Japan has executed Takahiro Shiraishi, dubbed the 'Twitter killer,' by hanging. Shiraishi was convicted of murdering eight women and one man. He lured his victims, many of whom expressed suicidal thoughts on Twitter, to his apartment where he dismembered their bodies and stored the remains. The case sparked widespread outrage and debate in Japan regarding online safety and mental health support. Shiraishi confessed to the crimes, stating his motive was sexual gratification. The execution marks the end of a high-profile case that shook the nation.