It’s been a busy week for hangmen. In Japan, Tomohiro Kato, a 39-year-old man, was hanged at a Tokyo prison for killing seven people and injuring ten others in a 2008 murderous rampage in which he drove a truck into a crowd before stabbing several other random victims. Kato admitted his guilt and blamed his crime on his alienation from society and insults he had received on social media.