I have never understood this obsession with identity in regard to terrorism.

Have there really been many terrorist incidents where identity fraud was 
an issue? If the London bombers wer carrying an ultra secure biometric 
fingerprinted retina scanning photo ID card, HOW would they have been 
prevented from doing what they did??

I don't think known or wanted terrorists are going to try to sneak into 
Japan to commit terrorist acts. If it happens, I'm sure the 
perpetrator(s) will be in the country legally under a real identity.