Character Relationship Map: Impossibility Defense

Characters

• Tadashi Usobuki (played by Tori Matsuzaka) — protagonist

  Tadashi Usobuki is the mysterious contract killer at the center of the story. He accepts requests from clients with murderous intentions, but warns that impure motives can turn the desire for murder b...

• Tomoko Tada (played by Erika Sawajiri) — supporting

  Tomoko Tada is a police inspector investigating a hanging in an apartment and the unusual deaths connected to Tadashi Usobuki's contracts. She arrests Ueno Takumi for obstructing the investigation and...

• Asao Momose (played by Mackenyu) — supporting

  Asao Momose is Tomoko Tada's new police colleague. He begins learning how to interrogate suspects while trying to understand the strange crimes surrounding the investigation. His role connects the pol...

• Takeru Kawabata (played by Shotaro Mamiya) — supporting

  Takeru Kawabata becomes a direct target of the final bombing threat. A bomber uses a phone-controlled device while threatening both him and children, turning the investigation into an urgent rescue cr...

• Yoshiki Akai (played by Tet Wada) — supporting

  Yoshiki Akai is a police authority involved in the final emergency response. When the bomber threatens simultaneous explosions, he orders the police to contact Lark Kindergarten and General Hospital,...

• Yu Kimura (played by Erina Mano) — supporting

  Yu Kimura hires Tadashi Usobuki to kill her estranged sister, driven by jealousy, rejection, and shame after financial problems force her into prostitution while her sister succeeds as a jewelry desig...

• Isao Kijima (played by Kensei Mikami) — supporting

  Isao Kijima is connected to a case in which hypnosis and suggestion may cause a person to perceive harmless objects as deadly weapons. The unusual incident becomes evidence that several deaths were pr...

Canonical Relationships

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

• Asao Momose → Isao Kijima (Professional Investigator And Case Subject) — Kijima's case contributes to Momose's training and understanding of the crimes.

  Asao Momose learns interrogation methods while investigating the unusual crimes, including the case involving Isao Kijima.

• Tomoko Tada → Isao Kijima (Professional Investigator And Case Subject) — Kijima's case is part of the investigative pattern Tomoko is trying to understand.

  Tomoko investigates unusual crimes, including the case involving Isao Kijima and the psychological manipulation connected to it.

• Yoshiki Akai → Takeru Kawabata (Power Emergency Protection) — Yoshiki's emergency command places Takeru within the police protection crisis.

  Yoshiki Akai orders the police to respond after the bomber threatens Takeru Kawabata and children.

• Tadashi Usobuki → Yu Kimura (Professional Contract Killer And Client) — Usobuki accepts Yu's murder request and exposes the conflict within her motives.

  Yu Kimura asks Tadashi Usobuki to kill her estranged sister.

• Tomoko Tada → Yoshiki Akai (Power Police Command Relationship) — Yoshiki directs the police response during the bombing crisis involving Tomoko.

  Yoshiki Akai orders the police to contact Lark Kindergarten and General Hospital after bombs are reported.

• Tomoko Tada → Asao Momose (Professional Police Colleagues) — They work within the same police investigation, with Tomoko serving as the more experienced investigator.

  Asao Momose is introduced as Tomoko Tada's new colleague and learns how to interrogate suspects during the investigation.

Story Dynamics

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

• Tadashi Usobuki → Takeru Kawabata (Narrative Indirect Threat Connection) — Usobuki's contract network is indirectly linked to the danger facing Takeru.

  The final bombing crisis is connected to a previous contract involving Isao Kijima, while Takeru Kawabata is one of the people directly threatened by...

• Tomoko Tada → Takeru Kawabata (Alliance Protector And Endangered Person) — Tomoko becomes responsible for responding to the threat against Takeru during the climax.

  A bomber threatens Takeru Kawabata and children, forcing Tomoko Tada to choose whom to save.

• Tadashi Usobuki → Isao Kijima (Conflict Contract-Related Adversaries) — Kijima's case becomes connected to the larger chain of violence and the final bombing threat.

  The plot includes a case involving Isao Kijima, and the bomber later reveals that a previous contract concerning Kijima helped finance the explosives.

• Tadashi Usobuki → Tomoko Tada (Narrative Investigator And Subject) — Tomoko represents the investigative force pursuing the criminal pattern surrounding Usobuki.

  Tomoko Tada investigates unusual deaths and crimes connected to the service in which Tadashi Usobuki is involved.

Story Analysis

A contract-killing mystery explores how intention, psychological manipulation, and impure motives produce consequences beyond ordinary physical violence.

Plot Progression

1. The Booth And The Rule — The film introduces the Impossibility Defense and the mysterious telephone-booth service. Usobuki warns that impure intentions can turn murderous desire back against the client.
2. Deaths Without A Weapon — Tomoko investigates a hanging and arrests a suspect for obstructing the inquiry. Momose begins police training as the investigators discover deaths that may have been caused through suggestion rather...
3. Contracts And Corrupted Motives — Usobuki accepts the request involving Torimori and exposes stolen evidence, coercion, and conflicting intentions. The case demonstrates how a client's impure motive can contribute to the client's down...
4. Jealousy Becomes A Confession — Yu asks Usobuki to kill her estranged sister while struggling with financial hardship, jealousy, and shame. After an attempted reconnection fails, Yu leaves a confession and commits suicide.
5. The Bombs Await An Answer — A bomber threatens Takeru and children with a phone-controlled device and links the explosives to an earlier Kijima contract. Yoshiki orders emergency contact with two locations, but the outcome remai...