Here is the F-22J Japanese Raptor. ...but we still need to work out a security plan of the technology. The Japanese Raptor will be a customized variant of the U.S. variant, with its top-secret tech removed and replaced with an indigenous avionics suite, made by Sony, Toshiba and Mitsubishi Electric, like the AESA radar, ISR and nav/ comm systems, MAWS, HMD etc.The problem lies in the high level of systems integration in both the F-22 and F-35.
A short time ago, Lock-Mart got into some disagreements with some F-35 partners (particularly Britain) because they wanted access to the systems software that controlled the F-35. Lock-Mart steadfastly refused to divulge that information, because it reveals A LOT of trade secrets. This limits the ability of partner nations to modify the F-35 with home-grown solutions.
I suspect similar issues will arise if the F-22 is ever allowed and offered for sale to allied nations.