TinEye is used for all sorts of things, but if you meet somebody online and you want to make sure the picture your being told is that person, then checking with TinEye is one good way to start off.
As for Aki Hoshino, sure she looks young, but as pointed out before a lot of Asian ladies can look younger than their true age. My Mahal, Rizza can often look younger than her 25 years.Sometimes I swear she is more like 20...
As for the picture that was posted at the top of this thread, here is the full image.. For those still in doubt, visit This page for an uncropped image with a link to a full gallery (none nude, pervs)