IME, it's impossible to get a realistic looking Japanese face on V3.  At least if you want to use any expressions with it. 

The International Beauties package at DAZ has some okay Asian face morphs, but they only look good if you don't try to add any expressions.  If you do, the eyelids break, the teeth poke through the cheeks, etc.  Steph Petite is a little better, but her eyelids still look weird with the Asian face morphs if you try to show her blinking.

There's a reason why I shelled out for Miki, despite having V3, SP, and a bunch of supposedly Asian characters for them.  Miki was designed to be Asian from the start, and it makes a huge difference.