"I'll show you how to avoid being arrested after threatening to launch an attack," the message read. "At 9 p.m. today, I'll murder many people at Ueno Station on the Saikyo Line."Murder threat at non-existent train station (Mainichi Daily News) (via Japan Probe)
As the JR Saikyo Line does not go through Ueno, police officers were on alert at other platforms at Ueno Station.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. Come and hear Mark speak at the ALA conference in Chicago on July 1.