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

Takahiro Shiraishi, 34, was hanged after murdering nine people — eight of whom were young women he targeted after they expressed suicidal thoughts on Twitter.

He was dubbed the "Twitter killer" as he contacted victims via the social media platform.Justice Minister Keisuke Suzuki, who authorised Shiraishi's hanging, said he made the decision after careful examination,