Test detail

Below, I will explain the content, stated grounds, and official rebuttals regarding the theory that "Prime Minister Abe's assassination was carried out by someone other than Yamagami Tetsuya" (the so-called "multiple perpetrator theory" or "third-party perpetrator theory").

⚠️ Important Preliminary Note

First, this must be stated clearly. Legally, the sole perpetration by Yamagami Tetsuya has been definitively established through judicial proceedings. On January 21, 2026, the Nara District Court sentenced the defendant to life imprisonment without parole, and he has appealed against this ruling. The defendant himself acknowledged the murder in court, stating "There is no doubt that I did this." The "multiple perpetrator theory" discussed below is primarily advocated on the internet and by certain fringe groups, and is rejected by the courts, prosecutors, and police alike.

1. Overview of the Incident

On July 8, 2022, former Prime Minister Shinzo Abe was shot and killed while giving a campaign speech near Kintetsu Yamato-Saidaiji Station in Nara City, Nara Prefecture. During questioning, the perpetrator stated, "I harbored resentment toward the Unification Church (Family Federation for World Peace and Unification), and targeted Abe due to his deep connections with the organization."

Yamagami Tetsuya, age 45 at the time, was charged with murder and violations of the Firearms and Swords Control Law for using a homemade gun to kill former Prime Minister Abe during the campaign speech.

2. What Are the "Multiple Perpetrator Theory" and "Third-Party Perpetrator Theory"?

"The shot fired by Yamagami was a blank, and there was actually a sniper elsewhere," "Bullet holes remain in unnatural locations," "The media is not reporting the truth"—immediately after the incident, such "questions" circulated on SNS, and posts claiming that a "real perpetrator" existed separate from Yamagami Tetsuya proliferated.

From the outset, there were some indications of "possible third-party involvement," but the Nara Prefectural Police confirmed that Yamagami Tetsuya, who was arrested at the scene, acted alone without providing sufficient explanation. The investigation concluded in March 2023.

3. Main Claims and Grounds of the "Multiple Perpetrator Theory"

(1) Claims by the "Society to Investigate the True Facts"

The "Society to Investigate the True Facts of the Former Prime Minister Abe Assassination" includes Chairman Attorney Minaide and various specialists such as former TBS Washington Bureau Chief Yamaguchi Noriyuki, physicians, medical doctors, former police officials, and former members of parliament. They claim to be conducting "careful verification through scientific, medical, and legal approaches."

Yamaguchihas stated that "Originally, many medical and police professionals raised doubts about the lone-perpetrator theory. We have partnered with such specialists and established six research divisions for multifaceted analysis."

The society also questions the manner of the trial: "The proceedings of this case—from scheduling to verdict—proceeded in an exceptional manner as though everything was predetermined. We view this as a 'fixed match.'"'

(2) "Sniper Theory"

A theory circulating on the internet and elsewhere claims that "the crime was committed by a sniper."

One basis for this theory involves questions about the bullet's trajectory. It was noted that "although Yamagami fired from nearly a horizontal direction, the bullet that entered the neck was found in the right upper arm, lower and to the right," which seemed inconsistent.

(3) "Blank Shot Theory"

Even after Yamagami stated in court, "There is no doubt that I did this," SNS continued spreading the conspiracy theory that "the defendant fired blanks" and "the real perpetrator is someone else."

(4) Voices Drawing "Parallels to the Kennedy Assassination"

Novelist Shibata Tetsukoh wrote in his book "Assassination": "I felt similarities between the 'Shinzo Abe Former Prime Minister shooting incident' and the 'John F. Kennedy Presidential assassination incident' that occurred in the United States in 1963." He noted that "The JFK assassination is attributed to Lee Harvey Oswald, a 24-year-old youth, but more than 60 years later, debate continues about whether 'another real perpetrator might have existed.'"

4. Rebuttal by Investigative Authorities, Prosecutors, and Courts

Regarding these theories, judicial and investigative authorities have comprehensively rejected them with detailed evidence.

(1) Presentation of Ballistic and Physical Evidence

Police officers who conducted the crime scene investigation testified in court. They presented diagrams showing the direction the bullet traveled and testified that bullet casings were found along a straight line from the defendant to Abe and beyond, on street campaign vehicles and other objects. The bullet damaged the legislator's badge Abe wore and possibly grazed the hair of a nearby Liberal Democratic Party official.

(2) Detailed Verification of the Gun and Bullets

According to prosecution evidence, the two-barrel pipe gun used for shooting could fire six bullets of approximately 9mm diameter simultaneously. The defendant fired twice at Abe; the first shot missed, but the second struck, causing fatal wounds.

(3) Testimony from Judicial Autopsy

The pathologist who performed the judicial autopsy testified that two bullets entered Abe's body—one from the left upper arm and one from the neck. The bullet entering the left upper arm damaged the subclavian artery, resulting in a state "nearly equivalent to instantaneous death." The bullet entering the neck, though not immediately fatal, passed through the right chest and lodged in the right humerus.

(4) Specific Rebuttal to the "Sniper Theory"

The sniper theory, based partly on the observation that bullets entered the neck and were found in the right upper arm despite nearly horizontal gunfire, was contradicted by the autopsy doctor's testimony: "If the victim had his right arm raised to hold a microphone, this would not be surprising," and the bullet's trajectory was consistent without contradiction.

(5) Position of Prosecutors and Nara District Prosecutors' Office

An official from the Nara District Prosecutors' Office stated, "We did not specifically focus on conspiracy theories," and added, "Through careful prosecution, the third-party perpetrator theory should have no basis for discussion whatsoever."

(6) Statements by the Defendant Himself

In court, the defendant apologized, stating that "conspiracy theories originate from me."

5. Why Did Conspiracy Theories Spread?

On the internet, the conspiracy theory that "the real perpetrator is someone else" continues to spread. A simple "what if Yamagami weren't the perpetrator" has been "continually reinforced on SNS."

Summary

In conclusion, the "perpetration by someone other than Yamagami" theory currently lacks judicial and evidentiary foundation and is rejected by courts, prosecutors, and investigative authorities. The defendant himself has acknowledged the crime, and a life imprisonment sentence was handed down in January 2026 (currently under appeal). These theories are denied socially and legally as "conspiracy theories," and this must be clearly stated.

Regarding the assassination of former Prime Minister Shinzo Abe, conspiracy theories and various other explanations circulate; however, the official conclusion reached through investigation is that Yamagami Tetsuya acted alone. While conspiracy-oriented explanations exist, the following represents such claims, though they remain speculative without factual basis:

1. Multiple Perpetrator Theory: Some suggest that besides Yamagami, there were co-conspirators involved. However, official investigation has found no evidence to support this.

2. Theory of Organizational Involvement Behind the Scenes: Some claim that organized intent lay behind the incident. However, this too lacks evidence and is categorized as part of conspiracy theory.

3. Suspicions Regarding Ambiguity of Motive: Some perceive inconsistencies in Yamagami's stated motivation and suggest the existence of alternative motives or perpetrators.

While these explanations are debated on the internet and certain media outlets, they contradict official pronouncements from investigative authorities and are considered low in credibility. Regarding incident-related information, it is important to base judgments on reliable official statements. Events related to this incident should be evaluated primarily on the basis of publicly verified facts and official statements from authorities.

Regarding the shooting incident involving former Prime Minister Shinzo Abe, the official position and trial verdict establish that Yamagami Tetsuya is the perpetrator. However, some individuals claim that someone other than the defendant, or possibly co-conspirators, may be involved. These claims are primarily found online and are often referred to as 'conspiracy theories.'

The main contents of theories regarding perpetration by someone other than Yamagami are as follows:

• Existence of Another Sniper:
• Based on footage and audio from the incident scene, some argue that there may have been a sniper shooting from a different location (for example, the top of a multi-story parking structure) distinct from where Yamagami fired.
• Some voice doubts about whether the official explanation—that Abe was shot at close range by Yamagami—is consistent with the bullet trajectory and the nature of Abe's injuries. However, testimony by the autopsy doctor at trial indicated that the angle was not from above but from the side, and there is no contradiction. The theory of another sniper has been rejected.
• Doubts Regarding the Homemade Gun's Lethality:
• Some question whether the homemade gun used by Yamagami had sufficient power to inflict fatal wounds on Abe.
• 'Dark Forces' Behind the Incident:
• Following the incident, the Unification Church connection was extensively reported. Some believe that Japanese media coverage has been abnormally intense and that prosecutors may have guided public opinion toward the lone-perpetrator theory. This has led some to speculate whether there might be 'dark forces' involved or whether the focus on the Unification Church issue was intentionally directed.
• Theory that Abe Is Alive:
• In extremely fringe circles, some suggest that given the influence and financial resources of the Unification Church, Abe may still be alive and living under an assumed identity.

However, these theories diverge from official investigation results and trial judgments.

After the incident, the Nara Prefectural Police immediately arrested Yamagami Tetsuya as the apparent perpetrator. Following interrogation, Yamagami confessed that he harbored resentment toward the Unification Church after his mother donated a large sum to the organization, which led to his family's collapse. He then targeted former Prime Minister Abe, whom he believed had deep connections to the group. In the Nara District Court's first trial, Yamagami was found guilty of murder and sentenced to life imprisonment without parole. During this trial, detailed examination was conducted regarding bullet trajectories and cause of death, and through expert medical testimony, conspiracy theories such as shooting from above were rejected.

Regarding the shooting incident involving former Prime Minister Shinzo Abe (July 8, 2022, Nara City)—detailed explanation of the 'conspiracy theory/claim' that someone other than defendant Yamagami Tetsuya carried out the assassination (multiple perpetrator theory, sniper theory, etc.):

The official conclusion from investigation and trial is that the incident was carried out solely by Yamagami Tetsuya. The defendant himself acknowledged the murder charge, was found guilty in the jury trial beginning in 2025, and reportedly received a life sentence around January 2026. Investigation authorities, prosecutors, defense counsel, and the defendant all deny involvement by any co-perpetrators. Nevertheless, since immediately after the incident, theories claiming "Yamagami was not the perpetrator, or that he did not act alone" have circulated on SNS (X/Twitter, YouTube, etc.) and continue to be advocated by some.

1. Main Claims of This Theory

The core of this theory is "Yamagami was not the perpetrator, or acted with accomplices; another true perpetrator (such as a sniper) exists." Specific points include:

• Claims Based on Inconsistencies in Medical and Autopsy Findings

On the day of the incident, Professor Fukushima Hidekatsu and others at Nara Prefectural Medical University Hospital announced at a press conference that the victim had "two gunshot wounds to the neck," "a large hole in the heart," and "cardiac/major vessel injury resulting in cardiopulmonary arrest." However, the following day's judicial autopsy by the Nara Prefectural Police reported "gunshot wounds at one location on the right side of the neck and one on the left upper arm," "no bullet hole in the heart," and "death from hemorrhage due to damage to left and right subclavian arteries from wounds to the left upper arm." This discrepancy is cited as "evidence that police are concealing the truth." Additionally, supporters point to one missing bullet among those that allegedly struck Abe, and some suggest the possibility of using special bullets (such as those that dissolve in the body).

• Claims Highlighting Unnatural Bullet Trajectory, Gunshots, and Scene Conditions

Arguments that the handmade gun (pipe gun) allegedly used by Yamagami could not have inflicted fatal wounds, or that video recordings of the scene captured separate gunshots (from a sniper). Claims that bullet holes on flags, street campaign vehicles, and distant buildings were positioned inconsistently with Yamagami's location, or suggest shooting from another direction. Variations include "Yamagami fired blanks while a sniper fired the fatal shot."

• Suspicious Persons and Video Interpretation at Scene

Video footage from the incident allegedly shows suspicious individuals near Yamagami (a woman operating a smartphone) engaging in "unnatural movements" or "calmly departing without apparent surprise," interpreted as possibly indicating accomplices or related parties. Claims of foreign intelligence agency involvement or political faction participation are also present.

• Political Interpretation of Motive and Background

Contentions that Yamagami's stated motive (family hardship from his mother's donations to the Unification Church, leading to resentment of Abe whom he believed had connections to the organization) was "fabricated" or "obscuring a true motive," suggesting possibilities of political assassination or false-flag operations. Some commentators draw parallels to the Kennedy assassination.

These claims spread rapidly on SNS immediately after the incident, and continue in YouTube videos (titles like "The Mastermind Behind the Assassination Revealed," with tens of thousands to over 100,000 views) and books (e.g., works by novelist Shibata Tetsukoh). Some groups, such as the "Society to Investigate the True Facts" (led by attorney Minaide Yoshikuni and including approximately 20 specialists—physicians, retired police—later expanded to around 1,000 members) have conducted independent verification, issuing statements and reports claiming "sole perpetration is scientifically and medically impossible," criticizing alleged judicial cover-up.

2. Official Response and Rebuttal

• The Nara Prefectural Police and prosecutors have consistently concluded the perpetration was by one person alone. During the 2025 trial, police officials (including a ballistics investigation specialist) appeared as witnesses, using photographs and diagrams to explain in detail that the bullet trajectory aligned perfectly in a straight line from Yamagami's position, that the positions of bullet holes on flags, campaign vehicles, and buildings were physically consistent, that autopsy findings supported this, and that the sniper theory was physically impossible.

• The defense likewise denied "any involvement by persons other than the defendant." The defendant himself acknowledged the murder charge in court.

• The National Police Agency's report on guard procedures indicated security lapses while maintaining that the act itself was perpetrated by Yamagami alone.

• Multiple perpetration was not an issue at trial; the focus was on sentencing (prosecution request and court judgment). By 2026, the defendant had received a life sentence.

Mainstream media outlets (Yomiuri Shimbun, Sankei Shimbun, etc.) have positioned these theories as "baseless conspiracy theories" or "false claims," analyzing them through psychological mechanisms such as cognitive biases (seeking certainty amid anxiety through unreliable information). Meanwhile, adherents counter that "questions remain insufficiently resolved."

3. Current Situation and Cautions

Near four years after the incident, in 2026, theories continue fragmentary circulation on SNS, but the official conclusion of sole perpetration based on court evidence remains mainstream. Such theories arose from initial confusion in medical reporting and diverse interpretation of video evidence, displaying typical conspiracy theory patterns (distrust of unclear official information).

Important Note: These theories have been officially rejected and lack evidentiary foundation. Rather than accepting conspiracy-oriented claims uncritically, consultation of primary sources and trial records is recommended. For details, refer to public trial records and trustworthy reporting.

This explanation is based on publicly available reporting and search results. For definitive details of the incident, priority should be given to facts established through judicial proceedings.