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.

Japan executed a 34-year-old death row inmate known as the "Twitter Killer," who was convicted of killing nine people at his apartment south of Tokyo in 2017.