Members of Japan's Ground Self Defense Force 1st Airborne Brigade take part in a military exercise in Narashino, suburban Tokyo, Japan, Jan. 13, 2013. A total of 300 personnel, 20 aircraft and 33 vehicles took part in the open exercise at the defense force's Narashino training ground. (Xinhua/Ma Ping)





Members of Japan's Ground Self Defense Force 1st Airborne Brigade take part in a military exercise in Narashino, suburban Tokyo, Japan, Jan. 13, 2013. A total of 300 personnel, 20 aircraft and 33 vehicles took part in the open exercise at the defense force's Narashino training ground. (Xinhua/Ma Ping)





Members of Japan's Ground Self Defense Force 1st Airborne Brigade take part in a military exercise in Narashino, suburban Tokyo, Japan, Jan. 13, 2013. A total of 300 personnel, 20 aircraft and 33 vehicles took part in the open exercise at the defense force's Narashino training ground. (Xinhua/Ma Ping)





Members of Japan's Ground Self Defense Force 1st Airborne Brigade parachute into the air from a military transport aircraft during an exercise in Narashino, suburban Tokyo, Japan, Jan. 13, 2013. A total of 300 personnel, 20 aircraft and 33 vehicles took part in the open exercise at the defense force's Narashino training ground. (Xinhua/Ma Ping)





Helicopters transport weapons and vehicles during an exercise in Narashino, suburban Tokyo, Japan, Jan. 13, 2013. A total of 300 personnel, 20 aircraft and 33 vehicles took part in the open exercise at the defense force's Narashino training ground. (Xinhua/Ma Ping)





Members of Japan's Ground Self Defense Force 1st Airborne Brigade take part in a military exercise in Narashino, suburban Tokyo, Japan, Jan. 13, 2013. A total of 300 personnel, 20 aircraft and 33 vehicles took part in the open exercise at the defense force's Narashino training ground. (Xinhua/Ma Ping)





Japan's Defense Minister Itsunori Onodera arrives at the Japan Self Defense Forces training ground to inspect troops as they parachute in during an exercise in Narashino, suburban Tokyo, Japan, Jan. 13, 2013. A total of 300 personnel, 20 aircraft and 33 vehicles took part in the open exercise at the defense force's Narashino training ground. (Xinhua/Ma Ping)



