Takahiro Shiraishi's heinous crimes triggered nationwide discussions about the impact of online platforms on suicide and mental health, as well as the broader implications of consent in murder cases.
Japan Executes Notorious 'Twitter Killer' Takahiro Shiraishi for Serial Murders

Japan Executes Notorious 'Twitter Killer' Takahiro Shiraishi for Serial Murders
Japan enforces capital punishment for the first time since 2022, executing a man known for luring and murdering nine victims via social media.
Japan has carried out its first execution since 2022, taking the life of Takahiro Shiraishi, a man infamously known as the "Twitter killer." Shiraishi, who murdered nine people in 2017, shocked the nation and ignited intense dialogue over how online discussions surrounding suicide are handled.
The 30-year-old killer used social media to connect with predominantly young female victims aged between 15 and 26, inviting them to his apartment where he would ultimately strangle and dismember them. The grisly discovery of body parts in Zama, a city located near Tokyo, unfolded in October 2017 when police were investigating the disappearance of one of the victims.
Shiraishi, during investigations, admitted to preying on nine individuals in desperate mental states, primarily through interactions on Twitter, now known as X. He presented himself as someone who could alleviate their suffering, and in an unsettling twist, he even suggested he would take his own life alongside his victims. His Twitter bio, famously reading "I want to help people who are really in pain. Please DM me anytime," illustrated the manipulative nature of his interactions.
When authorities searched his apartment, they uncovered dismembered bodies stored in coolers and toolboxes, labelling the scene a "house of horrors." Although prosecutors argued for the death penalty, Shiraishi’s legal team attempted to mitigate his responsibility by claiming that the victims had consented to be killed, requesting a psychological evaluation of their client.
Contradicting his legal team's defense, Shiraishi later revealed that he had killed his victims without their consent. His verdict hearing in December 2020 drew significant public attention, with hundreds attending as he was sentenced to death. The gruesome murders not only shocked Japan but also prompted Twitter to update its policies to prohibit content that encourages suicide or self-harm.
For individuals feeling distressed, various organizations are available to provide support, including helplines in both the UK and Japan, ensuring resources for those in need are within reach.
The 30-year-old killer used social media to connect with predominantly young female victims aged between 15 and 26, inviting them to his apartment where he would ultimately strangle and dismember them. The grisly discovery of body parts in Zama, a city located near Tokyo, unfolded in October 2017 when police were investigating the disappearance of one of the victims.
Shiraishi, during investigations, admitted to preying on nine individuals in desperate mental states, primarily through interactions on Twitter, now known as X. He presented himself as someone who could alleviate their suffering, and in an unsettling twist, he even suggested he would take his own life alongside his victims. His Twitter bio, famously reading "I want to help people who are really in pain. Please DM me anytime," illustrated the manipulative nature of his interactions.
When authorities searched his apartment, they uncovered dismembered bodies stored in coolers and toolboxes, labelling the scene a "house of horrors." Although prosecutors argued for the death penalty, Shiraishi’s legal team attempted to mitigate his responsibility by claiming that the victims had consented to be killed, requesting a psychological evaluation of their client.
Contradicting his legal team's defense, Shiraishi later revealed that he had killed his victims without their consent. His verdict hearing in December 2020 drew significant public attention, with hundreds attending as he was sentenced to death. The gruesome murders not only shocked Japan but also prompted Twitter to update its policies to prohibit content that encourages suicide or self-harm.
For individuals feeling distressed, various organizations are available to provide support, including helplines in both the UK and Japan, ensuring resources for those in need are within reach.