inquiry — The First Investigation Division continues examining the case and its connected people. Characters: First Investigation Section Chief, Kinoshita, Rie Kawai
Location: Tokyo
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Confession Questioned — Kinoshita's false confession remains an unresolved element of Sakai's death. Characters: Kinoshita, Genzaburo Sakai, First Investigation Section Chief
Location: Tokyo
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Background and Motive Reassessed — The inquiry reassesses Sakai's debt-collection work, Kinoshita's debt, and Rie's connection to him. Characters: Genzaburo Sakai, Kinoshita, Rie Kawai, First Investigation Section Chief
Location: Tokyo
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Investigation Remains Open — The investigation's search for Rie continues after Kinoshita withdraws his false confession. Characters: First Investigation Section Chief, Rie Kawai, Kinoshita, Genzaburo Sakai
Location: Tokyo