The university student brought the grenade in inside the plane.

The event from which the safety of Airlines in Japan was asked occurred.

The Okinawa prefectural police Yaeyama station put the metal by which the college man in Yokohama City in the sightseeing trip picked up the grenade and knowing in the rucksack, entrusted as luggage by 613 flights of Japan Trans Ocean Air (JTA) (passenger and 66 crew) for the stone wall where the Naha airport had been left at 2:10PM, March 21st, 2009, and received it in Ishigaki airport.

Afterwards, it extended to the Taketomi island, the inn manager at the staying destination saw the metal on March 22, 2009, and it was informed, "There is a possibility of the grenade".

The inspector overlooked by the X-ray check in the Naha airport, and the Ministry of Land, Infrastructure and Transport Naha airport office was requested to report on details to JTA on March 23, 2009.
The metal is thought to be an unexploded bomb of the hand grenade used at the game against Okinawa by 10cm in length and 60cm in the diameter in the oval.

It was a thing this time though got into the news to the contraband of the proxy bomb and the drug to the airliner of the Schiphol airport in Amsterdam to show the weak point in a busy, empty hub, successes of a Dutch journalist fourthly in Europe, and journalist's bringing the proxy bomb and the drug in Britain sometimes by the pretext of security verification of the airport and the railway in.

The Japanese regions airport was complete defenseless.
The terrorist is dangerous and the idea of a local airport of not attacking it is very dangerous.

Google Earth pointer information on Naha airport

Google Earth pointer information on Ishigaki airport
24.345169, 124.184483‎