Blame the Game
A screencap from the news.
The Japanese media take it a step further and blame it on the game - specifically Dragon Sword for the NDS.
A boy went around killing 9 people and when he was finally caught, they found the game Dragon Sword in his bag.
The program highlighted "A game where one used a sword to slash at enemies was found in the killers bag."
Dragon Sword in action below - the apparent motive for the killings.
Via Itai News.