Last Sunday at  half past noon  Tomohiro Kato drove his  truck into a crowd  at Akihabara. He then  left his truck and started stabbing people in the street with a large knife. Before he was arrested he killed 7 people and injured 10.  The  shops on both sides of the street where people died sell violent  imaginary death in thousands of violent computer and video games. On that Sunday real death came to Akihabara .  Now people mourn at small shrines erected on the places where the victims died. I walked away  from this tragic place with these photos and one unanswered question.  Why did this happen ?