I heard that the age of consent is 13 over there, so if Kaji was to screw
Asuka or Gendo was to screw Rei and no-one forced anyone to have sex, then
neither of them would be breaking the law and neither could be called
pedophiles. Is that right?

I'm guessing that to a Japanese person, Rei and Asuka would just be sexy
young women, rather than sexy jailbait.

I cant believe that Gainax would be allowed to sexualise jailbait girls on
TV to such an extent if this were not the case, though I think that some of
Evangelions popularity over here (UK) and in America is because the girls
ARE jailbait and what is forbidden is often the most desirable.