A Japanese Ground Self-Defense Force AH-1S helicopter fires anti-tank missile during an annual training session near Mount Fuji at Higashifuji training field in Gotemba, west of Tokyo, August 25, 2016. REUTERS/Kim Kyung-Hoon

A Japanese Ground Self-Defense Force AH-1S helicopter fires anti-tank missile during an annual training session near Mount Fuji at Higashifuji training field in Gotemba, west of Tokyo, August 25, 2016. REUTERS/Kim Kyung-Hoon

A Japanese Ground Self-Defense Force AH-1S helicopter fires anti-tank missile during an annual training session near Mount Fuji at Higashifuji training field in Gotemba, west of Tokyo, August 25, 2016. REUTERS/Kim Kyung-Hoon

August 31, 2016 10:33 AM (UTC+8)