A prototype of the first Japan-made stealth fighter is pictured at a Mitsubishi Heavy Industries' factory in Toyoyama town, Aichi Prefecture, central Japan, in this file photo taken by Kyodo January 28, 2016. REUTERS/Kyodo/Files

A prototype of the first Japan-made stealth fighter is pictured at a Mitsubishi Heavy Industries’ factory in Toyoyama town, Aichi Prefecture, central Japan, in this file photo taken by Kyodo January 28, 2016. REUTERS/Kyodo/Files

A prototype of the first Japan-made stealth fighter is pictured at a Mitsubishi Heavy Industries' factory in Toyoyama town, Aichi Prefecture, central Japan, in this file photo taken by Kyodo January 28, 2016. REUTERS/Kyodo/Files

March 23, 2016 3:16 AM (UTC+8)