Character Relationship Map: Genome Hazard

Characters

• Ishigami Taketo (played by Hidetoshi Nishijima) — protagonist

  A thirty-four-year-old illustrator who believes he is living a happy married life until violent crime clues, memory gaps, and unsettling messages destabilize his identity. He discovers that his memori...

• Miyuki (played by Yoko Maki) — supporting

  Ishigami's wife in his present life. She calls him from her mother's house after he discovers apparent evidence of a murder, but his deteriorating memory makes him question whether their conversation...

• Sato Eisuke Hakase (played by Masatô Ibu) — supporting

  A scientist whose research centers on a dormant virus embedded in human brain-cell DNA. He explains that the virus can awaken, destroy brain cells, and cause Alzheimer's disease, while the treatment u...

• Ibuki (played by Manabu Hamada) — supporting

  An acquaintance who tries to help Ishigami as his memory loss and confusion worsen. His involvement connects him to the practical effort to understand the apparent murder and the identity mystery, alt...

• Han Yoo-ri (played by Yuri Nakamura) — supporting

  A suspicious woman who becomes closely connected to Ishigami's mystery. She warns that he may be infected with a deadly disease and reveals that he once lived under another identity, was her husband,...

Canonical Relationships

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

• Ishigami Taketo → Sato Eisuke Hakase (Professional Experiment Subject And Scientist) — Sato's research and the treatment that altered Ishigami's brain are central to Ishigami's memory loss and worsening condition; Ishigami confronts him to learn what happened and seek help.

  Sato explains the dormant virus research and that the treatment used to alter Ishigami's brain is reverting. Ishigami confronts him and demands the re...

• Ishigami Taketo → Han Yoo-ri (Family Former Husband And Wife) — Han Yoo-ri's revelation exposes Ishigami's former identity and marriage, contributing to his realization that his memories of her and Miyuki have merged.

  Han Yoo-ri reveals that Ishigami once lived under another identity and was her husband before abandoning that life.

• Ishigami Taketo → Miyuki (Family Husband And Wife) — Miyuki is Ishigami's wife in the life he believes he is living, but his memory loss makes him doubt their conversation and merges her image with Han Yoo-ri.

  The plot states that Ishigami marries Miyuki and identifies her as his wife. She calls him from her mother's house after he finds apparent signs of a...

Story Dynamics

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

• Ishigami Taketo → Ibuki (Social Acquaintance And Supporter) — Ibuki offers help during Ishigami's effort to understand the apparent murder and his identity mystery.

  The plot identifies Ibuki as Ishigami's acquaintance and says he tries to help as Ishigami's memory loss and confusion worsen.

Story Analysis

A man whose treatment has fractured his memory pursues the truth about his identities and the scientific experiment threatening his brain.

Plot Progression

1. Birthday Fractures — Ishigami begins with confidence in his married life, but unsettling messages and memory gaps disrupt that certainty. Apparent murder evidence at home vanishes, leaving him unsure what is real.
2. The Other Marriage — As Ishigami loses basic details about his life, Ibuki tries to help and Han Yoo-ri enters the mystery. Han's revelations expose a former identity and marriage, deepening the conflict between Ishigami'...
3. Clues Behind the Disappearance — Candles, chemical formulas, and a hidden body become part of the investigation. Ishigami suspects that someone tried to erase the crime and prevent him from returning to his former life.
4. The Scientist's Explanation — Sato explains the dormant virus and the treatment that altered Ishigami's brain. As the treatment reverts, Ishigami's memories return while the danger to his brain increases.
5. Research Under Threat — Ishigami confronts Sato, threatens to use nitroglycerin, and demands the research files and the truth. He learns that his transformation began as a failed attempt to conceal the research and prepares...