Takahiro Shiraishi was executed for the killings in 2017 of nine victims, most of whom had posted suicidal thoughts on social media.

Takahiro Shiraishi’s victims included young women considering suicide, whom he lured to his home using social media and murdered. It was Japan’s first execution since 2022.

Dubbed the "Twitter Killer", Takahiro Shiraishi’s crimes shocked the country known for its low crime rate. Between August and October 2017, he preyed on the vulnerable, targeting mostly young women who had expressed suicidal thoughts online.