The retouch of the chin is very evident in some shots from Kazuyoshi, I think he simply doesn't like girls with strong facial bones and square shaped face, so he makes the chin longer and the jaw thiner... he has made some of the worst photoshop jobs of all time:
I have nothing against retouching, because specially in this beauty shots, failures in the skin and generally anything that does not look perfect can ruin the photo. But when you change the facial structure of someone... well, that's really a bad thing! xD
We can see it in the latest Leslie Kee shots, Ayu is obviously retouched, her skin is blured so we can't see a single pore, but we can see her chin, her eyes and her jaw (though they have tweaked the jowl in the photo where you can't see her eyes).
And knowing how Ayu is with this "don't wanna become adult" and "makeup makes me confident" I wouldn't be surprised if she asked for the pics to be extremely retouched to show the image of herself that she really has.