Re: J-20... The New Generation Fighter II
I think those are just excuses for Japan to remilitarize. The F-22s stationed at Okinawa are sufficient deterence for the next eight years.
Yes, that is why I say US influences had a great impact on Japanese aviation industry and their ability to develope their own fighter. However we must also note that at the time of the F-2 and most probably F-1, the Japanese do not really have any reason for fielding anything more advance, since they came under the 'protectorate' of US and China do not really field many credible fighters (the bulk being J-7 and J-8, and J-10 was really either not in existence or not in significant enough numbers. And I think J-11B is not in existence too.
However, as China's J-20 flew and programs like the J-16, JH-7B(if it is proven to be in existence), AWAC and other advance weaponries came into existence, I would imagine Japan's nervousness and whether US would be willing to aid them when things went horribly wrong. Thus things might get different now and I believe Japan had all the reason to start beefing up their own defence industry.
I think those are just excuses for Japan to remilitarize. The F-22s stationed at Okinawa are sufficient deterence for the next eight years.