So Glad Japan Has Gun Control

7/26/16 Washington Post:

SAGAMIHARA, Japan – At 1:37 a.m. Tuesday, security cameras recorded a black car entering a parking lot, then a man getting out of the vehicle and moving toward a building.

That was the start.
The man, apparently using his first-hand knowledge of the buildings that form the Tsukui Yamayuri-en residential center for the disabled, took a hammer and smashed a first-floor window. He then climbed inside, tied up some, maybe all, of the eight caregivers on duty, stole a set of keys and began a bloody rampage.
In the worst mass killing in Japan in about 80 years, the 26-year-old local man identified as Satoshi Uematsu went through the locked rooms of the care facility, where he had worked until February, and stabbed 45 people in less than an hour.
By the time he was done, 10 men and nine women would be dead or dying, and 26 would be injured. Twenty of those would be in critical condition, some with deep stab wounds to their necks....

A few days later, Uematsu told his colleagues that there was no point in seriously disabled people living, so they should be euthanized.

The colleagues alerted police, triggering a chain of events in which Uematsu was involuntarily committed to a psychiatric hospital, where he tested positive for marijuana use — a highly illegal substance in Japan — and was diagnosed as having drug-induced psychosis. Twelve days later, he was cleared for release, with doctors declaring that he no longer presented a threat.