The right wing will leap on this as evidence of the supposed pointlessness of gun control. Via the Guardian:
At least 15 people have been killed and another 45 injured after a man went on a rampage with a knife at a Japanese facility for disabled people in the early hours of Tuesday morning.
Japan’s public broadcaster NHK said the suspect, reported to have the family name Uematsu, had been arrested after he attacked residents of the Tsukui Yamayuri En (Tsukui Lily Garden) facility in Sagamihara in Kanagawa Prefecture, south of Tokyo.
The 26-year-old was arrested after turning himself in to police, NHK said. Police are investigating the motive behind the attack, which is believed to have started at about 2.30am local time. Emergency workers said 20 of the injured people were in serious condition.
The suspect is reportedly a former staffer at the facility. Some reports are now putting the number of dead at 19.