19 people are dead and 20 injured following a knife attack outside Tokyo, it is reported.
A man attacked a centre for the disabled in Sagamihara, then turned himself in, police said, according to Kyodo news agency.
The attacker is believed to be a 26-year-old who was a former employee at the centre.
Television footage showed a number of ambulances parked outside the centre, with medics and other rescue workers running in and out.
Richard LLoyd Parry is the Asia Editor for The Times of London, based in Tokyo: “From what we can see this is not any kind of political attack, it’s not anything like the sort of attacks we’ve been hearing about from Germany in the past few days.
“It’s somebody perhaps with a grievance, clearly someone who’s deranged and disturbed.”