Takahiro Shiraishi, infamously known as the "Twitter killer," has been executed in Japan after luring and murdering nine young victims, sparking national debates on responsibility for online interactions.
Japan Carries Out Execution of Notorious 'Twitter Killer' After Grim Serial Murders

Japan Carries Out Execution of Notorious 'Twitter Killer' After Grim Serial Murders
Takahiro Shiraishi's heinous crimes shed light on the dark side of social media interactions and the urgent need for better suicide prevention discourse.
In a landmark case that continues to haunt Japan, the nation has executed Takahiro Shiraishi, a man sentenced for the horrific murders of nine individuals in 2017. This execution marks the first capital punishment carried out in Japan since 2022, renewing discussions about the implications of social media on mental health and suicide. Shiraishi, then aged 30, notoriously contacted his victims through Twitter—now X—where he posed as a sympathetic figure ready to assist those in emotional pain.
Most of his victims were young women aged between 15 and 26, whom he lured to his home in Zama, near Tokyo, before subjecting them to brutal acts of violence. The grisly details came to light when police discovered dismembered body parts hidden in coolers and toolboxes within his apartment, leading to the chilling nickname "house of horrors."
Initially, Shiraishi's defense team argued that he should face a lesser charge of "murder with consent," claiming that his victims had willingly consented to their fate. However, he later retracted this defense, admitting to killing without their permission. Legal proceedings drew significant public attention and highlighted the urgent need for reform in how platforms like Twitter handle discussions on suicide and self-harm.
In the wake of this case, Twitter made notable changes to its policies regarding self-harm discourse, aiming to create a safer online environment. As Japan reflects on the consequences of Shiraishi’s actions, the case serves as a somber reminder of the complexities within social media interactions and the critical importance of addressing mental health vulnerabilities.
Most of his victims were young women aged between 15 and 26, whom he lured to his home in Zama, near Tokyo, before subjecting them to brutal acts of violence. The grisly details came to light when police discovered dismembered body parts hidden in coolers and toolboxes within his apartment, leading to the chilling nickname "house of horrors."
Initially, Shiraishi's defense team argued that he should face a lesser charge of "murder with consent," claiming that his victims had willingly consented to their fate. However, he later retracted this defense, admitting to killing without their permission. Legal proceedings drew significant public attention and highlighted the urgent need for reform in how platforms like Twitter handle discussions on suicide and self-harm.
In the wake of this case, Twitter made notable changes to its policies regarding self-harm discourse, aiming to create a safer online environment. As Japan reflects on the consequences of Shiraishi’s actions, the case serves as a somber reminder of the complexities within social media interactions and the critical importance of addressing mental health vulnerabilities.