From google.com:

Japanese police arrested a 19-year-old man Monday for allegedly threatening on the Internet to go on a stabbing rampage at Tokyo Disneyland.

The message, posted on a website by someone using a cellphone June 15, came a week after a man posted similar warnings before killing seven people in a downtown Tokyo knifing rampage. Authorities were also searching for a woman suspected of wounding three people in a knifing incident Sunday.

Since the deadly stabbing attack in early June, police have arrested several people for allegedly using the Internet to make chillingly specific threats of violence.

“I will go to Disneyland to stab visitors to death,” the 19-year-old wrote, said a police official in Chiba, the suburban area where the amusement park is located.

The suspect’s name was not released because he is below the age of 20 - a minor under Japanese law.

Investigators have found no evidence he was preparing to carry out a real assault, the official said on condition of anonymity, citing department policy.

Link