Japan's first stealth fighter X2 Friday morning by the first flight, which contributed to Japan's aspirations to increase their advantage in the air against China.
These initiatives have also been taken at a time when Japan is trying to revive a large part of the aging 150-strong Japanese Air Defense Force F-15J fighters, sources say.
At a time when such areas as the East China Sea and South China Sea between China and the United States and its allies, tension, Tokyo wants to be sure to be able to defend the airspace over Japan and its territories.
Japan had originally intended to buy invisible F-22 fighter jets from the United States to avoid the need to build its own aircraft, but after numerous discussions in Washington refused to sell the aircraft.
Secret fighter technology, tested X2, will be used and another new fighter, who has called the F-3.