24 Apr 2014
The incident happened at the Haneda airport from Tokyo a day before the official visit of the US President Barrack Obama.
“Some 16,000 officers have been mobilized around the clock in the capital, while coin lockers and trash bins have been sealed in some stations and thousands of security cameras have been put into operation,” the article said.
A transport ministry official said the memo was found half an hour later in the departure lobby on the floor.
The security codes were changed at the ministry's demand to prevent any security breach. The visit of the US President is the first in nearly two decades.