Character Relationship Map: The Black House

Characters

• Shinji Wakatsuki (played by Seiyo Uchino) — protagonist
• Sachiko Komoda (played by Shinobu Otake) — supporting
• Shigenori Komoda (played by Masahiko Nishimura) — supporting
• Megumi Kurosawa (played by Misato Tanaka) — supporting
• Katsumi Kaneishi (played by Kenichi Katsura) — supporting
• Kazuya Komoda (played by Shun Hariya) — minor
• Kyoto Branch Office Salesman (played by Yuusuke Kishi) — minor

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Shinji Wakatsuki → Kyoto Branch Office Salesman (Professional Investigator And Witness) — The salesman is connected to an important early lead in the insurance inquiry.

  The insurance sales contact's encounter with Sachiko and the resulting policy purchase become part of Shinji's investigation into unusually high cover...

• Shinji Wakatsuki → Katsumi Kaneishi (Professional Investigation And Expert Analysis) — Kaneishi provides psychological interpretation relevant to Shinji's case.

  Kaneishi assesses the suspected killer's emotional disturbance, impulse control, and explosive behavior, information that informs the investigation Sh...

• Megumi Kurosawa → Katsumi Kaneishi (Professional Consultant And Specialist) — Megumi brings Kaneishi's psychological expertise into the investigation.

  Megumi asks Katsumi, a specialist in criminal psychology, to assess the suspected killer.

• Sachiko Komoda → Kyoto Branch Office Salesman (Professional Insurance Client And Sales Contact) — Their encounter initiates Sachiko's unusually large insurance enrollment.

  An insurance saleswoman encounters Sachiko while they are playing pachinko, after which Sachiko purchases a large insurance policy.

• Shigenori Komoda → Kazuya Komoda (Family Father And Child) — The plot presents Shigenori as Kazuya's father within the Komoda family.

  Shigenori arranges additional insurance coverage for himself and Sachiko's child, Kazuya.

• Sachiko Komoda → Kazuya Komoda (Family Mother And Child) — Sachiko is presented as Kazuya's mother and as someone connected to the aftermath of his death.

  Shigenori arranges additional coverage for Sachiko's child, Kazuya, and Sachiko is described as devastated after Kazuya's death.

• Sachiko Komoda → Shigenori Komoda (Family Spouses) — Their marriage is directly tied to the suspicious insurance arrangements.

  The plot identifies Sachiko and Shigenori as a married couple who arrange insurance coverage for themselves and Kazuya.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Shinji Wakatsuki → Megumi Kurosawa (Alliance Investigative Colleagues) — They contribute different investigative approaches to the same suspected insurance crime.

  Megumi participates in the investigation by seeking a criminal-psychology assessment while Shinji examines the insurance cases.

• Shinji Wakatsuki → Kazuya Komoda (Narrative Advocate For The Deceased) — Shinji seeks to uncover the truth behind Kazuya's death.

  Although the police treat Kazuya's death as suicide, Shinji becomes convinced that the child was murdered and pursues the matter.

• Shinji Wakatsuki → Shigenori Komoda (Conflict Investigator And Suspected Killer) — Shigenori becomes the primary subject of Shinji's investigation.

  Shinji becomes convinced that Kazuya was murdered and discovers that Shigenori previously used another identity and had a notorious insurance-claim hi...

• Shinji Wakatsuki → Sachiko Komoda (Conflict Investigator And Suspect) — Shinji increasingly treats Sachiko as both a potential victim and a central figure in the insurance-crime pattern.

  Shinji investigates Sachiko's unusually large insurance coverage and later warns her that Kazuya was murdered and she may be the next victim.

Story Analysis

An insurance investigator follows suspicious family policies and death benefits until financial records reveal a wider pattern of suspected crime.

Plot Progression

1. Claims Beneath the Fire — A deadly fire and a flood of suspicious insurance claims bring Shinji into a wider investigation. Hospital fraud and unusual benefit patterns suggest deliberate abuse rather than isolated accidents.
2. The Komoda Insurance Trap — Sachiko purchases a large policy after meeting an insurance contact at pachinko, while Shigenori arranges additional coverage for the family. Kazuya's death makes the financial pattern suddenly more u...
3. A Death Called Suicide — Police classify Kazuya's death as suicide, but Shinji suspects murder and uncovers Shigenori's former identity and troubling insurance history. The family's claims of grief conflict with their disturb...
4. The Warning and the Records — Kaneishi offers a cautious psychological assessment while investigators warn Shinji against unsupported accusations. Shinji nevertheless sends Sachiko a warning, and older records reveal a previous ma...
5. Benefits Without Payment — The accumulated records suggest a longer pattern surrounding Sachiko and large death benefits. The company cancels the contract and refuses payment under policy exclusions, exposing the family's suspe...