Japanese Billions $ 6th Generation Fighter Jet Shocked Russia and ChinaLethal, intelligent, and out to prove a point, Japan’s sixth-generation F-X fighter is all it takes to make Japan a world power again. A fighter with almost no interest in multirole capabilities – after all, Japan already has $23 billion worth of American multirole F-35 Lightning IIs, the F-X is instead born out of the need for an air superiority fighter. So superior, in fact, that both the US and the UK could be making plans to join the program and form a united sixth-generation program.