A little bird told me that Japan is building a Technology demonstrator
well that's true and false. The fighter probably exist, but it's not great, it's the Tejas, JF-17 of the fifth gen world, probably not even that.
Japan is technologically advanced, but that doesn't mean they can make a new fighter based on nothing, they tried. China has since the 1980s been developing aircraft, a long 30 years, but a worthwhile 30 years.
We are less than 2 years away in achieving exportable 4th generation engines, and same amount of time for 5th gen engine test flight. We have designed and improved upon, various aircraft.
All current Japanese fighters are direct copies of Americans. They are no better suited to design an aircraft than South Korea, who also only copies directly.
But either way, Russia, America, China are in the forefront of this field, everyone agrees, since you are trying to catch up to China, using inferior tech wont' be the best option would it.
So PAK-FA is still India's only option, unless you would go with F-35, but then you might need to open a base or listen to American commands at least somewhat.
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manojb
Some are leaving because they don't trust the government as well as the economy's stability. With a victory over Japan/US, axis of evil, people will know this is to stay.
Everyone needs a victory, Napoleon needed one, America needed one, Japan needed one, and every newly created state needs one. China the normal state is actually only 30 years old more or less.